Keysight 34970A Data Acquisition/Switch Unit Service Guide
warranty.fm Page 0 Tuesday, May 9, 2006 4:55 PM © Copyright Keysight Technologies, 1997- 2015 No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Keysight Technologies as governed by the United States and international copyright laws.
Note: Unless otherwise indicated, this manual applies to all serial numbers. The Keysight Technologies 34970A combines precision measurement capability with flexible signal connections for your production and development test systems. Three module slots are built into the rear of the instrument to accept any combination of data acquisition or switching modules.
The Front Panel at a Glance Denotes a menu key. See the next page for details on menu operation.
The Front-Panel Menus at a Glance Several of the front-panel keys guide you through menus to configure various parameters of the instrument (see previous page). The following steps demonstrate the menu structure using the key. 1 Press the menu key. You are automatically guided to the first level of the menu. Rotate the knob to view the other choices on the first level of the menu. G The menu will automatically timeout after about 20 seconds of inactivity.
Display Annunciators SCAN MON VIEW CONFIG ADRS RMT ERROR EXT ONCE MEM LAST MIN MAX SHIFT 4W OC Scan is in progress or enabled. Press and hold again to turn off. Monitor mode is enabled. Press again to turn off. Scanned readings, alarms, errors, or relay cycles are being viewed. Channel configuration is in progress on displayed channel. Measurement is in progress. Instrument is addressed to listen or talk over the remote interface. Instrument is in remote mode (remote interface).
The Rear Panel at a Glance 1 Slot Identifier (100, 200, 300) 2 Ext Trig Input / Alarm Outputs / Channel Advance Input / Channel Closed Output (for pinouts, see chapter 4 in User’s Guide) 3 RS-232 Interface Connector 4 5 6 7 Power-Line Fuse-Holder Assembly Power-Line Voltage Setting Chassis Ground GPIB (IEEE-488) Interface Connector Use the Menu to: • Select the GPIB or RS-232 interface (see chapter 2 in User’s Guide). • Set the GPIB address (see chapter 2 in User’s Guide).
The Plug-In Modules at a Glance For complete specifications on each plug-in module, refer to the module sections in chapter 1.
34903A 20-Channel Actuator / General-Purpose Switch • 300 V, 2 A actuation and switching • SPDT (Form C) latching relays • Breadboard area for custom circuits Use this module for those applications that require high-integrity contacts or quality connections of non-multiplexed signals. This module can switch 300 V, 1 A (50 W maximum switch power) to your device under test or to actuate external devices.
34907A Multifunction Module • Two 8-bit Digital Input/Output ports, 400 mA sink, 42 V open collector • 100 kHz Totalize input with 28 bits of resolution • Two 16-bit, ± 12 V Calibrated Analog Outputs Use this module to sense status and control external devices such as solenoids, power relays, and microwave switches. For greater flexibility, you can read digital inputs and the count on the totalizer during a scan.
In This Book Specifications Chapter 1 lists the technical specifications for the mainframe and plug-in modules. Quick Start Chapter 2 helps you get familiar with a few of the instrument’s front-panel features. Front-Panel Overview Chapter 3 introduces you to the front-panel menus and describes some of the instrument’s menu features. Calibration Procedures Chapter 4 provides calibration, verification, and adjustment procedures for the instrument.
Contents Chapter 1 Specifications DC, Resistance, and Temperature Accuracy Specifications 16 DC Measurement and Operating Characteristics 17 AC Accuracy Specifications 18 AC Measurement and Operating Characteristics 19 Measurement Rates and System Characteristics 20 Module Specifications 21 BenchLink Data Logger Software Specifications 24 Product and Module Dimensions 25 To Calculate Total Measurement Error 26 Interpreting Internal DMM Specifications 28 Configuring for Highest Accuracy Measurements 31 Cont
Contents Chapter 4 Calibration Procedures Contents KeysightTechnologies Calibration Services 63 Calibration Interval 63 Adjustment is Recommended 63 Time Required for Calibration 64 Automating Calibration Procedures 64 Recommended Test Equipment 65 Input Connections 66 Calibration Security 67 To Unsecure the Instrument Without the Security Code 68 Calibration Message 69 Calibration Count 69 Calibration Procedure 70 Aborting a Calibration in Progress 70 Test Considerations 71 Performance Verification Test
Contents Contents Chapter 5 Theory of Operation System Block Diagram 119 Floating Logic 120 Memory 123 Earth-Referenced Logic 124 Power Supplies 125 Front Panel 127 Backplane 128 Analog Bus 128 Digital Bus 128 Internal DMM 129 DMM Block Diagram 129 Input 130 Input Amplifier 131 Ohms Current Source 133 AC Circuit 134 A-to-D Converter 136 Switch Modules 138 Switch Module Control 138 Relay Drivers 140 34901A 142 34902A 144 34903A 146 34904A 147 34905A/34906A 148 34908A 149 Multifunction Module 151 Multifunct
Contents Chapter 6 Service (continued) Contents Troubleshooting Hints 163 Unit is Inoperative 163 Unit Reports Error 705 164 Isolating to an Assembly 164 Unit Fails Self-Test 164 Power Supplies 165 Self-Test Procedures 167 Power-On Self-Test 167 Complete Self-Test 167 Plug-in Module Self-Test 167 Self-Tests 168 Battery Check and Replacement 172 To Verify the Battery 173 To Replace the Battery 173 Disassembly 174 General Disassembly 175 Internal DMM Disassembly 176 Front-Panel Chassis Disassembly 177 Addi
Contents Contents Chapter 8 Schematics Keysight34970A System Block Diagram 221 A1 Component Locator (top) 222 A1 Component Locator (bottom) 223 A1 Power Supply Schematic (Sheet 1 of 4) 224 A1 Floating Logic Schematic (Sheet 2 of 4) 225 A1 Earth Referenced Logic Schematic (Sheet 3 of 4) 226 A1 Memory Schematic (Sheet 4 of 4) 227 A2 Component Locator 228 A2 Display and Keyboard Schematic 229 A3 Component Locator 230 A3 Backplane Schematic 231 A4 Component Locator (top) 232 A4 Component Locator (bottom) 233
1 1 • DC, Resistance, and Temperature Accuracy Specifications, on page 16 • DC Measurement and Operating Characteristics, on page 17 • AC Accuracy Specifications, on page 18 • AC Measurement and Operating Characteristics, on page 19 • Measurement Rates and System Characteristics, on page 20 • Module Specifications: 34901A, 34902A, 34908A, 34903A, 34904A, on page 21 34905A, 34906A, on page 22 Typical AC Performance Graphs, on page 23 34907A, on page 24 • BenchLink Data Logger Software Specifications, on pag
Chapter 1 Specifications DC, Resistance, and Temperature Accuracy Specifications DC, Resistance, and Temperature Accuracy Specifications ± ( % of reading + % of range ) [1] Includes measurement error, switching error, and transducer conversion error Range [3] Function Test Current or Burden Voltage DC Voltage 100.0000 mV 1.000000 V 10.00000 V 100.0000 V 300.000 V Resistance [4] 100.0000 Ω 1.000000 kΩ 10.00000 kΩ 100.0000 kΩ 1.000000 MΩ 10.00000 MΩ 100.
Chapter 1 Specifications DC Measurement and Operating Characteristics 1 DC Measurement and Operating Characteristics DC Measurement Characteristics [1] DC Voltage Measurement Method: A/D Linearity: Input Resistance: 100 mV, 1 V, 10 V ranges 100 V, 300 V ranges Input Bias Current: Input Protection: Resistance Measurement Method: Continuously Integrating, Multi-slope III A/D Converter 0.0002% of reading + 0.
Chapter 1 Specifications AC Accuracy Specifications AC Accuracy Specifications ± ( % of reading + % of range ) [1] Includes measurement error, switching error, and transducer conversion error Function True RMS AC Voltage [4] Frequency and Period [6] True RMS AC Current 34901A Only Range [3] Frequency 24 Hour [2] 23 °C ± 1 °C 90 Day 23 °C ± 5 °C 1 Year 23 °C ± 5 °C Temperature Coefficient /°C 0 °C – 18 °C 28 °C – 55 °C 100.
Chapter 1 Specifications AC Measurement and Operating Characteristics 1 AC Measurement and Operating Characteristics AC Measurement Characteristics [1] AC Operating Characteristics [4] True RMS AC Voltage Measurement Method: Function ACV, ACI: Crest Factor: Additional Crest Factor Errors (non-sinewave): [2] AC-coupled True RMS – measures the ac component of input with up to 300 Vdc of bias on any range Maximum 5:1 at Full Scale Crest Factor 1-2: Crest Factor 2-3: Crest Factor 3-4: Crest Factor 4-5: 0
Chapter 1 Specifications Measurement Rates and System Characteristics Measurement Rates and System Characteristics Single Channel Measurement Rates [1] [2] System Characteristics Function DCV, 2-Wire Ohms: Resolution 61 ⁄2 (10 PLC) 51 ⁄2 (1 PLC) 41 ⁄2 (0.02 PLC) Thermocouple: 0.1 °C (1 PLC) 0.1 °C (0.02 PLC) 49 (47) 280 RTD, Thermistor: 0.01 °C (10 PLC) 0.1 °C (1 PLC) 1 °C (0.02 PLC) 6 (5) 47 (47) 280 61 ⁄2 Slow (3 Hz) 61 ⁄2 Medium (20 Hz) 61 ⁄2 Fast (200 Hz) 61 ⁄2 [3] 0.
Chapter 1 Specifications Module Specifications 1 Module Specifications 34901A, 34902A, 34908A, 34903A, 34904A Multiplexer General 34901A Number of Channels Connects to Internal DMM 34902A 34908A Actuator Matrix 34903A 34904A 20+2 16 40 20 4x8 2/4 wire 2/4 wire 1 wire SPDT 2 wire No No Yes Yes Yes Scanning Speed [1] 60 ch/s 250 ch/s 60 ch/s Open/Close Speed 120/s 120/s 70/s 120/s 120/s 300 V Maximum Input Voltage (dc, ac rms) 300 V 300 V 300 V 300 V Current (dc, ac rms
Chapter 1 Specifications Module Specifications Module Specifications 34905A, 34906A RF Multiplexer General Number of Channels 34905A 34906A Dual 1x4 50Ω Dual 1x4 75Ω The ac performance graphs are shown on the following page. AC Characteristics 60/s Insertion Loss (dB) MHz Voltage (dc, ac rms) 42 V MHz Current (dc, ac rms) 0.7 A Power (W, VA) 20 W Open/Close Speed Maximum Input DC Characteristics Offset Voltage [1] < 6 µV Initial Closed Channel R [1] < 0.
Chapter 1 Specifications Typical AC Performance Graphs 1 Typical AC Performance Graphs 34905A, 34906A Insertion Loss (50Ω) Insertion Loss (75Ω) Direct to Module Using provided adapter cables VSWR (50Ω) VSWR (75Ω) Crosstalk (50Ω) Crosstalk (75Ω) 23
Chapter 1 Specifications Module Specifications Module Specifications Software Specifications 34907A Digital Input / Output BenchLink Data Logger (not included with Option 001) Port 1, 2: Vin(L): Vin(H): Vout(L): Vout(H): Vin(H) Max: Alarming: Speed Latency Read/Write Speed: 8 Bit, input or output, non-isolated < 0.8V (TTL) > 2.0V (TTL) < 0.8V @ Iout = - 400 mA > 2.
Chapter 1 Specifications Product and Module Dimensions 1 Product and Module Dimensions 103.6 mm 254.4 mm 374.0 mm 88.5 mm 212.6 mm 348.3 mm Module TOP 315.6 91.9 All dimensions are shown in millimeters.
Chapter 1 Specifications To Calculate Total Measurement Error To Calculate Total Measurement Error Each specification includes correction factors which account for errors present due to operational limitations of the internal DMM. This section explains these errors and shows how to apply them to your measurements. Refer to “Interpreting Internal DMM Specifications,” starting on page 28, to get a better understanding of the terminology used and to help you interpret the internal DMM’s specifications.
