Agilent 34405A 5 ½ Digit Multimeter User’s and Service Guide Agilent Technologies
Notices © Agilent Technologies, Inc. 2006–2014 Warranty 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 Agilent Technologies, Inc. as governed by United States and international copyright laws. The material contained in this document is provided “as is,” and is subject to being changed, without notice, in future editions.
Safety Information Do not defeat power cord safety ground feature. Plug in to a grounded (earthed) outlet. Do not use product in any manner not specified by the manufacturer. Do not install substitute parts or perform any unauthorized modification to the product. Return the product to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained.
Protection Limits The Agilent 34405A Digital Multimeter provides protection circuitry to prevent damage to the instrument and to protect against the danger of electric shock, provided that the Protection Limits are not exceeded. To ensure safe operation of the instrument, do not exceed the Protection Limits shown on the front panel, as defined below: 12A Fused V HI D 12A rms 1000VDC 750VAC 500Vpk 1.2A rms A LO B C I 1.
Additional Notices Maintenance This product complies with the WEEE Directive (2002/96/EC) marking requirement. The affixed product label (see below) indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE directive Annex 1, this product is classified as a "Monitoring and Control instrumentation" product. Do not dispose in domestic household waste.
Declaration of Conformity (DoC) The Declaration of Conformity (DoC) for this instrument is available on the Web site. You can search the DoC by its product model or description. http://regulations.corporate.agilent.com/DoC/search.htm NOTE VI If you are unable to search for the respective DoC, please contact your local Agilent representative.
Contents 1 2 34405A User’s and Service Guide Getting Started Tutorial 11 Introducing the Agilent 34405A Multimeter 12 Checking the Shipping Contents 13 Connecting Power to the Multimeter 13 Adjusting the Handle 14 The Front Panel at a Glance 15 The Display at a Glance 16 The Rear Panel at a Glance 17 Remote Operation 18 Configuring and Connecting the USB Interface SCPI Commands 18 Making Measurements 20 Measuring AC or DC Voltage 20 Measuring Resistance 21 Measuring AC (RMS) or DC Current up to 1.
Contents Math Annunciators 32 Using the Secondary Display 33 Measurement Functions and the Secondary Display Math Operations and the Secondary Display 35 33 Using the Utility Menu 36 Changing Configurable Settings 37 Reading Error Messages 38 The Beeper 39 Editing Values in the Secondary Display 40 Selecting the Value to Edit 40 Editing Values 40 Storing and Recalling Instrument States 41 Storing a State 41 Recalling a Stored State 42 Reset/Power-On State 43 Triggering the Multimeter 45 VIII 3 Measure
Contents Test Considerations 67 Input Connections 67 Performance Verification Tests Overview 68 Self -Test 68 Quick Performance Check 69 Performance Verification Tests 70 Zero Offset Verification 71 Gain Verification 73 Optional AC Voltage Performance Verification Test 79 Optional AC Current Performance Verification Test 80 Optional Capacitance Performance Verification Test 81 Calibration Security 82 Unsecuring the Instrument for Calibration 83 Calibration Process 85 Using the Front Panel for Adjustments 8
Contents Mechanical Disassembly Replaceable Parts 120 Rack Mounting 121 6 Specifications 123 DC Specifications[1] 125 AC Specifications[1] 126 Temperature and Capacitance Specifications[1] 128 Operating Specifications 129 Supplemental Measurement Specifications 130 General Characteristics 134 To Calculate Total Measurement Error 136 Accuracy Specifications 137 Configuring for Highest Accuracy Measurements Index X 113 138 139 34405A User’s and Service Guide
Agilent 34405A 5 ½ Digit Multimeter User’s and Service Guide 1 Getting Started Tutorial Introducing the Agilent 34405A Multimeter 12 Checking the Shipping Contents 13 Connecting Power to the Multimeter 13 Adjusting the Handle 14 The Front Panel at a Glance 15 The Rear Panel at a Glance 17 Measuring AC or DC Voltage 20 Measuring Resistance 21 Measuring AC (RMS) or DC Current up to 1.
1 Getting Started Tutorial Introducing the Agilent 34405A Multimeter The multimeter’s key features are: • 5 ½- digit dual display measurements • Ten measurement functions: • AC voltage • DC voltage • Two- wire resistance • AC current • DC current • Frequency • Continuity • Diode Test • Temperature • Capacitance • Six math functions: • Null • dBm • dB • Min/Max • Limit • Hold • 4 ½- or 5 ½- digit measurements • Dual display • USB 2.
Getting Started Tutorial 1 Checking the Shipping Contents Verify that you have received the following items with your multimeter: • One test lead kit • One power cord • One USB interface cable • A Quick Start Guide • A Certificate of Calibration (test report included) • A CD- ROM containing the remote programming online help, online manuals, application software, and instrument drivers • An Agilent IO Library CD- ROM If anything is missing, contact your nearest Agilent Sales Office.
1 Getting Started Tutorial Adjusting the Handle To adjust the handle, grasp the handle by the sides and pull outward. Then, rotate the handle to the desired position.
Getting Started Tutorial 1 The Front Panel at a Glance 1 s Agilent 34405A 5 ½ Digit Multimeter 12A Fused V HI mV DC Range 12A rms 1000VDC 750VAC 500Vpk 1.2A rms mV DC LO Power Cont ))) DCV 4 DCI Auto Freq ACV ACI Range Digits 5 Temp dB dBm Enter Null MnMx Disp Hold Utility Store Recall Limit Edit 2 1 2 3 4 5 3 4 Display On/Off Switch Measurement Function and Resolution Keys Autorange and Manual Range Math Operations and Edit 34405A User’s and Service Guide 5 I 1.
1 Getting Started Tutorial The Display at a Glance 5 6 7 Remote ManRng Hold Limit Null MnMx °C °F dBm Mk Hz μnF mVA DC AC CAL °C °F dBm Mk Hz μnF mVA DC AC MaxMinAvgN Ref R Value Range Store Recall HiLo Limit Shift 2 3 4 1 1 2 3 4 Primary Measurements and CAL Annunciator Primary Measurement Function and Units Math and State Storage Annunciators Range and Shift Annunciators 5 System Annunciators 6 Secondary Display 7 Secondary Measurement Function and Units The System Annunciators (above
Getting Started Tutorial 1 The Rear Panel at a Glance 2 6 4 1 1 USB Interface Connector 2 Model and Serial Number Label 3 Chassis Ground Lug 34405A User’s and Service Guide 5 3 4 AC Power Connector 5 AC Line Voltage Selector 6 AC Line Fuse 17
1 Getting Started Tutorial Remote Operation The instrument automatically enters the Remote state whenever SCPI commands are received over the USB bus interface. When in the Remote state, pressing Shift returns the multimeter to front panel operation. Local Configuring and Connecting the USB Interface There is nothing to configure on your instrument for a USB connection. Just connect the instrument to your PC using the USB 2.0 cable included with the instrument.