Chapter 1 Specifications To Calculate Total Measurement Error 1 Understanding the “ % of range ” Error The range error compensates for inaccuracies that result from the function and range you select. The range error contributes a constant error, expressed as a percent of range, independent of the input signal level. The following table shows the range error applied to the DMM’s 24-hour dc voltage specification.
Chapter 1 Specifications Interpreting Internal DMM Specifications Interpreting Internal DMM Specifications This section is provided to give you a better understanding of the terminology used and will help you interpret the internal DMM’s specifications. Number of Digits and Overrange The “number of digits” specification is the most fundamental, and sometimes, the most confusing characteristic of a multimeter.
Chapter 1 Specifications Interpreting Internal DMM Specifications 1 Resolution Resolution is the numeric ratio of the maximum displayed value divided by the minimum displayed value on a selected range. Resolution is often expressed in percent, parts-per-million (ppm), counts, or bits. For example, a 61⁄2-digit multimeter with 20% overrange capability can display a measurement with up to 1,200,000 counts of resolution. This corresponds to about 0.
Chapter 1 Specifications Interpreting Internal DMM Specifications 24-Hour Accuracy The 24-hour accuracy specification indicates the internal DMM’s relative accuracy over its full measurement range for short time intervals and within a stable environment. Short-term accuracy is usually specified for a 24-hour period and for a ±1 °C temperature range. 90-Day and 1-Year Accuracy These long-term accuracy specifications are valid for a 23 °C ± 5 °C temperature range.
Chapter 1 Specifications Configuring for Highest Accuracy Measurements 1 Configuring for Highest Accuracy Measurements The measurement configurations shown below assume that the internal DMM is in its Factory Reset state. It is also assumed that manual ranging is enabled to ensure proper full scale range selection. DC Voltage, DC Current, and Resistance Measurements: • Set the resolution to 6 digits (you can use the 6 digits slow mode for further noise reduction).
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2 2 Quick Start
Quick Start One of the first things you will want to do with your instrument is to become acquainted with the front panel. We have written the exercises in this chapter to prepare the instrument for use and help you get familiar with some of its front-panel operations. The front panel has several groups of keys to select various functions and operations. A few keys have a shifted function printed in blue below the key. To perform a shifted function, press (the SHIFT annunciator will turn on).
Chapter 2 Quick Start To Prepare the Instrument for Use To Prepare the Instrument for Use 2 1 Check the list of supplied items. Verify that you have received the following items with your instrument. If anything is missing, contact your nearest Keysight Technologies Sales Office. One power cord. One User’s Guide. This Service Guide. One Quick Reference Guide. Certificate of Calibration (if you ordered the internal DMM). Quick Start Kit (if you ordered the internal DMM): • One RS-232 cable.
Chapter 2 Quick Start To Connect Wiring to a Module To Connect Wiring to a Module 1 Remove the module cover. 2 Connect wiring to the screw terminals. 20 AWG Typical 6 mm 3 Route wiring through strain relief. 4 Replace the module cover. Cable Tie Wrap (optional) 5 Install the module into mainframe. Channel Number: Slot Channel 36 Wiring Hints... • For detailed information on each module, refer to the 34970A User’s Guide.
Chapter 2 Quick Start To Connect Wiring to a Module Thermocouple Thermocouple Types: B, E, J, K, N, R, S, T 2-Wire Ohms / RTD / Thermistor 2 DC Voltage / AC Voltage / Frequency Ranges: 100 mV, 1 V, 10 V, 100 V, 300 V 4-Wire Ohms / RTD Ranges: 100, 1 k, 10 k, 100 k, 1 M, 10 M, 100 MΩ RTD Types: 0.00385, 0.00391 Thermistor Types: 2.2 k, 5 k, 10 k DC Current / AC Current Channel n (source) is automatically paired with Channel n+10 (sense) on the 34901A or Channel n+8 (sense) on the 34902A.
Chapter 2 Quick Start To Set the Time and Date To Set the Time and Date All readings during a scan are automatically time stamped and stored in non-volatile memory. In addition, alarm data is time stamped and stored in a separate non-volatile memory queue. 1 Set the time of day. Utility Use and to select the field to modify and turn the knob to change the value. You can also edit the AM/PM field. TIME 03:45 PM 2 Set the date. Utility Use and the value.
Chapter 2 Quick Start To Configure a Measurement Channel To Configure a Measurement Channel Use this general procedure to configure a measurement channel. 2 1 Select the channel. Turn the knob until the desired channel is shown on the right side of front-panel display. The channel number is a three-digit number; the left-most digit represents the slot number (100, 200, or 300) and the two digits on the right indicate the channel number (102, 110, etc.). Note: You can use or next slot.
Chapter 2 Quick Start To Monitor a Single Channel To Monitor a Single Channel You can use the Monitor function to continuously take readings on a single channel, even during a scan. This feature is used during front panel calibration procedures. 1 Select the channel to be monitored. Only one channel can be monitored at a time but you can change the channel being monitored at any time by turning the knob. 2 Enable monitoring on the selected channel.
Chapter 2 Quick Start To Close a Channel To Close a Channel On the multiplexer and switch modules, you can close and open individual relays on the module. However, note that if you have already configured any multiplexer channels for scanning, you cannot independently close and open individual relays on that module. 1 Select the channel. Turn the knob until the desired channel is shown on the right side of front-panel display. For this example, select channel 213. 2 Close the selected channel.
Chapter 2 Quick Start If the Instrument Does Not Turn On If the Instrument Does Not Turn On Use the following steps to help solve problems you might encounter when turning on the instrument. 1 Verify that there is ac power to the instrument. First, verify that the power cord is firmly plugged into the power receptacle on the rear panel of the instrument. You should also make sure that the power source you plugged the instrument into is energized. Then, verify that the instrument is turned on.
Chapter 2 Quick Start If the Instrument Does Not Turn On 1 Remove the power cord. Remove the fuse-holder assembly from the rear panel. 2 Remove the line-voltage selector from the assembly. 2 Fuse: 500 mAT (for all line voltages) Keysight Part Number: 2110-0458 3 Rotate the line-voltage selector until the correct voltage appears in the window. 4 Replace the fuse-holder assembly in the rear panel.
Chapter 2 Quick Start To Adjust the Carrying Handle To Adjust the Carrying Handle To adjust the position, grasp the handle by the sides and pull outward. Then, rotate the handle to the desired position.
Chapter 2 Quick Start To Rack Mount the Instrument To Rack Mount the Instrument You can mount the instrument in a standard 19-inch rack cabinet using one of three optional kits available. Instructions and mounting hardware are included with each rack-mounting kit. Any System II instrument of the same size can be rack-mounted beside the 34970A. Remove the carrying handle, and the front and rear rubber bumpers, before rack-mounting the instrument.
Chapter 2 Quick Start To Rack Mount the Instrument To rack mount a single instrument, order adapter kit 5063-9240. To rack mount two instruments side-by-side, order lock-link kit 5061-9694 and flange kit 5063-9212. Be sure to use the support rails inside the rack cabinet. To install one or two instruments in a sliding support shelf, order shelf 5063-9255, and slide kit 1494-0015 (for a single instrument, also order filler panel 5002-3999).
3 3 Front-Panel Overview
Front-Panel Overview This chapter introduces you to the front-panel keys and menu operation. This chapter does not give a detailed description of every front-panel key or menu operation. It does, however, give you a good overview of the frontpanel menu and many front-panel operations. See the Keysight 34970A User’s Guide for a complete discussion of the instrument’s capabilities and operation.
Chapter 3 Front-Panel Overview Front-Panel Menu Reference Front-Panel Menu Reference This section gives an overview of the front-panel menus. The menus are designed to automatically guide you through all parameters required to configure a particular function or operation. The remainder of this chapter shows examples of using the front-panel menus. 3 Configure the measurement parameters on the displayed channel. • Select measurement function (dc volts, ohms, etc.) on the displayed channel.
Chapter 3 Front-Panel Overview Front-Panel Menu Reference Configure the advanced measurement features on displayed channel. • Set the integration time for measurements on the displayed channel. • Set the channel-to-channel delay for scanning. • Enable/disable the thermocouple check feature (T/C measurements only). • Select the reference junction source (T/C measurements only). • Set the low frequency limit (ac measurements only). • Enable/disable offset compensation (resistance measurements only).
Chapter 3 Front-Panel Overview To Unsecure for Calibration To Unsecure for Calibration You can unsecure the instrument either from the front panel or over the remote interface. The instrument is secured when shipped from the factory and the security code is set to “HP034970”. • Once you enter a security code, that code must be used for both front-panel and remote operation. For example if you secure the instrument from the front panel, you must use that same code to unsecure it from the remote interface.
Chapter 3 Front-Panel Overview To Change the Security Code To Change the Security Code • To change the security code, you must first unsecure the instrument, and then enter a new code. Make sure you have read the security code rules described on page 67 before attempting to change the security code. • To change the security code, first make sure that the instrument is unsecured. Go to the SECURE CAL entry, enter the new security code, and press (the instrument is now secured with the new code).
Chapter 3 Front-Panel Overview To Perform a Zero Adjustment To Perform a Zero Adjustment The instrument features closed case electronic calibration. No internal mechanical adjustments are required. The instrument calculates correction factors based upon an input reference value and stores the correction factors in non-volatile memory. This procedure demonstrates making the zero adjustment from the front panel. The gain adjustments are similar. DO NOT perform this procedure before reading Chapter 4.
Chapter 3 Front-Panel Overview To Apply Mx+B Scaling to Measurements To Apply Mx+B Scaling to Measurements The scaling function allows you to apply a gain and offset to all readings on a specified multiplexer channel during a scan. In addition to setting the gain (“M”) and offset (“B”) values, you can also specify a custom measurement label for your scaled readings (RPM, PSI, etc.). 1 Configure the channel. You must configure the channel (function, transducer type, etc.) before applying any scaling values.
Chapter 3 Front-Panel Overview To Read the Relay Cycle Count To Read the Relay Cycle Count The instrument has a Relay Maintenance System to help you predict relay end-of-life. The instrument counts the cycles on each relay in the instrument and stores the total count in non-volatile memory on each switch module. You can use this feature on any of the relay modules and the internal DMM. • In addition to the channel relays, you can also query the count on backplane relays and bank relays.
Chapter 3 Front-Panel Overview To Read a Digital Input Port To Read a Digital Input Port The multifunction module (34907A) has two non-isolated 8-bit input/output ports which you can use for reading digital patterns. You can read the live status of the bits on the port or you can configure a scan to include a digital read. 1 Select the Digital Input port. Select the slot containing the multifunction module and continue turning the knob until DIN is displayed (channel 01 or 02). 2 Read the specified port.
Chapter 3 Front-Panel Overview To Write to a Digital Output Port To Write to a Digital Output Port The multifunction module (34907A) has two non-isolated 8-bit input/output ports which you can use for outputting digital patterns. 1 Select the Digital Output port. Select the slot containing the multifunction module and continue turning the knob until DIN is displayed (channel 01 or 02). 3 2 Enter the bit pattern editor. Notice that the port is now converted to an output port (DOUT).
Chapter 3 Front-Panel Overview To Read the Totalizer Count To Read the Totalizer Count The multifunction module (34907A) has a 26-bit totalizer which can count TTL pulses at a 100 kHz rate. You can manually read the totalizer count or you can configure a scan to read the count. 1 Select the totalizer channel. Select the slot containing the multifunction module and continue turning the knob until TOTALIZE (channel 03) is displayed. 2 Configure the totalize mode.
Chapter 3 Front-Panel Overview To Output a DC Voltage To Output a DC Voltage The multifunction module (34907A) has two analog outputs capable of outputting calibrated voltages between ±12 volts. 1 Select a DAC Output channel. Select the slot containing the multifunction module and continue turning the knob until DAC is displayed (channel 04 or 05). 3 2 Enter the output voltage editor. +00.000 V DAC 3 Set the desired output voltage. Use the knob and or keys to edit the individual digits. +05.
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4 4 Calibration Procedures
Calibration Procedures This chapter contains procedures for verification of the instrument’s performance and adjustment (calibration). These procedures are required only if the internal DMM is installed.
Chapter 4 Calibration Procedures Keysight Technologies Calibration Services Keysight Technologies Calibration Services When your instrument is due for calibration, contact your local Keysight Service Center for a low-cost recalibration. The 34970A is supported on automated calibration systems which allow Keysight to provide this service at competitive prices.
Chapter 4 Calibration Procedures Time Required for Calibration Time Required for Calibration The 34970A can be automatically calibrated under computer control. With computer control you can perform the complete calibration procedure and performance verification tests in less than 30 minutes once the instrument is warmed-up (see “Test Considerations” on page 71). Manual calibrations using the recommended test equipment will take approximately 2 hours.
Chapter 4 Calibration Procedures Recommended Test Equipment Recommended Test Equipment The test equipment recommended for the performance verification and adjustment procedures is listed below. If the exact instrument is not available, substitute calibration standards of equivalent accuracy. A suggested alternate method would be to use the Keysight 458A 81⁄2digit Digital Multimeter to measure less accurate yet stable sources.
Chapter 4 Calibration Procedures Input Connections Input Connections You will need an input multiplexer module to verify or adjust the internal DMM. Input connections can be made using a 34901A 20-Channel Multiplexer.
Chapter 4 Calibration Procedures Calibration Security Calibration Security This feature allows you to enter a security code to prevent accidental or unauthorized adjustments of the instrument. When you first receive your instrument, it is secured. Before you can adjust the instrument, you must unsecure it by entering the correct security code. See page 51 in Chapter 3 for a procedure to enter the security code. • The security code is set to “HP034970” when the instrument is shipped from the factory.
Chapter 4 Calibration Procedures Calibration Security To Unsecure the Instrument Without the Security Code To unsecure the instrument without the correct security code, follow the steps below. A front panel procedure to unsecure the instrument is given on page 51. See “Electrostatic Discharge (ESD) Precautions” on page 162 before beginning this procedure. Warning Warning • Exposed Mains • Do Not Touch! SHOCK HAZARD.
Chapter 4 Calibration Procedures Calibration Message Calibration Message The instrument allows you to store one message in calibration memory. For example, you can store such information as the date when the last calibration was performed, the date when the next calibration is due, the instrument’s serial number, or even the name and phone number of the person to contact for a new calibration. • You can record a calibration message only from the remote interface and only when the instrument is unsecured.
Chapter 4 Calibration Procedures Calibration Procedure Calibration Procedure The following procedure is the recommended method to complete an instrument calibration. 1 Read “Test Considerations” (page 71). 2 Unsecure the instrument for calibration (page 51). 3 Perform the verification tests to characterize the instrument (incoming data). 4 Perform the zero adjustment procedures. 5 Perform the gain adjustment procedures. Perform the verification tests to verify the adjustments (outgoing data).
Chapter 4 Calibration Procedures Test Considerations Test Considerations To ensure proper instrument operation, verify that you have selected the correct power line voltage prior to attempting any procedure in this chapter. See “If the Instrument Does Not Turn On”, on page 42. Errors may be induced by ac signals present on the input leads during a self-test. Long test leads can also act as an antenna causing pick-up of ac signals.
Chapter 4 Calibration Procedures Performance Verification Tests Performance Verification Tests Use the Performance verification Tests to verify the measurement performance of the instrument. The performance verification tests use the instrument’s specifications listed in chapter 1, “Specifications,” starting on page 15. You can perform four different levels of performance verification tests: • Self-Test A series of internal verification tests that give a high confidence that the instrument is operational.
Chapter 4 Calibration Procedures Performance Verification Tests Self-Test A brief power-on self-test occurs automatically whenever you turn on the instrument. This limited test assures that the instrument is capable of operation and also checks the plug-in cards for basic operation.
Chapter 4 Calibration Procedures Performance Verification Tests Quick Performance Check The quick performance check is a combination of internal self-test and an abbreviated performance test (specified by the letter Q in the performance verification tests). This test provides a simple method to achieve high confidence in the instrument’s ability to functionally operate and meet specifications. These tests represent the absolute minimum set of performance checks recommended following any service activity.
Chapter 4 Calibration Procedures Internal DMM Verification Tests Internal DMM Verification Tests These procedures use inputs connected to a 34901A 20-Channel Multiplexer (see page 66) installed in slot 200. Zero Offset Verification This procedure is used to check the zero offset performance of the internal DMM. Verification checks are only performed for those functions and ranges with unique offset calibration constants.
Chapter 4 Calibration Procedures Internal DMM Verification Tests Continued from previous page... 1 Select each function and range in the order shown in the table below. Before executing each test, you must press to enable reading monitoring on the selected channel (or use the ROUTe:MON command from the remote interface). Compare measurement results to the appropriate test limits shown in the table (see page 74).
Chapter 4 Calibration Procedures Internal DMM Verification Tests Gain Verification This procedure is used to check the “full scale” reading accuracy of the internal DMM. Verification checks are performed only for those functions and ranges with unique gain calibration constants. Begin verification by selecting a measuring function and range. Make sure you have read “Test Considerations” on page 71.
Chapter 4 Calibration Procedures Internal DMM Verification Tests AC VOLTS Gain Verification Test Configuration: AC Volts LF 3 HZ:SLOW (in the Advanced menu) 1 Make sure you have read “Test Considerations” on page 71. 2 Select Channel 210, set the AC VOLTS function and the 3 Hz input filter. With the slow filter selected, each measurement takes 7 seconds to complete.
Chapter 4 Calibration Procedures Internal DMM Verification Tests AC CURRENT Gain Verification Test Configuration: AC Current LF 3 HZ:SLOW (in the Advanced menu) 1 Make sure you have read “Test Considerations” on page 71. 2 Select Channel 221, set the AC CURRENT function and the 3 Hz input filter. With the slow filter selected, each measurement takes 7 seconds to complete.
Chapter 4 Calibration Procedures Optional AC Performance Verification Tests Optional AC Performance Verification Tests These tests are not intended to be performed with every calibration. They are provided as an aid for verifying additional instrument specifications. There are no adjustments for these tests; they are provided for performance verification only. Configuration: AC VOLTS LF 3 HZ:SLOW (in the Advanced menu) 1 Make sure you have read “Test Considerations” on page 71.
Chapter 4 Calibration Procedures Internal DMM Adjustments Internal DMM Adjustments You will need a 34901A 20-Channel Multiplexer to perform the following procedures (see page 66). Install the Multiplexer in slot 200. Zero Adjustment Each time you perform a zero adjustment, the Internal DMM stores a new set of offset correction constants for every measurement function and range.
Chapter 4 Calibration Procedures Internal DMM Adjustments Gain Adjustment The Internal DMM stores a single new gain correction constant each time this procedure is followed. The gain constant is computed from the calibration value entered for the calibration command and from measurements made automatically during the adjustment procedure. Most measuring functions and ranges have gain adjustment procedures. Only the 100 MΩ range does not have gain calibration procedures.
Chapter 4 Calibration Procedures Internal DMM Adjustments Valid Gain Adjustment Input Values Gain adjustment can be accomplished using the following input values. DC VOLTS 100 mV to 100 V 300 V Valid Calibration Input Values 0.9 to 1.1 x Full Scale 250 V to 303 V OHMS, OHMS 4W 100Ω to 10 MΩ 0.9 to 1.1 x Full Scale DC CURRENT 10 mA to 1 A 0.9 to 1.1 x Full Scale AC VOLTS [1] 10 mV to 100 V 300 V 0.9 to 1.
Chapter 4 Calibration Procedures Internal DMM Adjustments Gain Adjustment Procedure Adjustment for each function should be performed only in the order shown in the performance verification table. The performance verification tables used for gain adjustments start on page 77. Review the “Test Considerations” (page 71) and “Gain Adjustment Considerations” (page 82) sections before beginning this test.
Chapter 4 Calibration Procedures –10 Vdc Adjustment Procedure (Optional) –10 Vdc Adjustment Procedure (Optional) The –10 Vdc calibration electronically enhances the Internal DMM’s a-to-d converter linearity characteristic. This adjustment should ONLY be performed after servicing the A-to-D converter or replacement of the calibration RAM. You will need a 34901A 20-Channel Multiplexer to perform the following procedures (see page 66). Install the Multiplexer in slot 200.
Chapter 4 Calibration Procedures –10 Vdc Adjustment Procedure (Optional) Continued from previous page... 1 Reverse the cable connections to the calibrator to create a -10 Vdc voltage standard. You must physically reverse the cables. DO NOT switch the output polarity of the calibrator. 2 Perform a –10V DC gain calibration. Press to enter the calibration menu. Press again to begin the adjustment procedure. Be sure to allow time for thermal offsets to stabilize (usually about 1 minute).
Chapter 4 Calibration Procedures Plug-in Module Test Considerations Module Reference Plug-in Module Test Considerations For optimum performance, all test procedures should comply with the following recommendations: • Assure that the calibration ambient temperature is stable and between 18 °C and 28 °C. Ideally the calibration should be performed at 23 °C ± 1 °C. • Assure ambient relative humidity is less than 80%.
Chapter 4 Calibration Procedures Relay Verification Relay Verification There are two methods you can use to verify relays: • Read the relay cycle count. • Measure the relay contact resistance. Relay Cycle Count The instrument has a Relay Maintenance System to help you predict relay end-of-life. The instrument counts the cycles on each relay in the instrument and stores the total count in non-volatile memory on each switch module. You can use this feature on any of the relay modules and the internal DMM.
Chapter 4 Calibration Procedures Relay Verification (Optional) 34901A Relay Contact Resistance Verification Module Reference This optional procedure uses an external DMM to make 4-wire ohms measurements across the relay contacts on the 34901A. The measured resistance is the series resistance of the two relay contacts (both contacts are in the same relay). Note: Be sure to read “Plug-in Module Test Considerations” on page 87.
Chapter 4 Calibration Procedures Relay Verification Note: Connect bare copper wires (approximately 3 cm in length) to the I terminals of Channels 21 and 22 as shown below. These wires will be used to make shorts across the channels in Tests 6 through 39. Note: Be sure to probe the components at the indicated locations on the module. Probe here for L402 measurement. Probe here for F501 measurement. Probe here for F502 measurement.
Chapter 4 Calibration Procedures Relay Verification Tests 6 - 8: Module Reference Make the connections to the 34901A as shown in the diagram below. Be sure to route your wiring for proper strain relief and install the module cover. Install the 34901A in slot 200 of the 34970A. Open all channels on the module by performing a Factory Reset (press and select “Recall State”; press again and select “Factory Reset”). Configure Channel 20 as follows: DC volts, 10 volt range, and 51⁄2 digits.
Chapter 4 Calibration Procedures Relay Verification Tests 9 - 10: Open all channels on the module by performing a Factory Reset. Configure Channel 10 (module in slot 200) as follows: 4-wire ohms, 1 kΩ range, and 51⁄2 digits. Enable reading monitoring by pressing on the selected channel (or use the ROUTe:MON command). Record the 4-wire ohms measurements from the external DMM in the following table.
Chapter 4 Calibration Procedures Relay Verification ... Continued from previous page Test # Channel Closed* HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured 18 Ch 8 P2 P2 P1 P1 __________ Ohms 2.00Ω K408 19 Ch 9 P2 P2 P1 P1 __________ Ohms 2.00Ω K409 20 Ch 10 P2 P2 P1 P1 __________ Ohms 2.00Ω K410 21 Ch 11 P2 P2 P1 P1 __________ Ohms 2.00Ω K411 22 Ch 12 P2 P2 P1 P1 __________ Ohms 2.
Chapter 4 Calibration Procedures Relay Verification Tests 34 - 36: Close only channels Channels 20 and 22. Remove the 34901A from the 34970A and do not reinstall it for these tests. On connector J101, remove the jumper between pins C14 and C15 (the top jumper shown in the diagram on page 91). On the remaining jumper connected to J101 (the bottom jumper shown in the diagram), move the end of the jumper from pin C12 to pin C16; the jumper should now short pins C13 and C16 together.