Getting Started Tutorial 1 SCPI Language Version You can determine the multimeter’s SCPI language version by sending the SYSTem:VERSion? command from the remote interface. • You can query the SCPI version from the remote interface only. • The SCPI version is returned in the form “YYYY.V”, where “YYYY” represents the year of the version, and “V” represents a version number for that year (for example, 1994.0).
1 Getting Started Tutorial Making Measurements The following pages show how to make measurement connections and how to select measurement functions from the front panel for each of the measurement functions. For remote operation, refer to the MEASure Subsystem in the Agilent 34405A Online Programmer’s Reference online help. Measuring AC or DC Voltage AC Voltage: • Five Ranges: 100.000 mV, 1.00000 V, 10.0000 V, 100.000 V, 750.
Getting Started Tutorial 1 Measuring Resistance • Seven Ranges: 100.000Ω, 1.00000 kΩ, 10.0000 kΩ, 100.000 kΩ, 1.00000 MΩ, 10.0000 MΩ, 100.000 MΩ • Measurement Method: two-wire ohms • Open-circuit voltage limited to < 5 V • Input protection 1000 V on all ranges (HI terminal) 12A Fused Test Current V Typical Display: HI 12A rms 1000VDC 750VAC Range Resistance LO 1.2A rms 500Vpk I 1.25A/500V FH CAT II (300V) Measuring AC (RMS) or DC Current up to 1.2A • Three AC Current or DC Current Ranges: 10.
1 Getting Started Tutorial Measuring AC (RMS) or DC Current up to 12A • 10 Amp AC Current or DC Current Range • Shunt Resistance: 0.01 Ω for 10A range • Internal 15A, 600V fuse for 12A terminal 12A Fused V Typical ACI Display: HI A ACI 12A rms AC + 1000VDC 750VAC Range A AC or DC Current Source LO AC Typical DCI Display: DCI - 1.2A rms 500Vpk I A DC Range 1.25A/500V FH A DC CAT II (300V) Measuring Frequency • Five Ranges: 100.000 mV, 1.00000 V, 10.0000 V, 100.000 V, 750.00 V.
Getting Started Tutorial 1 Testing Continuity • • • • Measurement Method: 0.83 mA ± 0.2% constant current source, < 5 V open circuit voltage. Response Time: 70 samples/ second with audible tone Continuity Threshold: 10 Ω fixed Input Protection: 1000 V (HI terminal) Test Current 12A Fused V Open Circuit Display: HI Cont ))) 12A rms Shift 1000VDC 750VAC LO Typical Closed Circuit Display: Open or Closed Circuit 1.2A rms 500Vpk I 1.
1 Getting Started Tutorial Measuring Capacitance • Eight ranges: 1nF, 10nF, 100nF, 1µF, 10µF, 100µF, 1000µF, 10,000µF and autorange • Measurement Method: Computed from constant current source charge time. Typical 0.2V - 1.4V AC signal level • Input Protection: 1000 V (HI terminal) 12A Fused Typical Display: V + HI μF μF 12A rms 1000VDC 750VAC 500Vpk 1.2A rms Range LO Capacitance - I 1.25A/500V FH CAT II (300V) Measuring Temperature • -80.0°C to 150.0 °C, -110.0°F to 300.
Getting Started Tutorial 1 Selecting a Range You can let the multimeter automatically select the range using autoranging, or you can select a fixed range using manual ranging. Autoranging is convenient because the multimeter automatically selects the appropriate range for sensing and displaying each measurement. However, manual ranging results in better performance, since the multimeter does not have to determine which range to use for each measurement. Selects a lower range and disables autoranging.
1 Getting Started Tutorial Setting the Resolution You can select either 4½ or 5½- digit resolution for the DCV, DCI, resistance, ACV, ACI and frequency measurement functions. • 5½- digit readings have the best accuracy and noise rejection. • 4½- digit readings provide for faster readings. • The continuity and diode test functions have a fixed, 4½- digit display. • Capacitance and temperature have a fixed 3½- digit display. 4 Shift Selects 4½- digit mode. 5 Shift Temp Temp Selects 5½- digit mode.
Agilent 34405A 5 ½ Digit Multimeter User’s and Service Guide 2 Features and Functions Math Operations 28 Using the Secondary Display 33 Using the Utility Menu 36 Editing Values in the Secondary Display 40 Storing and Recalling Instrument States 41 Reset/Power-On State 43 Triggering the Multimeter 45 This chapter contains detailed information on the multimeter and how to use the front panel. It builds on information you learned in the Quick Start Guide and the previous Getting Started Tutorial Chapter.
2 Features and Functions Math Operations The table below describes the math operations that can be used with each measurement function. Measurement Function Allowed Math Operations Null dBm dB Min/Max Limit Hold DCV 9 9 9 9 9 9 DCI 9 9 9 9 Ohms 9 9 9 9 ACV 9 9 9 9 ACI 9 9 9 9 Frequency 9 9 9 9 Capacitance 9 9 9 9 Temperature 9 9 9 9 9 9 Continuity Diode • All math operations can be toggled on and off by re- selecting the same math operation.
Features and Functions 2 Null Null When making null measurements, also called relative, each reading is the difference between a stored null value and the input signal. For example, this feature can be used to make more accurate resistance measurements by nulling the test lead resistance.
2 Features and Functions dB dB Shift Null Null When enabled, the dB operation computes the dBm value for the next reading, stores the dBm result into the dB Ref register and immediately produces the following calculation. The first displayed reading is always precisely 000.00 dB. dB = 10 x Log10 [ (Reading2 / RREF) / 0.001W ] - dB Ref • You can set dB Ref to any value between 0 dBm and \120.0000 dBm. The default RREF is 0 dBm. • Numeric results are displayed in the range of ± 120.000 dB with 0.
Features and Functions 2 When Min/Max is enabled, pressing Disp steps through the various Max, Min, Avg, and N values in the secondary display. Count values display in integer format until the maximum display value (120000) is reached after which counts are displayed in scientific notation. Limit Limit The Limit operation allows you to perform pass/fail testing against specified upper and lower limits.
2 Features and Functions The decision to update a new reading value in the primary display is based upon the box- car moving statistics of the present reading and the three previous readings as described below: Max (ReadingN ReadingN-1 ReadingN-2 ReadingN-3) Min (ReadingN ReadingN-1 ReadingN-2 ReadingN-3) • Minimum delta value to trigger an update on held value : 0.
Features and Functions 2 Using the Secondary Display Most measurement functions have predefined range or measurement capabilities that can be displayed in the secondary display. All math operations have predefined operations that are displayed on the secondary display. Measurement Functions and the Secondary Display When making measurements, the secondary display allows you to show the measurement range (for most measurement functions) or to select a predefined secondary measurement function.
2 Features and Functions The table below shows the secondary display capabilities for all measurement functions. Disp Repeatedly pressing cycles through the secondary display choices for the present measurement function as shown in the table below. The temperature, continuity and diode functions do not have secondary displays. .
Features and Functions 2 Math Operations and the Secondary Display When a math operation is selected, the secondary display shows the result of the math operation or the value(s) being used by the math operation. For example, a typical primary display showing the Limit math operation for DCV measurements and a secondary display showing a HI limit exceeded is: Limit mV DC Disp Repeatedly pressing cycles through the secondary display choices for the present math operation as shown in the table below.
2 Features and Functions Using the Utility Menu The Utility Menu allows you to customize a number of non- volatile instrument configurations. It also displays error messages and hardware revision codes. The contents of the Utility Menu are shown in the table below. Primary Display Secondary Display Settings tESt no ºunit Description Remote Command YES IF YES, immediately execute self-test upon next Store/Recall button push. After self-test completes, returns to normal instrument operation.
Features and Functions 2 Changing Configurable Settings The first seven items in the Utility Menu are configurable (Error and CodE are not configurable). Utility 1 To access the Utility Menu, press Shift Store Store Recall Recall . 2 The first Utility Menu selection (tESt) is shown in the primary display. When stepping through the configurable items, the present setting for each item is displayed in the secondary display. 3 To change the setting, use the setting you want.
2 Features and Functions Reading Error Messages The following procedure shows you to read error messages from the front panel. For remote operation, refer to the SYSTem:ERRor? command in the Agilent 34405A Online Programmer’s Reference online help. Utility 1 To access the Utility Menu, press 2 Press Edit Store Recall Recall Shift Store Store Recall Recall seven times until Error is shown in the primary display. 3 If there are no errors in the error queue, the secondary display shows nonE.
Features and Functions 2 The Beeper Normally, the multimeter beeps whenever certain conditions are met (for example, the multimeter beeps when a stable reading is captured in reading hold mode). The beeper is factory set to ON, but may be disabled or enabled manually. • Turning off the beeper does not disable the key click generated when you press a front- panel key. • A beep tone is always emitted (even with the beep state turned OFF) in the following cases.
2 Features and Functions Editing Values in the Secondary Display Many Math function values are editable in the secondary display. The table below describes key operations during number editing. These rules also apply for editing within the Utility menu. You can edit the values used for the Null, Limit, dB or dBM math function. For remote operation, refer to the CALCulate Subsystem in the Agilent 34405A Online Programmer’s Reference online help.
Features and Functions 2 Storing and Recalling Instrument States You can save and recall complete instrument states including all front panel settings, all math registers, all Utility Menu settings, and all bus specific settings. There are four user storage registers numbered 1 through 4. An additional state, state 0, is managed by the instrument and stores the last power- down state. The instrument automatically saves the complete instrument configuration to State 0 whenever a power- down event occurs.
2 Features and Functions NOTE To escape the recall operation without recalling a state, select ESC in step 4 above and press Store Recall Recall to escape. After escaping, the secondary display briefly shows - - - Recalling a Stored State To recall an instrument state: Store Recall 1 Press Recall flashing. 2 Press 3 Press , the display Store and Recall annunciators will begin until only the Recall annunciator is flashing. or Store Recall Recall again.
Features and Functions 2 Reset/Power-On State The table below summarizes the 34405A's settings as received from the factory, following power cycling, and following the *RST command received over the USB remote interface. Non- volatile, user customizable behavioral differences are shown in BOLD type.
2 Features and Functions Table 2 Reset/Power-On State Parameter Factory Setting Power-on / Reset State Reading Output Buffer* Cleared Cleared Error Queue* Cleared Cleared Power-on Status Clear* Last User Setting Status Registers, Masks & Transition Filters* Cleared Cleared if power-on status clear enabled; no change otherwise Serial Number Unique value per-instrument No Change Calibration state Secured User Setting Calibration value 0 No Change Calibration String Cleared No Cha
Features and Functions 2 Triggering the Multimeter From the front panel (Local mode), the multimeter always auto–triggers. Auto triggering takes continuous readings at the fastest rate possible for the selected measurement configuration. From the remote interface, triggering the multimeter is a three–step process: 1 Configure the multimeter for the measurement by selecting the function, range, resolution, and so on. 2 Specify the multimeter’s trigger source.
2 Features and Functions • The MEASure? command overwrites the BUS trigger and triggers the DMM and returns a measurement. • The READ? command does not overwrite the BUS trigger, and if selected, generates an error. It will only trigger the instrument and return a measurement when the IMMEdiate trigger is selected. • The INITiate command only initiates the measurement and needs a trigger (BUS or IMMEdiate) to make the actual measurement.
Agilent 34405A 5 ½ Digit Multimeter User’s and Service Guide 3 Measurement Tutorial DC Measurement Considerations 48 Noise Rejection 49 Resistance Measurement Considerations 51 True RMS AC Measurements 53 Other Primary Measurement Functions 56 Other Sources of Measurement Error 59 The Agilent 34405A multimeter is capable of making very accurate measurements. In order to achieve the greatest accuracy, you must take the necessary steps to eliminate potential measurement errors.
3 Measurement Tutorial DC Measurement Considerations Thermal EMF Errors Thermoelectric voltages are the most common source of error in low–level DC voltage measurements. Thermoelectric voltages are generated when you make circuit connections using dissimilar metals at different temperatures. Each metal–to–metal junction forms a thermocouple, which generates a voltage proportional to the junction temperature.
Measurement Tutorial 3 Noise Rejection Rejecting Power–Line Noise Voltages A desirable characteristic of integrating analog–to–digital (A/D) converters is their ability to reject power–line related noise present with DC input signals. This is called normal mode noise rejection, or NMR. The multimeter achieves NMR by measuring the average DC input by "integrating" it over a fixed period. Common Mode Rejection (CMR) Ideally, a multimeter is completely isolated from earth–referenced circuits.