Chapter 4 Calibration Procedures Relay Verification Enable reading monitoring by pressing on the selected channel (or use the ROUTe:MON command). Record the 4-wire ohms measurement from the external DMM in the following table. External DMM Ohmmeter Connections Test Channel # Configured 37 Ch 21 Tests 38 - 39: HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured P4 P4 P5 P5 __________ Ohms 2.00Ω K521 Open all channels on the module by performing a Factory Reset.
Chapter 4 Calibration Procedures Relay Verification (Optional) 34902A Relay Contact Resistance Verification This optional procedure uses an external DMM to make 4-wire ohms measurements across the relay contacts on the 34902A. The measured resistance is the series resistance of the two relay contacts (both contacts are in the same relay). Note: Be sure to read “Plug-in Module Test Considerations” on page 87.
Chapter 4 Calibration Procedures Relay Verification Module Reference Probe here for L302 and L301 measurements.
Chapter 4 Calibration Procedures Relay Verification Tests 5 - 8: Make the connections to the 34902A as shown in the diagram below. Be sure to route your wiring for proper strain relief and install the module cover. Install the 34902A in slot 200 of the 34970A. Open all channels on the module by performing a Factory Reset (press and select “Recall State”; press again and select “Factory Reset”). Configure Channel 16 as follows: DC volts, 10 volt range, and 51⁄2 digits.
Chapter 4 Calibration Procedures Relay Verification Tests 9 - 10: Enable reading monitoring by pressing on the selected channel (or use the ROUTe:MON command). Record the 4-wire ohms measurements from the external DMM in the following table. External DMM Ohmmeter Connections Test Channel # Configured 9 Ch 08 10 HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured P3 P3 P2 P2 __________ Ohms — — __________ Ohms 2.
Chapter 4 Calibration Procedures Relay Verification ... Continued from previous page External DMM Ohmmeter Connections Test # Channels Closed* HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured 16 Ch 16 & 6 P3 P3 P1 P1 __________ Ohms 2.00Ω K306 17 Ch 16 & 7 P3 P3 P1 P1 __________ Ohms 2.00Ω K307 18 Ch 16 & 8 P3 P3 P1 P1 __________ Ohms 2.00Ω K308 19 Ch 16 & 9 P3 P3 P1 P1 __________ Ohms 2.
Chapter 4 Calibration Procedures Relay Verification (Optional) 34903A Relay Contact Resistance Verification Be sure to read “Plug-in Module Test Considerations” on page 87. 2 Install the 34903A module in slot 100. Close Channels 01 through 20. Remove the module from the 34970A. 3 Measure the resistance from the CM terminal to the NO terminal on each channel. 4 Install the module in slot 100. Open Channel 01 through 20. Remove the module from the 34970A.
Chapter 4 Calibration Procedures Relay Verification (Optional) 34904A Relay Contact Resistance Verification This optional procedure uses an external DMM to make 4-wire ohms measurements across the relay contacts on the 34904A. Be sure to read “Plug-in Module Test Considerations” on page 87. Connect copper shorts from H to L on each of the eight columns (COL1 through COL8) as shown below. Connect the HI, LO, Sense HI, and Sense LO leads to ROW1 as shown below.
Chapter 4 Calibration Procedures Relay Verification Tests 1-8 (ROW1): Open all channels on the module by performing a Factory Reset (press again and select “Factory For each test, close only the channels shown in the “Channels Closed” column below (module in slot 200). Record the 4-wire ohms measurements from the external DMM in the following table. Test # Channel Closed* Measured Value Test Limit Relay Measured 1 Ch 11 & 41 ________Ohms 2.00Ω K101 2 Ch 12 & 42 ________Ohms 2.
Chapter 4 Calibration Procedures Relay Verification ...Continued from previous page Tests 9 - 16 (ROW2): Move the HI, LO, Sense HI and Sense LO leads to ROW2 as shown below. Test Lead Connections for ROW2 Press and hold down panel. until “Card Reset” is displayed on the front For each test, close only the channels shown in the “Channels Closed” column below. Record the 4-wire ohms measurements from the external DMM in the following table.
Chapter 4 Calibration Procedures Relay Verification ...Continued from previous page Module Reference Tests 17 - 24 (ROW3): Move the HI, LO, Sense HI and Sense LO leads to ROW3 as shown below. Test Lead Connections for ROW3 Press and hold down panel. until “Card Reset” is displayed on the front For each test, close only the channels shown in the “Channels Closed” column below. Record the 4-wire ohms measurements from the external DMM in the following table.
Chapter 4 Calibration Procedures Relay Verification ...Continued from previous page Tests 25 - 32 (ROW4): Move the HI, LO, Sense HI and Sense LO leads to ROW4 as shown below. Test Lead Connections for ROW4 Press and hold down panel. until “Card Reset” is displayed on the front For each test, close only the channels shown in the “Channels Closed” column below. Record the 4-wire ohms measurements from the external DMM in the following table.
Chapter 4 Calibration Procedures Relay Verification (Optional) 34905A/06A Relay Contact Resistance Verification 1 Be sure to read “Plug-in Module Test Considerations” on page 87. 2 Prepare the module by connecting an SMB short to CH10, CH11, CH12, and CH13. Connect the COM1 terminal to the DMM. Be sure to use the correct SMB connectors for the module. 3 Install the module in slot 100. 4 Close Channel 11. 5 Measure the resistance on the DMM. 6 Repeat steps 4 and 5 for Channels 12, 13, and 14.
Chapter 4 Calibration Procedures Relay Verification (Optional) 34908A Relay Contact Resistance Verification This optional procedure uses an external DMM to make 4-wire ohms measurements across the relay contacts on the 34908A. Note that when measuring the resistance of the contacts of the channels relays, the test also includes the Bank Switch. Note: Be sure to read “Plug-in Module Test Considerations” on page 87.
Chapter 4 Calibration Procedures Relay Verification Module Reference Note: Be sure to probe from the right-hand side of the inductor.
Chapter 4 Calibration Procedures Relay Verification Tests 2 - 3: Make the connections to the 34908A as shown in the diagram below. Be sure to route your wiring for proper strain relief and install the module cover. Install the 34908A in slot 200 of the 34970A. Open all channels on the module by performing a Factory Reset (press and select “Recall State”; press again and select “Factory Reset”). Configure Channel 01 as follows: DC volts, 10 volt range, and 51⁄2 digits.
Chapter 4 Calibration Procedures Relay Verification Tests 4 - 43: Module Reference Make the connections to the 34908A as shown in the diagram below. Connect copper shorts between all channels as shown. Be sure to route your wiring for proper strain relief and install the module cover. Install the 34908A in slot 200 of the 34970A.
Chapter 4 Calibration Procedures Relay Verification External DMM Ohmmeter Connections Test Channels # Closed* HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured 4 Ch 1 H Com L Com H Com L Com __________ Ohms 2.00Ω K401, K422 5 Ch 2 H Com L Com H Com L Com __________ Ohms 2.00Ω K402, K422 6 Ch 3 H Com L Com H Com L Com __________ Ohms 2.00Ω K403, K422 7 Ch 4 H Com L Com H Com L Com __________ Ohms 2.
Chapter 4 Calibration Procedures Relay Verification ... Continued from previous page Test Channels # Closed* HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured 24 Ch 21 H Com L Com H Com L Com __________ Ohms 2.00Ω K401, K422 25 Ch 22 H Com L Com H Com L Com __________ Ohms 2.00Ω K402, K422 26 Ch 23 H Com L Com H Com L Com __________ Ohms 2.00Ω K403, K422 27 Ch 24 H Com L Com H Com L Com __________ Ohms 2.
Chapter 4 Calibration Procedures Thermocouple Reference Junction (Optional) Thermocouple Reference Junction (Optional) Note: You should perform these verification and adjustments if you are using the modules for thermocouple measurements. To make a thermocouple measurement a known reference junction temperature measurement must be made. The reference junction temperature is measured by two solid state temperature sensors in the input connection area on the module.
Chapter 4 Calibration Procedures Thermocouple Reference Junction (Optional) Thermocouple Reference Junction Adjustments 1 Connect a 10 kΩ (YSI 44031) thermistor to each of the following channels (a kit of five thermistors is available as Keysight part number 34308A): For the 34901AChannels 6 and 17 For the 34902AChannels 6 and 11 For the 34908AChannels 6 and 16 Keep the thermistor leads as short as possible. Locate the thermistor as near to the input connectors as possible.
Chapter 4 Calibration Procedures 34907A Analog Output 34907A Analog Output Analog Output Verification Test This procedure is used to check the calibration of the analog outputs on the 34907A Multifunction Module. Install the module in slot 200. Verification checks are performed only for those output values with unique calibration constants. 1 Make connections to analog output channels as shown below. To DMM 34907A To DMM 2 For each analog output, set each output value in the table below.
Chapter 4 Calibration Procedures 34907A Analog Output Analog Output Adjustment Module Reference Note: Install the 34907A module in the mainframe and allow a 45 minute warm-up before performing these procedures. This adjustment procedure sets a zero adjustment and a gain adjustment constant for each DAC output. You must perform all the adjustments on one analog output channel before adjusting the other analog output channel. 1 Install the module in slot 100. Select the first analog output channel (104).
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5 5 Theory of Operation
Theory of Operation This chapter is organized to provide descriptions of the circuitry contained on each schematic shown in chapter 8. A block diagram overview is provided followed by more detailed descriptions of the circuitry contained in the schematics chapter.
Chapter 5 Theory of Operation System Block Diagram System Block Diagram A simplified block diagram is shown below. A detailed system block diagram is shown on page 221. Not all systems have an Internal DMM. In these systems, the internal DMM connections to the analog bus and the floating logic are left open. The major portions of each block are described in the following sections.
Chapter 5 Theory of Operation Floating Logic Floating Logic Unless otherwise noted, components in this discussion are located on the A1 circuit assembly (34970-66501). The schematics are included in Chapter 8 starting on page 224. The floating common logic controls the operation of the entire instrument. All measurement control and remote interface command interpretation is performed in the main controller, U205.
Chapter 5 Theory of Operation Floating Logic The main controller, U205, is a 16-bit microcontroller incorporating many built-in features: • A 10-bit, successive approximation ADC with selectable inputs is used to convert two signals: FLASH and FRQRNG. The FLASH signal is the residual charge on the main integrating ADC output from the internal DMM assembly (A4). The FRQRNG signal (also from the internal DMM) is used to make voltage ranging decisions for frequency and period measurements.
Chapter 5 Theory of Operation Floating Logic The custom ASIC, U209, provides: • Memory Address mapping – The main controller multiplexes address and data on the same bus. U209 latches the address and drives a separate memory address bus (MA(19:1)). U209 allows the main controller to access a much larger memory space than its 16-bit address bus would allow. It also partitions memory into separate data and instruction segments and a “mappable” segment that can be used for either data or instructions.
Chapter 5 Theory of Operation Memory Memory Unless otherwise noted, components in this discussion are located on the A1 circuit assembly (34970-66501). The schematics are included in Chapter 8 starting on page 224. The main controller, U205, uses 512 Kbytes of ROM and 544 Kbytes of RAM. ASIC U209 provides the memory mapping that allows access to this large memory space.
Chapter 5 Theory of Operation Earth-Referenced Logic Earth-Referenced Logic Unless otherwise noted, components in this discussion are located on the A1 circuit assembly (34970-66501). The schematics are included in Chapter 8 starting on page 224. The earth-referenced logic circuits provide all rear panel input/output capability. Microprocessor U305 handles GPIB (IEEE-488) control through bus interface chip U309 and bus receiver/driver chips U310 and U311.
Chapter 5 Theory of Operation Power Supplies Power Supplies Unless otherwise noted, components in this discussion are located on the A1 circuit assembly (34970-66501). The schematics are included in Chapter 8 starting on page 224. The instrument uses two types of power supplies: floating supplies and earth referenced supplies. The floating supply outputs are ±18 Vdc, +5 Vdc, and a 6 Vrms center tapped filament supply for the vacuum fluorescent display.