3 Measurement Tutorial vibrating test leads will also induce error voltages. Tie down test leads securely when operating near magnetic fields. Whenever possible, utilize magnetic shielding materials or increased distance from magnetic sources. Noise Caused by Ground Loops When measuring voltages in circuits where the multimeter and the device under test are both referenced to a common earth ground, a ground loop is formed.
Measurement Tutorial 3 Resistance Measurement Considerations When measuring resistance, the test current flows from the input HI terminal through the resistor being measured. The voltage drop across the resistor being measured is sensed internal to the multimeter. Therefore, test lead resistance is also measured. The errors mentioned earlier in this chapter for DC voltage measurements also apply to resistance measurements. Additional error sources unique to resistance measurements are discussed here.
3 Measurement Tutorial 10 MΩ 205 nA 420 nW 100 MΩ 205 nA ||10 MΩ 35 nW Errors in High Resistance Measurements When you are measuring large resistances, significant errors can occur due to insulation resistance and surface cleanliness. You should take the necessary precautions to maintain a "clean" high–resistance system. Test leads and fixtures are susceptible to leakage due to moisture absorption in insulating materials and "dirty" surface films.
Measurement Tutorial 3 True RMS AC Measurements True RMS responding multimeters, like the Agilent 34405A, measure the "heating" potential of an applied voltage. Power dissipated in a resistor is proportional to the square of an applied voltage, independent of the waveshape of the signal. This multimeter accurately measures true RMS voltage or current, as long as the wave shape contains negligible energy above the instrument’s effective bandwidth.
3 Measurement Tutorial An AC–coupled true RMS measurement is desirable when you are measuring small AC signals in the presence of large DC offsets. For example, this situation is common when measuring AC ripple present on DC power supplies. There are situations, however, where you might want to know the AC+DC true RMS value. You can determine this value by combining results from DC and AC measurements, as shown below: For the best AC noise rejection, you should perform the DC measurement at 5½- digits.
Measurement Tutorial 3 With this multimeter, as discussed in the previous section, the focal issue is high–frequency signal content which exceeds the multimeter’s bandwidth. For periodic signals, the combination of crest factor and repetition rate can suggest the amount of high–frequency content and associated measurement error.
3 Measurement Tutorial Other Primary Measurement Functions Frequency Measurement Errors The multimeter uses a reciprocal counting technique to measure frequency. This method generates constant measurement resolution for any input frequency. All frequency counters are susceptible to errors when measuring low–voltage, low–frequency signals. The effects of both internal noise and external noise pickup are critical when measuring "slow" signals. The error is inversely proportional to frequency.
Measurement Tutorial 3 Capacitance Measurements The multimeter implements capacitance measurements by applying a known current to the capacitor as shown below: Coffset C RP Coffset Vcharge C R' d Measurement Model (during charge phase) Measurement Model (during discharge phase) Capacitance is calculated by measuring the change in voltage (DV) that occurs over a “short aperture” time, (Dt). The measurement cycle consists of two parts: a charge phase and a discharge phase.
3 Measurement Tutorial Temperature Measurements The multimeter measures temperature by measuring the temperature sensitive resistance of 5 kW thermistors. Thermistors consist of semiconductor materials and provide roughly 10 times the sensitivity of an RTD. Because they are semiconductors, their temperature range is more limited, commonly to –80 oC to 150 oC. Thermistors have highly non–linear temperature–resistance relationships; therefore their conversion algorithms are more complex.
Measurement Tutorial 3 Other Sources of Measurement Error Loading Errors (AC volts) In the AC voltage function, the input of the multimeter appears as a 1 MW resistance in parallel with 100 pF of capacitance. The cabling that you use to connect signals to the multimeter also adds capacitance and loading.
3 Measurement Tutorial AC Current Measurement Errors (Burden Voltage) Burden voltage errors, which apply to DC current, also apply to AC current measurements. However, the burden voltage for AC current is larger due to the multimeter's series inductance and your measurement connections. The burden voltage increases as the input frequency increases. Some circuits may oscillate when performing current measurements due to the multimeter's series inductance and your measurement connections.
Measurement Tutorial 3 Pulse Measurement Error You can use the DC measurement function to measure a pulse signal and obtain its relevant average measurement quickly. The formula of the equivalent DC average of a pulse signal is provided below. --1- f ( x ) dx T ∫ T where f(x) is the function representing the signal waveform over a period of T. Error may occur when the pulse signal is measured at low voltage range due to saturation of the multimeter’s analog- to- digital (ADC) rail voltage.
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Agilent 34405A 5 ½ Digit Multimeter User’s and Service Guide 4 Performance Tests and Calibration Calibration Overview 64 Recommended Test Equipment 66 Test Considerations 67 Performance Verification Tests Overview 68 Performance Verification Tests 70 Calibration Security 82 Calibration Process 85 Adjustments 88 Calibration Errors 103 This chapter contains performance test procedures and calibration procedures.
4 Performance Tests and Calibration Calibration Overview NOTE Make sure you have read “Test Considerations” on page 67 before calibrating the instrument. Closed - Case Electronic Calibration The instruments features closed- case electronic calibration. No internal mechanical adjustments are required. The instrument calculates correction factors based upon the input reference value you set. The new correction factors are stored in non- volatile memory until the next calibration adjustment is performed.
Performance Tests and Calibration 4 Time Required for Calibration The 34405A 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 67). Refer to the 34405A Programmer’s Reference online help for more information.
4 Performance Tests and Calibration 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 Agilent 3458A 8½ - Digit Digital Multimeter to measure less accurate yet stable sources.
Performance Tests and Calibration 4 Test Considerations 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. For optimum performance, all 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%.
4 Performance Tests and Calibration Performance Verification Tests Overview 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 6, “Specifications”. 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.
Performance Tests and Calibration 4 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.
4 Performance Tests and Calibration Performance Verification Tests The performance verification tests are recommended as acceptance tests when you first receive the instrument. The acceptance test results should be compared against the 1- year test limits. After acceptance, you should repeat the performance verification tests at every calibration interval. If the instrument fails performance verification, adjustment or repair is required. Adjustment is recommended at every calibration interval.
Performance Tests and Calibration 4 Zero Offset Verification This test is used to check the zero offset performance of the instrument. Verification checks are only performed for those functions and ranges with unique offset calibration constants. Measurements are checked for each function and range as described in the procedure on the next page. Zero Offset Verification Test 1 Connect the Shorting Plug to the HI and LO input terminals. (see “Input Connections” on page 67). Leave the current inputs open.