Chapter 5 Theory of Operation Power Supplies The 5 volt earth referenced supply (+5V_ER) is produced by rectifier CR101, CR102, CR103, CR104, and regulator U101. This supply is earth referenced by the screw which mounts the PC board to the instrument chassis. The unswitched +5V_ER supplies U305, U303, U320, and U302.
Chapter 5 Theory of Operation Front Panel Front Panel Unless otherwise noted, components in this discussion are located on the A2 circuit assembly (34970-66502). The schematics are included in Chapter 8 starting on page 229. The front-panel circuits consist of vacuum fluorescent display control, display high voltage drivers, and keyboard scanning. Communication between the front panel and floating logic circuits is accomplished through a 2-wire bi-directional serial interface.
Chapter 5 Theory of Operation Backplane Backplane Unless otherwise noted, components in this discussion are located on the A3 circuit assembly (34970-66503). The schematics are included in Chapter 8 starting on page 231. The backplane contains three connectors, P101, P102, and P103 for connection to the plug-in modules. The parallel lines in these connectors are divided into two groups to form the analog bus and digital bus.
Chapter 5 Theory of Operation Internal DMM Internal DMM DMM Block Diagram The internal DMM block diagram is shown on the system block diagram on page 221. A portion of the block diagram is shown below.
Chapter 5 Theory of Operation Internal DMM Input Unless otherwise noted, components in this discussion are located on the A4 circuit assembly (34970-66504). The schematics are included in Chapter 8 starting on page 234. The purpose of the Input section is to connect the Input HI terminal to the various measuring functions. This is accomplished through K102, K103, and K104. Additionally, connections are made for the 4-wire ohms HI Sense and LO Sense inputs.
Chapter 5 Theory of Operation Internal DMM Input Amplifier Unless otherwise noted, components in this discussion are located on the A4 circuit assembly (34970-66504). The schematics are included in Chapter 8 starting on page 234. The DC Amplifier circuit is used by every measuring function except frequency and period. Analog switch U101B selects various input signals for measurement by the ADC.
Chapter 5 Theory of Operation Internal DMM In the DC current function, a current is applied between the Input I and LO terminals. Ranging is accomplished by relay K102 and amplifier gain switching in U101. Since a known resistor (the shunt resister) is connected between these terminals, a voltage proportional to the unknown current is generated. The voltage sensed at R121 is measured by the multimeter’s dc circuitry. The table below illustrates the dc current measuring function configurations.
Chapter 5 Theory of Operation Internal DMM Ohms Current Source Unless otherwise noted, components in this discussion are located on the A4 circuit assembly (34970-66504). The schematics are included in Chapter 8 starting on page 234. The ohms current source flows from the Input HI terminal to the Input LO terminal for both the 2-wire and 4-wire ohms functions. Each current value is generated by forcing a stable, precise voltage across a stable resistance.
Chapter 5 Theory of Operation Internal DMM AC Circuit Unless otherwise noted, components in this discussion are located on the A4 circuit assembly (34970-66504). The schematics are included in Chapter 8 starting on page 234. The multimeter uses a true RMS ac-to-dc converter to measure ac voltages and currents. The ac-to-dc converter changes the input ac voltage to a dc voltage.
Chapter 5 Theory of Operation Internal DMM The programmable capacitance is implemented by varying the signal level across a compensating capacitor. In the x0.2 configuration, low frequency gain is set by R301, R302, and R304. The variable gain element U302/U303 essentially varies the value of C306 from 0 to 1 times its value in 256 steps. The exact gain constant is determined during the 50 kHz ac voltage range calibration procedure. In the x0.
Chapter 5 Theory of Operation Internal DMM A-to-D Converter Unless otherwise noted, components in this discussion are located on the A4 circuit assembly (34970-66504). The schematics are included in Chapter 8 starting on page 234. The analog-to-digital converter (ADC) is used to change dc voltages into digital information (schematic shown on page 9-12).
Chapter 5 Theory of Operation Internal DMM Each analog-to-digital conversion begins when the multimeter is triggered. The ADC starts by clearing the integrator slope count in A1U209. At the end of the integration period, the slope count is latched. The slope count provides the most significant bits of the input voltage conversion. The least significant bits are converted by the on-chip ADC of CPU A1U205. The instrument precision voltage reference is U403.
Chapter 5 Theory of Operation Switch Modules Switch Modules In general, all the switch modules share a common module control circuitry. This circuitry is described below. Each module is described in further detail on the following pages.
Chapter 5 Theory of Operation Switch Modules In addition to the +5 Volt power supply (Vcc) and ground, the module controller uses four lines for control and communication: • RESET, from the Earth Referenced Logic A1U305. RESET is common to all three slots. The module controller performs a reset when this line goes high. Reset conditions vary for each plug-in. Module Reference • SRQ, to the Earth Referenced Logic A1U305. The SRQ line is a wired-OR line that can be driven by any plug-in.
Chapter 5 Theory of Operation Switch Modules U101 controls the relays on the module using an 8-bit data bus and three control lines. The data lines are latched and applied to the relay drivers. U101 enters a low-power idle mode when inactive. U101 responds when a command is received or when a scheduled reference junction temperature measurement is taken. The relays use a buffered +5 Volt power supply.
Chapter 5 Theory of Operation Switch Modules The non-latching relay contacts are in the set position (closed) when current flows through the coil. When the current is removed, the relay resets (opens). The positive side of the relay coil is connected to +5NL. The negative side of the relay coil is connected to ZGND through a single NPN transistor. The transistor and +5NL must be on for the relay to stay in the set position.
Chapter 5 Theory of Operation Switch Modules 34901A Components in this discussion are located on the A1 circuit assembly (34901-66501). The schematics are included in Chapter 8 starting on page 239. The control circuitry has four groupings of latches, relay drivers and relays. The three control lines (SEL_A, SEL_B, and SEL_C) from the module controller are divided into five control lines by the binary to octal converter U109. The row latch, U102, and column latches, U103 and U104, control the relays.
Chapter 5 Theory of Operation Switch Modules The 20 channels are divided into two banks. The banks are combined by closing K422 for voltage and 2-wire Ohms switching. When K422 is open, the banks are electrically independent of each other and this configuration is used for 4-wire Ohms multiplexing where the Ohms current sources are connected to channels 1 through 10 and the sense is obtained from channels 11 through 20.
Chapter 5 Theory of Operation Switch Modules 34902A Components in this discussion are located on the A1 circuit assembly (34902-66501). The schematics are included in Chapter 8 starting on page 245. The control circuitry has of two groupings of latches, relay drivers and relays. The 16 voltage and resistance measurement channels are directly driven. Tree switching controls the 2-wire/4-wire Ohms operation and connections to the analog bus.
Chapter 5 Theory of Operation Switch Modules The 16 channels are divided into two banks. The banks are combined by closing K327 for voltage and 2-wire Ohms switching. When K327 is open, the banks are electrically independent of each other and this configuration is used for 4-wire Ohms multiplexing where the Ohms current source is connected to channels 1 through 8 and the sense is obtained from channels 9 through 16.
Chapter 5 Theory of Operation Switch Modules 34903A Components in this discussion are located on the A1 circuit assembly (34903-66501). The schematics are included in Chapter 8 starting on page 250. The control circuitry has two grouping of latches, relay drivers and relays. The 20 channels are, for control purposes, arranged into 8 rows by 10 columns. The row latch, U102, and column latches, U103 and U104, control the relays. The row drivers are divided into four groups of set and reset drivers.
Chapter 5 Theory of Operation Switch Modules 34904A Components in this discussion are located on the A1 circuit assembly (34904-66501). The schematics are included in Chapter 8 starting on page 254. The control circuitry has four groupings of latches, relay drivers and relays divided into 4 rows by 8 columns. Module Reference 5 The row latch, U102, and column latch U103, control the relays. The row drivers are divided into four groups of set and reset drivers.
Chapter 5 Theory of Operation Switch Modules 34905A/34906A Components in this discussion are located on the A1 circuit assembly (34905-66501 or 34906-66501). The schematics are included in Chapter 8 starting on page 258. The control circuitry has of two grouping of buffers, relay drivers and relays, one for each multiplexer bank. Bank1 latch, U102, and Bank2 latch, U103, control the relays. The bank drivers are divided into six groups of set and reset drivers. Each set and reset driver controls one relay.
Chapter 5 Theory of Operation Switch Modules 34908A Components in this discussion are located on the A1 circuit assembly (34908-66501). The schematics are included in Chapter 8 starting on page 267. Module Reference The control circuitry has three grouping of latches, relay drivers and relays. The 40 voltage and resistance measurement channels are, for control purposes, arranged into 8 rows by 10 columns. Tree switching controls bank selection and connections to the analog bus.
Chapter 5 Theory of Operation Switch Modules A single relay is used to switch two input channels. The choice of which channel is connected to the common is performed by relay K422. Channels are paired 20 channels apart (Ch 1 with Ch 21, Ch 2 with Ch 22, etc.) Relay K421 connects the common to the backplane analog bus for use with the internal DMM.
Chapter 5 Theory of Operation Multifunction Module Multifunction Module The 34907A Multifunction module contains two 8-bit digital input/ output ports, a totalizer input, and two 16-bit analog outputs. Multifunction Control Module Reference Components in this discussion are located on the A1 circuit assembly (34907-66501). The schematics are included in Chapter 8 starting on page 261. A simplified block of the module control circuit is shown below.
Chapter 5 Theory of Operation Multifunction Module In addition to the +5 Volt power supply (Vcc) and ground, the module controller uses four lines for control and communication: • RESET, from the Earth Referenced Logic A1U305. RESET is common to all three slots. The module controller performs a reset when this line goes high. Reset conditions vary for each plug-in. • SRQ, to the Earth Referenced Logic A1U305. The SRQ line is a wired-OR line that can be driven by any plug-in.
Chapter 5 Theory of Operation Multifunction Module Totalizer Components in this discussion are located on the A1 circuit assembly (34907-66501). The schematics are included in Chapter 8 starting on page 261. A simplified block diagram of the totalizer input is shown below. Module Reference 5 The totalizer counts signals connected to the COUNT+ and COUNT– inputs. Two op-amps, U108A and U108B, are used for input signal conditioning.
Chapter 5 Theory of Operation Multifunction Module Analog Output Components in this discussion are located on the A1 circuit assembly (34907-66501). The schematics are included in Chapter 8 starting on page 261. A simplified block diagram of the analog output channels is shown below. Communication with each DAC (U503 and U504) is via three lines: SERSTB, DACCLK, and SERDAT. Each DAC has a voltage output of ±3 V. U505 and U506 amplify this voltage to the ±12V output.
Chapter 5 Theory of Operation Multifunction Module Digital I/O Components in this discussion are located on the A1 circuit assembly (34907-66501). The schematics are included in Chapter 8 starting on page 261. A simplified diagram of a digital I/O channel is shown below. Module Reference 5 Two stages of latches on the outputs and one set of latches on the inputs provide synchronous 16 bit writes and reads of the digital ports.
Chapter 5 Theory of Operation Multifunction Module The 74HC240’s, U205 and U206, provide the output high drive current necessary to maintain a TTL high output level ( ≥ 2.4 Vdc) under load. At instrument turn-on, following a reset, and whenever the data lines are being read, the MOSFETs are in the passive high state, and the high output drivers are disabled.
6 6 Service
Service This chapter discusses the procedures involved for returning a failed instrument to Keysight for service or repair.
Chapter 6 Service Operating Checklist Operating Checklist Before returning your instrument to Keysight Technologies for service or repair check the following items: Is the instrument inoperative? • Verify that the ac power cord is connected to the instrument. • Verify that the front-panel On/Standby switch has been pushed. • Verify that the power-line fuse is installed and not open (see page 42). The instrument is shipped from the factory with a 500 mAT, 250 V fuse.
Chapter 6 Service Types of Service Available Types of Service Available If your instrument or plug-in module fails during the warranty period (within one year of original purchase), Keysight will replace the unit free of charge. After your warranty expires, Keysight will replace the unit at a competitive price. The replacement units are fully refurbished and are shipped with new calibration certificates. Note: Each replacement unit has its own serial number.
Chapter 6 Service Repackaging for Shipment Repackaging for Shipment If the unit is to be shipped to Keysight for service or repair, be sure to: • Attach a tag to the unit identifying the owner and indicating the required service or repair. Include the instrument model number and your full serial number. • Place the unit in its original container with appropriate packaging material. • Secure the container with strong tape or metal bands.
Chapter 6 Service Electrostatic Discharge (ESD) Precautions Electrostatic Discharge (ESD) Precautions Almost all electrical components can be damaged by electrostatic discharge (ESD) during handling. Component damage can occur at electrostatic discharge voltages as low as 50 volts. The following guidelines will help prevent ESD damage when servicing the instrument or any electronic device. • Disassemble instruments only in a static-free work area. • Use a conductive work area to dissipate static charge.
Chapter 6 Service To Replace the Power-Line Fuse To Replace the Power-Line Fuse The power-line fuse is located on the rear panel of the instrument, near the power line connector. A procedure to replace the fuse is given on page 42. Use a 500 mAT, 250 V fuse for all power line settings. Troubleshooting Hints This section provides a brief check list of common failures. Before troubleshooting or repairing the instrument, make sure the failure is in the instrument rather than any external connections.
Chapter 6 Service Troubleshooting Hints Unit Reports Error 705 This error may be produced if you accidentally turn off power to the unit during a calibration or while changing a non-volatile state of the instrument. Recalibration or resetting the state should clear the error. If the error persists, a hardware failure may have occurred. Isolating to an Assembly • Remove all plug-in modules to isolate between the instrument and the plug-in modules. • Listen for a beep when you press the On/Standby switch.
Chapter 6 Service Troubleshooting Hints Power Supplies Verify the power supplies generated on the 34970-66501 circuit board. The front panel filament voltage, + 5 V backplane and +5 V fan are switched by the On/Standby switch. All other power supplies operate whenever the AC power cord is connected. Warning • Exposed Mains • Do Not Touch To check the power supplies, remove the instrument cover as shown on page 174. The power supplies can be checked from the bottom of the instrument as shown below.
Chapter 6 Service Troubleshooting Hints Power Supplies (continued) The A1 power supplies are tabulated below. Power Supply Minimum Maximum Switched +5 Earth Ref. 4.75 V 5.25 V No +5 Backplane and Fan 4.75 V 5.25 V Yes +5 Floating 4.75 V 5.25 V No +18 Floating 17.6 V 19.9 V No -18 Floating -19.0 V -16.8 V No 6 Vrms Filament Yes • Check that the input to the supply voltage regulator is at least 1 V greater than its output.
Chapter 6 Service Self-Test Procedures Self-Test Procedures Power-On Self-Test Each time the instrument is powered on, a small set of self-tests are performed. These tests check that the minimum set of logic and measurement hardware are functioning properly. Any plug-in modules installed are verified for two-way communication with the main controller. Complete Self-Test Hold down any front panel key for 5 seconds while turning on the power to perform a complete self-test.
Chapter 6 Service Self-Test Procedures Self-Tests A complete self-test performs the following tests. A failing test is indicated by the test number and description in the display. 601 Front panel not responding The main CPU A1U205 attempts to establish serial communications with the front panel processor A2U1. During this test, A2U1 turns on all display segments. Communication must function in both directions for this test to pass.
Chapter 6 Service Self-Test Procedures 608 Serial configuration readback failed This test re-sends the last 9 byte serial configuration data to all the serial path. The data is then clocked back into A1U209 and compared against the original 9 bytes sent. A failure occurs if the data do not match. 609 DC gain x1 failed This test configures for the 10 V range. The dc amplifier gain is set to X1. The measure customer (MC) input is connected to the internal TSENSE source which produces 0.6 volts.
Chapter 6 Service Self-Test Procedures 615 Ohms 10 µA source failed This test configures the 10 V range with the internal internal 10 M 100:1 divider A4U102 connected across the input. The 10 µA current source is connected. A 20 ms ADC measurement is performed and the result is checked against a limit of 7.5 V ± 3 V. 616 DC current sense failed This test configures the 1 A dc rage and function. A 20 ms ADC measurement is performed and the result is checked against a limit of 0 A ± 5 A.
Chapter 6 Service Self-Test Procedures 622 Frequency counter failed This test configures for the 100 mV ac range. This test immediately follows test 621. With A4C301 holding charge from test 621 the ac input is now switched to ground through A4K103. This produces a positive pulse on the input to the frequency comparator A4U310. While C301 discharges, the ENAB FREQ bit is toggled four times to produce a frequency input to the counter logic in A1U205.
Chapter 6 Service Battery Check and Replacement Battery Check and Replacement The internal battery, A1BT101, provides power to the internal real-time clock, stored states, and reading storage memory whenever ac line power is removed. Note: The internal battery state does not affect the calibration memory. The battery has an expected life of approximately 4 years. Battery life will be reduced if the instrument is stored for prolonged periods at temperatures above 40 °C with the ac power removed.
Chapter 6 Service Battery Check and Replacement To Verify the Battery 1 Remove AC line power (this also provides a load on A1BT101). 2 Remove the cover (see page 174). 3 Measure the battery voltage as shown. Replace the battery if the voltage is below 2.7 V. Battery – Battery + 6 To Replace the Battery 1 Remove AC line power. 2 Remove the cover (see page 174). If installed, remove the Internal DMM (A4) assembly (see page 176).
Chapter 6 Service Disassembly Disassembly The following tools are recommended for disassembly. • T15 Torx® driver (all screws) • 11 mm nut driver (front-panel disassembly) • 5 mm nut driver (rear-panel connectors) Tighten the fan screws to a maximum of 6 in/lbs (0.68 newton/meter). WARNING SHOCK HAZARD. Only service-trained personnel who are aware of the hazards involved should remove the instrument covers. Dangerous voltages may be encountered with the instrument covers removed.
Chapter 6 Service Disassembly General Disassembly 1 2 3 4 6 175
Chapter 6 Service Disassembly Internal DMM Disassembly 1 2 3 176
Chapter 6 Service Disassembly Front-Panel Disassembly 1 2 3 6 Maximum Torque: 6 in/lbs (0.68 n/m) Note: When reassembling the front panel, be sure to route the front-panel cable as shown above. Do not allow the front-panel cable to touch the digital ribbon cable.
Chapter 6 Service Disassembly Additional Chassis Disassembly 1 2 178
Chapter 6 Service Disassembly Plug-In Module Disassembly Needle-nose Pliers 6 179
180
7 7 Replaceable Parts
Replaceable Parts This chapter contains information ordering replacement parts for your instrument. The parts lists are divided into the following groups.
Chapter 7 Replaceable Parts 34970A Mainframe 34970A Mainframe Reference Designator A1 A2 A3 A4 CBL1 CBL2 CBL3 CVR1 Part Number 34970-66501 34970-66502 34970-66503 34970-66504 34970-80010 34970-61606 RS232-61601 8120-1378 34970-84101 1 1 1 1 1 1 1 1 1 PCA-DIGITAL BD PCA-DISPLAY BD PCA-BACKPLANE BD PCA-DMM BD Internal DMM Field Kit CABLE, K-TYPE TC, SCRWDRVR CABLE, RS232, 9 PIN CBL-U.S.
Chapter 7 Replaceable Parts 34970-66501 Main PC Assembly (A1) 34970-66501 Main PC Assembly (A1) Reference Designator BT101 Part Number 1420-0860 C101 C102 C103 C104 C105-C106 C107 C108 C109 C110 C112-C116 C121 C132 C151 C160 C180-C182 C181 C183 C201 C204-C205 C209 C212-C214 C218 C219 C220 C221 C222-C223 C224 C270-C272 C290-C292 C301-C312 C313 C314 C315 C316 C317-C320 C330-C331 0180-4435 0180-4558 0160-7798 0180-4435 0180-4116 0180-4433 0180-3751 0180-4433 0180-3751 0160-5945 0180-4435 0160-7798 0180-411
Chapter 7 Replaceable Parts 34970-66501 Main PC Assembly (A1) Reference Designator C350-C351 C370 C373 C401-C409 C410 Part Number 0160-7798 0160-5947 0160-5945 0160-7798 0160-5945 CAP 0.1UF 50V 10% X7R 0805 CAP-FXD 1000pF 50 V CAP-FXD 0.01uF +-10% 50 V CER X7R CAP 0.1UF 50V 10% X7R 0805 CAP-FXD 0.
Chapter 7 Replaceable Parts 34970-66501 Main PC Assembly (A1) Reference Designator P201 P302 P303 Part Number 1251-0600 34970-61601 34970-61602 1 1 1 Mfr Code CONNECTOR-SGL CONT PIN 1.14-MM-BSC-SZ SQ 01136 CABLE, DGTL-BKPLN 03418 CABLE, RS232-DGTL 04726 928-196-004140 22-43-2060 87920-1000T Q101 Q102 Q110 Q120 1855-1101 1854-1037 1855-0926 1853-0724 1 1 1 1 TRANSISTOR-MOSFET DUAL P-CHAN E-MODE SI TRANSISTOR NPN SI TO-236AA PD=350MW FET NMOS 2X S0BN 30V 1.
Chapter 7 Replaceable Parts 34970-66501 Main PC Assembly (A1) Reference Designator R222 R251 R252-R254 R255-R259 R260 R261 R262 R270 R271-R273 R275 R277 R301-R302 R303 R304 R305-R309 R310 R311 R312 R313 R314 R315 R330-R331 R340 R350 R351-R358 R360-R362 R370 R371-R372 R373 R375 R380 R401 R403-R423 Part Number 0699-3034 0699-3058 0699-3034 0699-3058 0699-3053 0699-2965 0699-3053 0699-3001 0699-2977 0699-2983 0699-2983 0699-3034 0699-3053 0699-3034 0699-3058 0699-3034 0699-3050 0699-3034 0699-3077 0699-3035
Chapter 7 Replaceable Parts 34970-66501 Main PC Assembly (A1) Reference Designator U107 U150 U201 U204 U205 U209 U212 U213-U214 U215 U220 U301 U302 U303 U304 U305 U306 U307 U308 U309 U310 U311 U312 U320 U401 U402-U405 U410 Part Number 1826-1572 1826-2817 1818-6821 1813-0827 1821-1479 1821-2271 1820-5937 1990-1552 9164-0173 1821-3433 0410-4009 1821-0055 1990-1552 1820-7312 34970-88803 1820-7312 1820-6863 1820-6823 1822-0639 1820-6175 1820-6176 1990-1552 1820-7312 34970-88807 1818-8796 1818-5917 XU305 XU40
Chapter 7 Replaceable Parts 34970-66502 Front-Panel and Keyboard PC Assembly (A2) 34970-66502 Front-Panel and Keyboard PC Assembly (A2) Reference Designator C1 C2 C3-C13 CR1 CR2 Part Number 0180-3751 0180-4287 0160-7798 1902-1542 34970-89301 1 1 11 1 1 Mfr Code CAP-FXD 1uF +-20% 35 V TA 00039 CAP-FXD 10uF +-20% 35 V TA 05524 CAP 0.1UF 50V 10% X7R 0805 02010 DIODE-ZNR 6.
Chapter 7 Replaceable Parts 34970-66503 Backplane PC Assembly (A3) 34970-66503 Backplane PC Assembly (A3) Reference Designator C109 Part Number 0160-7438 1 CAP-FXD 0.01uF +-10% 500 V CER X7R Mfr Code 02010 E101-E102 1970-0100 2 TUBE-ELECTRON SURGE V PTCTR 11484 1970-0100 J1 1400-0977 1 CLIP BAT 05535 209 L101-L102 9140-1194 2 INDUCTOR 10NH +-10% 2.8W-MMX3.