4 Performance Tests and Calibration Table 4 Input Zero Offset Verification Test Function[1] Range Error from Nominal Quick Check 1 year Open 1000µF ±5µF Open 10000µF ±0.05mF 100mV ±8 µV Short DC Volts Short 1V Short 10 V ±0.
Performance Tests and Calibration 4 Gain Verification This test checks the full- scale reading accuracy of the instrument. Verification checks are performed only for those functions and ranges with unique gain calibration constants. DC Voltage Gain Verification Test 1 Connect the calibrator to the front panel HI and LO input terminals. 2 Select each function and range in the order shown below. Provide the input shown in the table below. 3 Make a measurement and observe the result.
4 Performance Tests and Calibration DC Current Gain Verification Test 1 Connect the calibrator to the front panel I and LO input connectors. 2 Select each function and range in the order shown below. Provide the input shown in the table below. 3 Make a measurement and observe the result. Compare measurement results to the appropriate test limits shown in the table. (Be certain to allow for appropriate source settling when using the Fluke 5520A.
Performance Tests and Calibration 4 Ohms Gain Verification Test Configuration: 2- Wire Ohms (CONFigure:RESistance) 1 Select the Ohms function. 2 Select each range in the order shown below. Provide the resistance value indicated. Compare measurement results to the appropriate test limits shown in the table. (Be certain to allow for appropriate source settling.
4 Performance Tests and Calibration Frequency Gain Verification Test Configuration: Frequency (CONFigure:FREQuency) 1 Select the Frequency function. 2 Select each range in the order shown below. Provide the input voltage and frequency indicated. Compare measurement results to the appropriate test limits shown in the table. (Be certain to allow for appropriate source settling.
Performance Tests and Calibration 4 AC Voltage Verification Test Configuration: AC Volts (CONFigure[:VOLTage]:AC) 1 Select the AC Voltage function. 2 Select each range in the order shown below. Provide the indicated input voltage and frequency. Compare measurement results to the appropriate test limits shown in the table. (Be certain to allow for appropriate source settling.
4 Performance Tests and Calibration AC Current Verification Test Configuration: AC Current (CONFigure:CURRent:AC) 1 Select the AC Current function. 2 Select each range in the order shown below. Provide the input current and frequency indicated. Compare measurement results to the appropriate test limits shown in the table. (Be certain to allow for appropriate source settling.
Performance Tests and Calibration 4 Optional AC Voltage Performance Verification Test Configuration: AC Volts (CONFigure[:VOLTage]:AC) 1 Select the AC Voltage function. 2 Select each range in the order shown below. Provide the indicated input voltage and frequency. Compare measurement results to the appropriate test limits shown in the table. (Be certain to allow for appropriate source settling.
4 Performance Tests and Calibration Optional AC Current Performance Verification Test Configuration: AC Current (CONFigure:CURRent:AC) 1 Select the AC Current function. 2 Select each range in the order shown below. Provide the indicated input voltage and frequency. Compare measurement results to the appropriate test limits shown in the table. (Be certain to allow for appropriate source settling.
Performance Tests and Calibration 4 Optional Capacitance Performance Verification Test Configuration: Capacitance (CONFigure:CAPacitance) 1 Select the Capacitance function. 2 Select each range in the order shown below. Provide the indicated input voltage and frequency. Compare measurement results to the appropriate test limits shown in the table. (Be certain to allow for appropriate source settling.
4 Performance Tests and Calibration Calibration Security The calibration security code prevents accidental or unauthorized adjustments to 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 “Unsecuring the Instrument for Calibration” on page 83). The security code is set to AT34405 when the instrument is shipped from the factory.
Performance Tests and Calibration 4 Unsecuring the Instrument for Calibration Before you can adjust the instrument, you must unsecure it by entering the correct security code. The security code is set to AT34405 when the instrument is shipped from the factory. The security code is stored in non- volatile memory, and does not change when power has been off or after a Factory Reset (*RST command).
4 Performance Tests and Calibration Example 3 Assume the calibration security code has been set to ATB1 through remote interface. The first two characters (AT) are ignored. The B is represented by a zero. The “1” is still used and trailing zeros fill in the remaining characters. Use this code to unsecure: 01000 To Unsecure the Instrument from the Front Panel DCV Shift 1 Press and simultaneously to enter the Calibration Security Code entry mode.
Performance Tests and Calibration 4 Calibration Process The following general procedure is the recommended method to complete a full instrument calibration. 1 Read “Test Considerations” on page 67. 2 Perform the verification tests to characterize the instrument (incoming data). 3 Unsecure the instrument for calibration (see “Calibration Security” on page 82). Once unsecured, the instrument will be in Adjustment Mode as indicated by the illuminated CAL annunciator.
4 Performance Tests and Calibration Using the Front Panel for Adjustments This section describes the process used to perform adjustments from the front panel. Refer to the 34405A Programmer's Reference online help for remote interface commands. Selecting the Adjustment Mode Unsecure the instrument see “Unsecuring the Instrument for Calibration” on page 83. Once unsecured, the display CAL annunciator illuminates to indicate you are in Adjustment Mode.
Performance Tests and Calibration CAUTION 4 If you abort a calibration in progress when the instrument is attempting to write new calibration constants to EEPROM, you may lose all calibration constants for the function. Typically, upon re–applying power, the instrument will report error 742 through 748 (whichever is applicable). If this occurs, you should not use the instrument until a complete re–adjustment has been performed. A list of the possible calibration errors is given on page 103.
4 Performance Tests and Calibration Adjustments You will need a test input cable and connectors set, and a Shorting Plug to adjust the instrument (see “Input Connections” on page 67). NOTE After each adjustment finishes successfully, the primary display briefly shows PASS. If the calibration fails, the multimeter beeps, the primary display shows FAil and an error number is shown in the secondary display. Calibration error messages are described on page 103.
Performance Tests and Calibration 4 dB Shift Null Null 3 Press , the display CAL annunciator starts flashing to indicate the calibration is in progress. 4 The display will show the measurement functions and ranges as the adjustments progress. • Successful completion of the adjustment is indicated by a short beep and the primary display briefly showing PASS.
4 Performance Tests and Calibration Gain Adjustment Considerations • The zero adjustment procedure must have been recently performed prior to beginning any gain adjustment procedures. • Be sure to allow the instrument to warm up and stabilize for 2 hours before performing the adjustments. • Consider the thermal effects as you are connecting test leads to the calibrator and multimeter. It is recommended to wait one minute before starting the calibration after connecting the test leads.
Performance Tests and Calibration 4 DC Voltage Gain Adjustment Procedure Review the “Test Considerations” on page 67 and “Gain Adjustment Considerations” on page 90 sections before beginning this procedure. 1 Press DCV to enter DC Voltage Gain Calibration. 2 The primary display will show the uncalibrated value and the secondary display will show the reference value of the Cal Item. 3 Configure each Cal Item shown in the adjustment table below.
4 Performance Tests and Calibration 9 Verify the DC Voltage Gain adjustments using the “DC Voltage Gain Verification Test” on page 73. Table 15 DC Voltage Gain Adjustment Input Function Cal Item Dual Banana Plug with copper wire short between 2 terminals DC Voltage Short 100 mV 100 mV +1V +1V -1V -1V 10 V 10 V 100 V 100 V 1000 V 1000 V Caution: Set the calibrator output to 0V before disconnecting from the multimeter input terminals.
Performance Tests and Calibration NOTE 4 Always complete tests in the same order as shown in the appropriate table. 6 Enter the actual applied input (see “Entering Adjustment Values” on page 86). Disp 7 Press to start the adjustment. The CAL annunciator flashes to indicate the calibration is in progress. • Successful completion of each adjustment value is indicated by a short beep and the primary display briefly showing PASS.
4 Performance Tests and Calibration AC Voltage Gain Adjustment Procedure Review the “Test Considerations” on page 67 and “Gain Adjustment Considerations” on page 90 sections before beginning this procedure. 1 Press ACV to enter AC Voltage Gain Calibration. 2 The primary display will show the uncalibrated value and the secondary display will show the reference value of Cal Item. 3 Configure each Cal Item shown in the adjustment table below. 4 Use (Auto) or (Range) to select the Cal Item.
Performance Tests and Calibration Table 17 4 AC Voltage Gain Adjustment Input Vrms Frequency Function Frequency as 1kHz Cal Item 10 mV 1kHz AC Voltage 10 mV 100 mV 1kHz 100 mV 1V 1kHZ 1V 10V 1kHz 10 V 100 V 1kHz 100 V 750 V 1kHz 750 V Caution: Set the calibrator output to 0V before disconnecting from the multimeter input terminals.
4 Performance Tests and Calibration 6 Enter the actual applied input (see “Entering Adjustment Values” on page 86). Disp 7 Press to start the adjustment. The CAL annunciator flashes to indicate the calibration is in progress. • Successful completion of each adjustment value is indicated by a short beep and the primary display briefly showing PASS. • An adjustment failure is indicated by a long beep, the primary display showing FAiL and a calibration error number appearing in the secondary display.
Performance Tests and Calibration 4 Ohms Gain Adjustment Procedure Review the “Test Considerations” on page 67 and “Gain Adjustment Considerations” on page 90 sections before beginning this procedure. This procedure adjusts the gain for the two- wire ohms function. The gain for the 100 MΩ range is derived from the 10 MΩ range and does not have a separate adjustment point. 1 Press to enter the Ohms Gain Adjustment Mode.
4 Performance Tests and Calibration 9 Verify the Ohm Gain adjustments using the “Ohms Gain Verification Test” on page 75.
Performance Tests and Calibration 4 6 Enter the actual applied input (see “Entering Adjustment Values” on page 86). Disp 7 Press to start the adjustment. The CAL annunciator flashes to indicate the calibration is in progress. • Successful completion of each adjustment value is indicated by a short beep and the primary display briefly showing PASS. • An adjustment failure is indicated by a long beep, the primary display showing FAiL and a calibration error number appearing in the secondary display.
4 Performance Tests and Calibration NOTE If the zero adjustment procedure has been recently performed prior to Capacitance gain calibration procedures, the Cal Item 'Short' can be neglected. 4 Use (Auto) or (Range) to select the Cal Item. 5 Apply the input signal shown in the "Input" column of the table. NOTE Always complete tests in the same order as shown in the appropriate table. 6 Enter the actual applied input (see “Entering Adjustment Values” on page 86).
Performance Tests and Calibration Table 21 4 Capacitance Gain Adjustment Input Function Cal Item Input terminals open (remove any test leads or shorting plugs from the input terminals) Capacitance Open 0.4 nF 0.4 nF 1 nF 1 nF 10 nF 10 nF 100 nF 100 nF 1 μF 1 μF 10 μF 10 μF 100 μF 100 μF 1000 μF 1000 μF 10000 μF 10000 μF Finishing the Adjustments 1 Remove all shorting plugs and connections from the instrument. 2 Reset the Calibration Message (see below).
4 Performance Tests and Calibration Calibration Message The instrument allows you to store a 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. The calibration message may contain up to 40 characters. You can record a calibration message only when the instrument is unsecured.
Performance Tests and Calibration 4 Calibration Errors The following errors indicate failures that may occur during a calibration.
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Agilent 34405A 5 ½ Digit Multimeter User’s and Service Guide 5 Disassembly and Repair Operating Checklist 106 Types of Service Available 107 Repackaging for Shipment 108 Cleaning 108 To Replace the Power Line Fuse 109 To Replace a Current Input Fuse 110 Self-Test Errors 111 Electrostatic Discharge (ESD) Precautions 112 Mechanical Disassembly 113 Replaceable Parts 120 This chapter will help you troubleshoot a failing multimeter.
5 Disassembly and Repair Operating Checklist Before returning your multimeter to Agilent for service or repair check the following items: Is the multimeter inoperative? q Verify the power line voltage setting. q Verify the power line fuse is installed. q Verify that the power cord is connected to the multimeter and to AC line power. q Verify the front panel power switch is depressed.
Disassembly and Repair 5 Types of Service Available If your instrument fails during the warranty period, Agilent Technologies will repair or replace it under the terms of your warranty. After your warranty expires, Agilent offers repair services at competitive prices. Extended Service Contracts Many Agilent products are available with optional service contracts that extend the covered period after the standard warranty expires.
5 Disassembly and Repair Repackaging for Shipment If the unit is to be shipped to Agilent 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 model number and full serial number. • Place the unit in its original container with appropriate packaging material for shipping. • Secure the container with strong tape or metal bands.