Chapter 7 Replaceable Parts 34970-66504 Internal DMM PC Assembly (A4) 34970-66504 Internal DMM PC Assembly (A4) Reference Designator C100 C101-C103 C104 C105 C106-C107 C108 C110 C111 C113 C120 C150 C151 C152 C160 C210 C212 C301 C302 C303 C304 C305 C306 C307 C308-C310 C313 C314-C315 C316 C317 C318 C319-C320 C321 C322-C323 C324 C326 C327 C330 C350-C351 C400-C402 Part Number 0160-6839 0160-6842 0160-6497 0160-6731 0160-5967 0160-6736 0160-6497 0160-5967 0160-6497 0160-6497 0160-6497 0160-6736 0160-6731 0160-
Chapter 7 Replaceable Parts 34970-66504 Internal DMM PC Assembly (A4) Reference Designator C403-C404 C407-C408 C410 C441-C442 C443 C460 CR103 CR110-CR113 CR115 CR201 CR202 CR203 CR302-CR303 CR304-CR307 CR401-CR402 CR403-CR404 K102-K104 L101 Part Number 0160-6497 0160-6497 0160-6497 0160-6736 0699-2963 0160-6731 1902-1565 1901-1607 1902-1565 1902-1565 1901-1378 1902-1592 1906-0291 1902-1541 1902-1541 1906-0291 0490-1896 9140-1244 L102 9140-1238 L106 9140-1244 L110-L111 9140-1238 L401-L402 L404 L405-
Chapter 7 Replaceable Parts 34970-66504 Internal DMM PC Assembly (A4) Reference Designator R103 R104 R105 R112-R113 R114-R117 R118 R119 R121 R122 R123 R124 R126-R127 R130 R131 R150 R151 R170 R173 R183 R184 R196 R197 R198 R201 R202 R203-R206 R207 R290 R301-R302 R303 R304 R305 R306 R307 R308 R309 R310 R311-R312 R313 R314 Part Number 0699-1380 0699-4821 0699-3406 0699-3053 0699-2973 0699-1380 0699-2973 0699-5049 0699-1329 0699-4845 0699-3046 0699-2986 0699-3067 0699-2986 0699-3051 0699-3029 0699-4821 0699-34
Chapter 7 Replaceable Parts 34970-66504 Internal DMM PC Assembly (A4) Reference Designator R315 R316 R317 R318 R319 R320 R321 R322 R323-R324 R325-R326 R327 R398-R399 R403 R405 R406 R407-R408 R409 R420 R421 R422 R430 R440 R441 R442 R450-R451 R460-R461 RV102 Part Number 0699-1327 0699-1423 0699-1406 0699-1318 0699-1398 0699-1427 0699-1382 0699-1412 0699-1398 0699-2973 0699-1398 0699-1391 0699-1391 0699-1380 0699-1330 0699-1318 0699-1372 0699-1389 0699-1318 0699-1360 0699-1503 0699-1406 0699-1394 0699-2127 0
Chapter 7 Replaceable Parts 34970-66504 Internal DMM PC Assembly (A4) Reference Designator U201 U301 U302 U303 U304 U305 U306 U307 U308 U309 U310 Part Number 1826-2420 1826-2436 1826-2339 1826-4084 1826-1985 1826-4084 1826-1609 1827-0267 1826-2445 1820-5790 1826-1572 U311 U312 U400-U401 U402 U403 U411 U420 U450 1820-5790 1826-4084 1826-2420 1826-1991 1826-1249 1821-3334 1826-1925 1818-6821 1 IC OP AMP LP DUAL 8 PIN PLSTC-SOIC IC OP AMP WB 8 PIN PLSTC-SOIC IC; 8-BIT 16-P-SOIC CMOS IC OP AMP ANLG SINGLE
Chapter 7 Replaceable Parts 34901A 20-Channel Multiplexer 34901A 20-Channel Multiplexer Reference Designator C101-C106 C107 C109 C110 C119-C124 C125 C127 C140-C141 C145 C150 C151-C152 C160-C167 C171-C174 C201-C207 CR102 CR104 CR106 CR107 CR201-CR220 CR221-CR222 CR320-CR322 CR323-CR324 CR325 Part Number 0160-7798 0160-7708 0160-7798 0160-7828 0160-5947 0160-7845 0160-7845 0160-5945 0160-7798 0180-4545 0160-5945 0160-5967 0160-5945 0160-5945 1906-0395 1902-1574 1902-1574 1906-0291 1906-0291 1906-0395 1906-0
Chapter 7 Replaceable Parts 34901A 20-Channel Multiplexer Reference Designator K423 K521 K522-K524 Part Number 0490-1895 0490-1895 0490-1896 L101-L103 L105 L109-L115 L150 L152 L401-L402 9170-1663 9170-1584 9170-1584 9170-1584 9170-1584 9140-1638 MP1 34901-60001 Q101 Q201 Q202-Q203 Q204 Q205 Q206-Q207 Q208-Q209 Q210 Q211 Q212-Q213 Q214 Q215 Q216-Q217 Q218 Q219 Q220-Q221 Q222-Q223 Q224 Q225 Q226-Q227 Q228 Q301-Q303 Q304 Q305 Q306 Q307 Q308 1855-1101 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 18
Chapter 7 Replaceable Parts 34901A 20-Channel Multiplexer Reference Designator Q309 Q310 Q311 Q312 Q313 Q314 Q315 Q316 Q317 Q318 Q319 Part Number 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 R102-R103 R104 R105 R106-R109 R110-R112 R113 R114-R115 R117-R121 R147 R148 R149 R150-R154 R155 R158 R166-R168 R170-R180 R181 R182 R185 R201-R228 R301-R319 0699-3034 0699-3947 0699-3034 0699-3970 0699-3974 0699-3970 0699-3067 0699-2973 0699-3051 0699-30
Chapter 7 Replaceable Parts 34901A 20-Channel Multiplexer Reference Designator U141 U150 U151-U152 Part Number 1821-0055 1818-6821 1821-4861 1 1 2 IC SCHMITT-TRIG CMOS/ACT NAND QUAD 2-INP FRAM SERIAL 4K FMZ4C04-S IC INTERFACE MISC Mfr Code 02037 14543 12186 XU101 1200-1592 1 SOCKET-IC-PLCC 44-CONT SQUARE J-LEAD 01380 3-822275-1 Y101 0410-4009 1 CERO-RES 12MHZ +1-0.8% 00830 PBRC-12.
Chapter 7 Replaceable Parts 34902A 16-Channel Multiplexer 34902A 16-Channel Multiplexer Reference Designator C101-C104 C105-C112 C113 C120 C125 C127 C140-C141 C150 C151-C152 C160-C162 C212-C214 Part Number 0160-7798 0160-5967 0160-7828 0160-5947 0160-7845 0160-7845 0160-5945 0180-4545 0160-5945 0160-7708 0160-5945 CAP 0.1UF 50V 10% X7R 0805 CAP-FXD 100PF 5% 0805 CAP .1UF 16V 10% X7R CAP-FXD 1000pF 50 V CAP FXD 180PF +-5% 50 V CER COG CAP FXD 180PF +-5% 50 V CER COG CAP-FXD 0.01uF 50 V CAP-FXD 4.
Chapter 7 Replaceable Parts 34902A 16-Channel Multiplexer Reference Designator Q101 Q201-Q218 Q220 Part Number 1855-1101 1854-1053 1854-1053 1 19 TRANSISTOR TRANSISTOR NPN SI SOT-23 (TO-236AB) TRANSISTOR NPN SI SOT-23 (TO-236AB) Mfr Code 02037 12125 12125 R102-R103 R105 R106-R109 R110-R112 R113 R114 R115 R117-R135 R136-R138 R140 R141-R143 R148 R149 R150-R151 R155 R157 R160-R162 R166-R168 R170-R177 R182 R185 R401-R404 0699-3034 0699-3034 0699-3970 0699-3974 0699-3970 0699-2973 0699-3067 0699-3051 0699
Chapter 7 Replaceable Parts 34903A 20-Channel Actuator 34903A 20-Channel Actuator Reference Designator C101-C104 C107 C110 C116-C118 C120-C127 C140-C141 C150 C201-C207 Part Number 0160-7798 0160-5947 0160-7798 0160-5947 0160-5967 0160-5945 0180-4545 0160-5945 CAP 0.1UF +-10% 50V CER X7R CAP-FXD 1000pF 50 V CAP 0.1UF +-10% 50V CER X7R CAP-FXD 1000pF 50 V CAP-FXD 100pF +-5% 50 V CER C0G CAP-FXD 0.01uF 50 V CAP-FXD 4.7uF +-20% 20 V TA CAP-FXD 0.
Chapter 7 Replaceable Parts 34903A 20-Channel Actuator Reference Designator Q215 Q216-Q217 Q218 Q219 Q220-Q221 Q222-Q223 Q224 Q225 Q226-Q227 Q228 Part Number 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 TRANSISTOR NPN SI SOT-23 (TO-236AB) TRANSISTOR PNP SI TO-236AA PD=200MW TRANSISTOR NPN SI SOT-23 (TO-236AB) TRANSISTOR PNP SI TO-236AA PD=200MW TRANSISTOR NPN SI SOT-23 (TO-236AB) TRANSISTOR PNP SI TO-236AA PD=200MW TRANSISTOR NPN SI SOT-23 (TO-236AB)
Chapter 7 Replaceable Parts 34904A 4x8 Matrix 34904A 4x8 Matrix Reference Designator C140 C151 C154-C157 C158 C164-C165 C166 C201-C207 Part Number 0160-7798 0160-5947 0160-5945 0180-4545 0160-5967 0160-5945 0160-5945 1 1 12 1 2 CAP 0.1UF 50V 10% X7R 0805 CAP-FXD 1000pF 50 V CAP-FXD 0.01uF 50 V CAP-FXD 4.7uF +-20% 20 V TA CF 100PF 5% 0805 CAP-FXD 0.01uF 50 V CAP-FXD 0.
Chapter 7 Replaceable Parts 34904A 4x8 Matrix Reference Designator Q213 Q221 Q223 Q231 Q233 Q241 Q243 Q251 Q253 Q261 Q263 Q271 Q273 Q281 Q283 Part Number 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 R111 R113 R121 R123 R131 R133 R141 R143 R147 R148 R149 R151-R152 R154 R155 R156-R158 R160-R163 R164-R165 R166-R168 R211 R213 R221 R223 R231 R233 0699-3051 0699-3051 0699-3051 0699-3051 0699-3051 0699-3051
Chapter 7 Replaceable Parts 34904A 4x8 Matrix Reference Designator R241 R243 R251 R253 R261 R263 R271 R273 R281 R283-R284 R287 Part Number 0699-3051 0699-3051 0699-3051 0699-3051 0699-3051 0699-3051 0699-3051 0699-3051 0699-3051 0699-3051 0699-3051 RESISTOR 10K +-1% .1W TKF TC=0+-100 RESISTOR 10K +-1% .1W TKF TC=0+-100 RESISTOR 10K +-1% .1W TKF TC=0+-100 RESISTOR 10K +-1% .1W TKF TC=0+-100 RESISTOR 10K +-1% .1W TKF TC=0+-100 RESISTOR 10K +-1% .1W TKF TC=0+-100 RESISTOR 10K +-1% .
Chapter 7 Replaceable Parts 34905A/34906A RF Multiplexer 34905A/34906A RF Multiplexer Reference Designator C101-C103 C111 C140 C151 C158 C164-C165 C166 C201-C204 CR102 CR170 Part Number 0160-5945 0160-5945 0160-7798 0160-5947 0180-4545 0160-5967 0160-5945 0160-5945 1906-0291 1906-0395 1 1 CAP-FXD 0.01uF 50 V CAP-FXD 0.01uF 50 V CAP 0.1UF 50V 10% X7R 0805 CAP-FXD 1000pF 50 V CAP-FXD 4.7uF +-20% 20 V TA CF 100PF 5% 0805 CAP-FXD 0.01uF 50 V CAP-FXD 0.