Disassembly and Repair 5 To Replace the Power Line Fuse The power line fuse is located within the multimeter’s fuse–holder assembly on the rear panel. The multimeter is shipped from the factory with a power–line fuse installed. The supplied fuse is a time- lag, low- breaking, 0.2A/ 250V, 5x20mm fuse, Agilent part number 2110- 1395. If you determine that the fuse is faulty, replace it with one of the same size and rating. 1 Disconnect power cord. Depress tabs 1 and 2 and pull fuse holder from rear panel.
5 Disassembly and Repair To Replace a Current Input Fuse Both the 1.2A and the 12A current input terminals are fuse protected. The fuse for the 1.2A input terminal is located on the front panel (see page 15). The fuse is a 1.25A, 500V fuse, Agilent part number 2110- 1394. If you determine that the fuse is faulty, replace it with one of the same size and rating. The fuse for the 12A current input terminal is located inside the multimeter (see page 117) and requires partial disassembly of the multimeter.
Disassembly and Repair 5 Self-Test Errors The following errors indicate failures that may occur during a self- test. NOTE On the remote interface, a self–test failure will generate SCPI error –330 and a supplemental message indicating one of the test numbers shown below. On the front panel, only the failing test is shown.
5 Disassembly and Repair 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 reduce static charges.
Disassembly and Repair 5 Mechanical Disassembly For procedures in this manual, the following tools are required for disassembly: • T20 Torx driver (most disassembly) • Flat Blade screw driver • #2 Pozi–drive screw driver WA R N I N G SHOCK HAZARD. Only service–trained personnel who are aware of the hazards involved should remove the instrument covers. To avoid electrical shock and personal injury, make sure to disconnect the power cord from the instrument before removing the covers.
5 Disassembly and Repair 3 Remove the instrument bumpers. Pull from a corner and stretch the bumpers off the instrument. 4 Remove the rear bezel. Loosen the two captive screws in the rear bezel and remove the rear bezel.
Disassembly and Repair 5 5 Remove the cover. Remove the screw in the bottom of the cover and slide the cover off the instrument. Front Panel Removal 6 Remove on/off switch push rod. Gently move the power switch push rod toward the front of the instrument to disengage it from the switch. Be careful not to twist or bend the push rod.
5 Disassembly and Repair 7 Remove the two screws holding the front panel. 8 Disconnect the two ribbon cable connectors from the front panel.
Disassembly and Repair 5 9 Disconnect the individual front panel wires shown below. ite Wh ort Sh ck Bla 12A Cu Fus rrent e ue Bl k lac B ng Lo Br ow n 10 There is now enough play to allow the side of the front panel to be pried from the chassis and removed as an assembly.
5 Disassembly and Repair Front Panel Disassembly 1 Remove the keyboard and display assembly. Using a flat blade screwdriver, gently pry up on the circuit board tab (shown below) and slide the board to disengage from the tabs. Lift the keyboard and display assembly from the plastic housing.
Disassembly and Repair 5 a The rubber keypad can now be pulled from the plastic housing.
5 Disassembly and Repair Replaceable Parts This section contains information for ordering replacement parts for your instrument. The parts lists are divided into the following sections. Parts are listed in alphanumeric order according to their reference designators. The parts lists include a brief description of each part with applicable Agilent part number. To Order Replaceable Parts You can order replaceable parts from Agilent using the Agilent part number.
Disassembly and Repair 5 Rack Mounting You can mount the multimeter in a standard 19- inch rack cabinet using one of three optional kits shown below. NOTE You must remove the carrying handle (see page 113) and the front and rear bumpers (see page 114) before rack mounting the multimeter. To rack mount a single instrument, order adapter kit 5063- 9240. SAgilent 34405A 51/2 Digit Multimeter To rack mount two instruments side- by- side, order lock- link kit 5061- 9694 and flange kit 5063- 9212.
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Agilent 34405A 5 ½ Digit Multimeter User’s and Service Guide 6 Specifications DC Specifications[1] 125 AC Specifications[1] 126 Temperature and Capacitance Specifications[1] 128 Operating Specifications 129 Supplemental Measurement Specifications 130 General Characteristics 134 This chapter describes the multimeter’s specifications and operating specifications.
6 Specifications These specifications apply when using the 34405A multimeter in an environment that is free of electromagnetic interference and electrostatic charge. When using the multimeter in an environment where electromagnetic interference or significant electrostatic charge is present, measurement accuracy may be reduced. Particularly note: • The voltage measurement probes are not shielded and can act as antennas, causing electromagnetic interference to be added to the signal being measured.
Specifications 6 DC Specifications[1] Table 24 DC Accuracy ± (% of reading + % of range) Input Impedance [13] 1 Year 23° C ± 5° C Temperature Coefficient 0° C - 18° C 28° C - 55° C - 10MΩ ±2% 0.025+0.008 0.0015+0.0005 1.00000V - 10MΩ ±2% 0.025+0.006 0.0010+0.0005 10.0000V - 10.1MΩ ±2% 0.025+0.005 0.0020+0.0005 100.000V - 10.1MΩ ±2% 0.025+0.005 0.0020+0.0005 1000.00V - 10MΩ ±2% 0.025+0.005 0.0015+0.0005 - 0.05+0.008 [3] 0.0060+0.0008 0.0060+0.
6 Specifications AC Specifications[1] WA R N I N G Table 25 Exceeding the crest factor limit may result in an incorrect or a lower reading. Do not exceed the crest factor limit to avoid instrument damage and the risk of electric shock. AC Accuracy ± (% of reading + % of range) Temperature Coefficient 0° C - 18° C 28° C - 55° C Function Range [5] Frequency 1 Year 23° C ± 5° C True RMS AC Voltage[6] 100.000 mV 20 Hz - 45 Hz 1+0.1 0.02+0.02 45 Hz - 10 kHz 0.2+0.1 0.02+0.02 10 kHz - 30 kHz 1.
Specifications Table 26 Frequency Accuracy ± (% of reading + 3 counts) Function Frequency 6 [10] Temperature Coefficient 0° C - 18° C 28° C - 55° C Range [5] Frequency 1 Year 23° C ± 5° C 100.000 mV to 750.00 V <2Hz[17] 0.18+0.003 0.005 <20Hz 0.04+0.003 0.005 20Hz - 100kHz[11] 0.02+0.003 0.005 100kHz - 300kHz[12] 0.02+0.003 0.005 <2Hz[17] 0.18+0.003 0.005 <20Hz 0.04+0.003 0.005 20Hz - 10kHz[16] 0.02+0.003 0.005 10.0000 mA to 10.