Chapter 7 Replaceable Parts 34905A/34906A RF Multiplexer Reference Designator Q201 Q202 Q203 Q204 Q205 Q206 Q207 Q208 Q209 Q210 Q211 Q212 Q231-Q254 Part Number 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1853-0525 TRANSISTOR NPN SI SOT-23 (TO-236AB) TRANSISTOR PNP SI TO-236AA PD=200MW TRANSISTOR NPN SI SOT-23 (TO-236AB) TRANSISTOR PNP SI TO-236AA PD=200MW TRANSISTOR NPN SI SOT-23 (TO-236AB) TRANSISTOR PNP SI TO-236AA PD=200MW TRA
Chapter 7 Replaceable Parts 34907A Multifunction Module 34907A Multifunction Module Reference Designator C101-C102 C103 C104-C105 C106-C108 C110-C112 C120 C140 C150 C203 C204 C205 C206-C207 C208 C211-C214 C301 C302 C401 C402 C502-C505 C506 C507-C508 C510 C511 C512 C513-C514 C515-C516 C520 C521 C522 C523-C524 C531 C532 C533 C534 C550-C551 C552 Part Number 0160-7798 0160-5945 0160-7798 0160-5945 0160-5967 0160-5947 0160-7798 0180-4545 0160-5945 0160-7798 0160-5945 0160-7798 0180-4287 0160-5967 0160-7798 016
Chapter 7 Replaceable Parts 34907A Multifunction Module Reference Designator CR101-CR106 CR110 CR301-CR308 CR401-CR408 CR501-CR504 CR505-CR506 CR507 CR510-CR511 CR520-CR521 CR530 CR531 Part Number 1906-0358 1906-0291 1906-0358 1906-0358 1901-1386 1902-1643 1901-1582 1901-1332 1906-0291 1901-1348 1906-0291 DIODE-DUAL 100V 100MA TO-236AB (SOT-23) DIODE-DUAL 70V 100MA T0-236AA DIODE-DUAL 100V 100MA TO-236AB (SOT-23) DIODE-DUAL 100V 100MA TO-236AB (SOT-23) DIO SI PN SOT23 100V 750MA BAS78B DIODE-ZNR 15V PD=1
Chapter 7 Replaceable Parts 34907A Multifunction Module Reference Designator R108 R109 R110-R111 R112 R113 R114 R115 R116 R117 R118 R119 R120-R123 R124 R125-R128 R129 R130-R133 R134-R135 R140 R141 R148 R151-R153 R166-R168 R205 R211-R214 R215-R216 R301 R302 R501 R502 R503 R504 R505-R506 R510 R511 R512 R513 R514 R518 R531-R534 R550-R551 Part Number 0699-3053 0699-3051 0699-2973 0699-3053 0699-3070 0699-3044 0699-3052 0699-2997 0699-3052 0699-3044 0699-2986 0699-1319 0699-3008 0699-1319 0699-3008 0699-1319 0
Chapter 7 Replaceable Parts 34907A Multifunction Module Reference Designator R552 R553-R556 Part Number 0699-3061 0699-1319 RP101-RP102 RP104-RP105 RP201-RP204 RP301-RP302 RP303-RP304 RP305-RP306 RP307-RP308 RP401-RP402 RP403-RP404 RP405-RP406 RP407-RP408 1810-1580 1810-1580 1810-1831 1810-1660 1810-1580 1810-1521 1810-1580 1810-1660 1810-1580 1810-1521 1810-1580 U101 U102 U103 U104 U105-U106 U107 U108 U109 U110 U111 U201-U204 U205-U206 U301-U302 U401-U402 U502 U503-U504 U505-U506 U510 34907-88811 181
Chapter 7 Replaceable Parts 34908A 40-Channel Multiplexer 34908A 40-Channel Multiplexer Reference Designator C101-C106 C107 C109 C110 C119-C123 C125 C127 C140-C141 C145 C150 C151-C152 C201-C208 C209 Part Number 0160-7798 0160-7708 0160-7798 0160-7828 0160-5947 0160-7845 0160-7845 0160-5945 0160-7798 0180-4545 0160-5945 0160-5945 0160-7798 CAP 0.1UF 50V 10% X7R 0805 CAP-FXD 1000pF +-5% 50 V CER C0G CAP 0.1UF 50V 10% X7R 0805 CAP .
Chapter 7 Replaceable Parts 34908A 40-Channel Multiplexer Reference Designator MP1 Part Qty Part Description Number 34901-60001 KIT, MODULE COVER, CASE Mfr Code 02362 34901-60001 Q101 Q201 Q202-Q203 Q204 Q205 Q206-Q207 Q208-Q209 Q210 Q211 Q212-Q213 Q214 Q215 Q216-Q217 Q218 Q219 Q220-Q221 Q222-Q223 Q224 Q225 Q226-Q227 Q228 Q229 Q230 Q231 Q232 Q233 1855-1101 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-1053 1853-0525 1854-10
Chapter 7 Replaceable Parts 34908A 40-Channel Multiplexer Reference Designator R154 R156 R166-R168 R170-R180 R181 R182 R185 R201-R233 U101 U102-U105 U109 U141 U150 U151-U152 Part Number 0699-3947 0699-3947 0699-3034 0699-3044 0699-3034 0699-3932 0699-3932 0699-3051 34901-88822 1820-5752 1820-5941 1821-0055 1818-6821 1821-2382 1 4 1 1 1 2 RESISTOR 1K +-1% .063W TKF TC=0+-200 RESISTOR 1K +-1% .063W TKF TC=0+-200 RESISTOR 1K +-1% .1W TKF TC=0+-100 RESISTOR 4.64K +-1% .1W TKF TC=0+-100 RESISTOR 1K +-1% .
Chapter 7 Replaceable Parts Manufacturer’s List Manufacturer’s List Mfr Code Mfr Name City State Country CA US 00039 NEC ELECTRONICS INC MTN VIEW 00746 ROHM CORP KYOTO 615 00830 KYOCERA AMERICA, INC SAN DIEGO CA US 01380 AMP INC HARRISBURG PA US 01542 DIV 01 SAN JOSE COMPONENTS SAN JOSE CA US JP 01642 SONS TOOL INC WOODVILLE WI US 01698 TEXAS INSTRUMENTS INC DALLAS TX US 01850 AROMAT CORP MOUNTAINSIDE NJ US 02010 AVX CORP GREAT NECK NY US 02037 MOTOROLA INC
Chapter 7 Replaceable Parts Manufacturer’s List Mfr Code State Country 04733 BELL INDUSTRIES INC MILLER JW DIV Mfr Name GARDENA City CA US 05176 AMERICAN SHIZUKI CORP CANOGA PARK CA US 05524 VISHAY INTERTECHNOLOGY INC MALVERN PA US 05525 ELCO CORP NEWPORT BEACH CA US 05535 KEYSTONE ELECTRONICS CORP NEW YORK NY US 05951 WICKMANN-WERKE A G WITTEN-ANNEN DE 06121 SIEMENS AG MUNICH DE 06337 PHILIPS ELECTRONICS NV EINDHOVEN NL 06352 TDK CORPORATION OF AMERICA SKOKIE 06
Chapter 7 Replaceable Parts Manufacturer’s List 218
8 8 Schematics
Schematics This chapter contains a block diagram, schematics, and component locator drawings for the instrument and all plug-in modules. The block diagram and schematics support the Theory of Operation in chapter 5.
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here Keysight 34970A System Block Diagram 221 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34970-66501 (sheet 1 of 2) A1 Component Locator (top) 222 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34970-66501 (sheet 2 of 2) A1 Component Locator (bottom) 223 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34970-66501 (sheet 1 of 4) A1 Power Supply Schematic 224 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34970-66501 (sheet 2 of 4) A1 Floating Logic Schematic 225 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34970-66501 (sheet 3 of 4) A1 Earth Referenced Logic Schematic 226 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34970-66501 (sheet 4 of 4) A1 Memory Schematic 227 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34970-66502 (sheet 1 of 1) A2 Display and Keyboard Component Locator (top) 228 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34970-66502 (sheet 1 of 1) A2 Display and Keyboard Schematic 229 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34970-66503 (sheet 1 of 1) A3 Backplane Component Locator 230 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34970-66503 (sheet 1 of 1) A3 Backplane Schematic 231 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34970-66504 (sheet 1 of 2) A4 Internal DMM Component Locator (top) 232 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34970-66504 (sheet 2 of 2) A4 Internal DMM Component Locator (bottom) 233 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches Note: The DIAG:DMM:CYCLes? command returns three numbers indicating the cycle count on backplane relays “1”, “2”, and “3” (which correspond to relays K102, K103, and K104 respectively). See chapter 5 in the User’s Guide for more information.
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34970-66504 (sheet 2 of 4) A4 Input Amplifier and Ohms Current Schematic 235 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34970-66504 (sheet 3 of 4) A4 AC Schematic 236 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34970-66504 (sheet 4 of 4) A4 A/D Converter Schematic 237 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34901-66501 (sheet 1 of 1) 34901A 20-Channel Multiplexer Component Locator 238 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34901-66501 (sheet 1 of 5) 34901A 20-Channel Multiplexer Schematic 239 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34901-66501 (sheet 2 of 5) 34901A 20-Channel Multiplexer Schematic 240 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34901-66501 (sheet 3 of 5) 34901A 20-Channel Multiplexer Schematic 241 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34901-66501 (sheet 4 of 5) 34901A 20-Channel Multiplexer Schematic 242 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34901-66501 (sheet 5 of 5) 34901A 20-Channel Multiplexer Schematic 243 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34902-66501 (sheet 1 of 1) 34902A 16-Channel Multiplexer Component Locator 244 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34902-66501 (sheet 1 of 4) 34902A 16-Channel Multiplexer Schematic 245 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34902-66501 (sheet 2 of 4) 34902A 16-Channel Multiplexer Schematic 246 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34902-66501 (sheet 3 of 4) 34902A 16-Channel Multiplexer Schematic 247 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34902-66501 (sheet 4 of 4) 34902A 16-Channel Multiplexer Schematic 248 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34903-66501 (sheet 1 of 1) 34903A 20-Channel Actuator Component Locator 249 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34903-66501 (sheet 1 of 3) 34903A 20-Channel Actuator Schematic 250 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34903-66501 (sheet 2 of 3) 34903A 20-Channel Actuator Schematic 251 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34903-66501 (sheet 3 of 3) 34903A 20-Channel Actuator Schematic 252 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34904-66501 (sheet 1 of 1) 34904A 4x8 Matrix Component Locator 253 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34904-66501 (sheet 1 of 3) 34904A 4x8 Matrix Schematic 254 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34904-66501 (sheet 2 of 3) 34904A 4x8 Matrix Schematic 255 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34904-66501 (sheet 3 of 3) 34904A 4x8 Matrix Schematic 256 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34905-66501/34906-66501 (sheet 1 of 1) 34905A/34906A RF Multiplexer Component Locator 257 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34905-66501/34906-66501 (sheet 1 of 2) 34905A/34906A RF Multiplexer Schematic 258 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34905-66501/34906-66501 (sheet 2 of 2) 34905A/34906A RF Multiplexer Schematic 259 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34907-66501 (sheet 1 of 1) 34907A Multifunction Module Component Locator 260 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34907-66501 (sheet 1 of 5) 34907A Multifunction Module Schematic 261 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34907-66501 (sheet 2 of 5) 34907A Multifunction Module Schematic 262 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34907-66501 (sheet 3 of 5) 34907A Multifunction Module Schematic 263 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34907-66501 (sheet 4 of 5) 34907A Multifunction Module Schematic 264 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34907-66501 (sheet 5 of 5) 34907A Multifunction Module Schematic 265 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34908-66501 (sheet 1 of 1) 34908A 40-Channel Multiplexer Component Locator 266 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34908-66501 (sheet 1 of 3) 34908A 40-Channel Multiplexer Schematic 267 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches 34908-66501 (sheet 2 of 3) 34908A 40-Channel Multiplexer Schematic 268 Fold Here Fold Here Õ Binder Edge (LH Page) Foldout Cut Size = 9 x 19 inches
Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here 34908-66501 (sheet 3 of 3) 34908A 40-Channel Multiplexer Schematic 269 Ô Binder Edge (RH Page) Foldout Cut Size = 9 x 19 inches Fold Here Fold Here
Factory Reset State 1 Specifications The table below shows the state of the instrument after a FACTORY RESET from the Sto/Rcl menu or *RST command from the remote interface.
This information is subject to change without notice. © Keysight Technologies 1997 - 2015 Edition 7, February 2015 *34970-90012* 34970-90012 www.keysight.