6 Specifications Temperature and Capacitance Specifications[1] Table 27 Temperature and Capacitance Accuracy ± (% of reading + % of range) Function Range Probe Type or Test Current 1 Year 23° C ± 5° C Temperature Coefficient 0° C - 18° C 28° C - 55° C Temperature -80.0° C to 150°C 5 kΩ thermistor probe Probe accuracy + 0.2 °C 0.002 °C -110.0° F to 300.0° F 5 kΩ thermistor probe Probe accuracy + 0.4 °F 0.0036 °F 1.000 nF 0.75 µA 2+0.8 0.02+0.001 10.00 nF 0.75 µA 1+0.5 0.02+0.
Specifications 6 Operating Specifications Table 28 Function DCV DCI ACV ACI FREQ[6] Operating Specifications Digits Reading Speed [1] Function Range Auto Reading Speed Change (sec)[2] Change (sec)[3] Range (sec)[4] over USB/(sec)[5] 5.5 15 /s 0.3 0.3 <1.2 8 4.5 70 /s 0.2 0.2 <1.1 19 5.5 15 /s 0.4 0.4 <1.0 8 4.5 70 /s 0.3 0.3 <0.5 19 5.5 2.5 /s 1.3 1.7 <5.7 2 4.5 2.5 /s 1.2 1.5 <5.1 2 5.5 2.5 /s 1.8 2.2 <4.7 2 4.5 2.5 /s 1.5 1.9 <4.0 2 5.5 9 /s 2.
6 Specifications Supplemental Measurement Specifications Table 29 Supplemental Measurement Specifications DC Voltage • Measuring Method: • Sigma Delta A-to-D converter • Input Resistance: • 10MΩ ± 2% range (typical) • Input Protection: • 1000V on all ranges (HI terminal) Resistance • Measurement Method: • 2-wire Ohms • Open-circuit voltage: • Limited to < 5V • Input Protection: • 1000V on all ranges (HI terminal) DC Current • Shunt Resistance: • 0.1Ω to 10Ω for 10mA to 1.2A ranges • 0.
Specifications Table 29 6 Supplemental Measurement Specifications Continuity / Diode Test • Measurement Method: • Uses 0.83mA ± 0.
6 Specifications Table 29 Supplemental Measurement Specifications • Crest Factor: • Maximum 5:1 at full scale • Input Impedance: • 1MΩ ± 2% in parallel with < 100pF of all ranges • Input Protection: • 750V rms on all ranges (HI terminal) AC Current • Measurement Method: • DC coupled to the fuse and current shunt, AC coupled true rms measurement (measures the AC component only) • Shunt Resistance: • 0.1Ω to 10Ω for 10mA to 1.2A range • 0.01Ω for 12A range • Input Protection: • Externally accessible 1.
Specifications Table 29 6 Supplemental Measurement Specifications Math Functions • Null, dBm, dB, Min/Max/Avg, Hold, Limit Test Triggering and Memory • Single trigger, 1 reading memory Remote Interface • USB 2.0 full speed, USBTMC-USB488 device class Programming Language • SCPI, IEEE-488.1, IEEE-488.
6 Specifications General Characteristics Table 30 General Characteristics Power Supply • 100V/120V(127V)/220V(230V)/240V ± 10% • AC line frequency 45Hz - 66Hz and (360Hz - 440Hz, 100/120V operation) Power Consumption • 16VA maximum, <11W average Operating Environment • Full accuracy at 0° C to 55° C • Full accuracy to 80% RH at 30° C (non-condensing) • Altitude up to 3000 meters Storage Compliance • - 40° C to 70° C Safety Compliance • Certified by CSA for IEC/EN/CSA/UL 61010-1 2nd Edition Measurement C
Specifications Table 30 6 General Characteristics • Bench: 103.8mm x 261.1mm x 303.2 mm Weight • 3.75 kg (8.27 lb.
6 Specifications To Calculate Total Measurement Error The multimeter's accuracy specifications are expressed in the form: ( % of reading + % of range ). In addition to the reading error and range error, you may need to add additional errors for certain operating conditions. Check the list below to make sure you include all measurement errors for a given function. Also, make sure you apply the conditions as described in the footnotes on the specification pages.
Specifications 6 Accuracy Specifications Transfer Accuracy Transfer accuracy refers to the error introduced by the multimeter due to noise and short–term drift. This error becomes apparent when comparing two nearly–equal signals for the purpose of "transferring" the known accuracy of one device to the other. 1–Year Accuracy These long–term accuracy specifications are valid at the calibration temperature (Tcal) ± 5 °C temperature range.
6 Specifications Configuring for Highest Accuracy Measurements The measurement configurations shown below assume that the multimeter is in its power–on or reset state. It is also assumed that auto–ranging is enabled to ensure proper full scale range selection. • Select 5½ digits. • Null the test lead resistance for 2–wire ohms measurements, and to remove any interconnection offset for DC voltage measurements.
Index A AC Characteristics, 126 AC Current Gain Adjustment Procedure, 95 Performance Verification Test, 80 Verification Test, 78 AC Current Measurements Errors In, 60 AC Voltage Gain Adjustment Procedure, 94 Performance Verification Test, 79 Verification Test, 77 AC Voltage Measurements Errors In, 53 Loading Errors, 59 Accuracy, 138 Accuracy Specification Explained, 136 Adjusting the Handle, 14 Adjustments, 88 Adjustments, finishing, 101 Agilent Technologies Calibration Services, 64 Autorange thresholds, 25
Index G Gain Adjustment Considerations, 90 Adjustment Procedure, 91 Adjustments, 89 Verification, 73 General Characteristics, 134 General Disassembly, 113 Ground Loops, 50 H High Voltage Self-Heating Error, 59 Hold, 31 I IEC Measurement Category II Overvoltage Protection, IV IMMediate Triggering, 45 Input Connections, 67 Input Terminal Protection Limits, IV Input Values, 90 Integration TIme, 49 Interval, calibration, 64 Introducing the Agilent 34405A Multimeter, 12 L Limit, 31 Line Fuse, 109 Loading Err
Index Replace Current Input Fuse, 110 Power Line Fuse, 109 Replaceable Parts, 120 Reset/Power-On State, 43 Resistance Measurements Errors In, 51 High Resistance Errors, 52 Restricted Rights Legend, II S Safety Compliance, 134 Information, III Notices, II Symbols, III SCPI Commands, 18 Language Version, 19 Secondary Display, 33 Selecting a Range, 25 Selecting the Adjustment Mode, 86 Self -Test, 68 Setting Beeper, 39 Resolution, 26 Shock and Vibration, 134 Software Revision, II Software Triggering, 45 Speci
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