Agilent 75000 Series B Agilent E1326B 5 1/2-Digit Multimeter Service Manual Enclosed is the Service Manual for the Agilent E1326B 5 1/2-Digit Multimeter. Insert this manual, along with any other VXIbus manuals that you have, into the binder that came with your Agilent Technologies mainframe.
Certification Agilent Technologies certifies that this product met its published specifications at the time of shipment from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology (formerly National Bureau of Standards), to the extent allowed by that organization’s calibration facility, and to the calibration facilities of other International Standards Organization members.
Printing History The Printing History shown below lists all Editions and Updates of this manual and the printing date(s). The first printing of the manual is Edition 1. The Edition number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacement pages to correct the current Edition of the manual. Updates are numbered sequentially starting with Update 1. When a new Edition is created, it contains all the Update information for the previous Edition.
Declaration of Conformity according to ISO/IEC Guide 22 and CEN/CE NELEC EN 45014 Manufacturer’s Name: Agilent Technologies, Inc. Loveland Manufacturing Center Manufacturer’s Address: 815 14th Street S.W. Loveland, Colorado 80537 declares, that the product: Product Name: B-Size VXI 5 1/2 Digit Multimeter Model Number: E1326B Product Options: All conforms to the following Product Standards: Safety: EMC: IEC 61010-1:1990+A1:1992+A2:1995/EN61010-1:1993+A2 1995 Canada: CSA C22.2 No. 1010.
Agilent 75000 Series B Service Documentation Suggested Sequence to Use Manuals Manual Descriptions Installation and Getting Started Guide. Contains step-by-step instructions for all aspects of plug-in module and mainframe installation. This guide also contains introductory programming information and examples. Agilent Mainframe User’s Manual.
What’s in this Manual Manual Overview This manual shows how to service the Agilent E1326B 5 1/2-Digit Multimeter. Additional manuals which may be required for servicing the multimeter include the Agilent E1326B/E1411B User’s Manual which contains multimeter operation, installation, and configuration information, and the appropriate mainframe user’s manual(s) for mainframe operation, installation and configuration information.
Contents Chapter 1 - General Information Introduction . . . . . . . . . . . Safety Considerations . . . . . . Multimeter Description . . . . . Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . 1-1 . 1-3 . 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 6 - Replaceable Parts Introduction . . . . . . . . . . . Exchange Assemblies . . . . Ordering Information . . . . Replaceable Parts List . . . . . Reference Designators . . . Code List of Manufacturers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 General Information Introduction This Agilent E1326B Service Manual contains information required to test, adjust, troubleshoot, and repair the Agilent E1326B B-Size VXI 5 1/2-Digit Multimeter (multimeter). See the Agilent E1326B/E1411B User’s Manual for additional information on the Agilent E1326B multimeter. Figure 1-1 shows the Agilent E1326B multimeter and accessories supplied. Figure 1-1.
Warnings and Cautions WARNING This section contains WARNINGS which must be followed for your protection and CAUTIONS which must be followed to avoid damage to the equipment when performing instrument maintenance or repair. SERVICE-TRAINED PERSONNEL ONLY. The information in this manual is for service-trained personnel who are familiar with electronic circuitry and are aware of the hazards involved.
WARNING CAPACITOR VOLTAGES. Capacitors inside the mainframe may remain charged even when the mainframe has been disconnected from its source of supply. USE PROPER FUSES. For continued protection against fire hazard, replace the line fuse(s) only with fuses of the same current rating and type (such as normal blow, time delay, etc.). Do not use repaired fuses or short-circuited fuseholders. CAUTION Multimeter Description NOTE Static electricity is a major cause of component failure.
Multimeter Specifications Multimeter Serial Numbers Multimeter specifications are listed in Appendix A of the Agilent E1326B/E1411B User’s Manual. These specifications are the performance standards or limits against which the instrument may be tested. Multimeters covered by this manual are identified by a serial number prefix listed on the title page.
E1300B/E1301B Figure 1-2. Agilent E1326B Field Installation Kits Recommended Test Equipment Table 1-1 lists the test equipment recommended for testing, adjusting and servicing the multimeter. Essential requirements for each piece of test equipment are described in the Requirements column. Table 1-1. Recommended Test Equipment Instrument Requirements Recommended Model Use* Controller, GPIB GPIB compatibility as defined by IEEE Standard 488-1978 and the identical ANSI Standard MC1.
NOTES: 1-6 General Information
2 Installation Introduction This chapter provides information to install the Agilent E1326B multimeter, including initial inspection, preparation for use, environment, storage and shipment. Initial Inspection Inspect the shipping container for damage. If the shipping container or cushioning material is damaged, keep the container until the shipment contents have been checked and the instrument has been checked mechanically and electrically. See Chapter 1 (Figure 1-1) for shipment contents.
Shipping the Multimeter If you need to return the Agilent E1326B multimeter to Agilent Technologies, first remove any adapters or connectors before packaging the instrument for shipment. When you return the instrument to Agilent, attach a tag to the instrument identifying the owner and indicating service or repair required. In any correspondence, refer to the instrument by model number and full serial number.
3 Operating Instructions Introduction This chapter lists operating information for the Agilent E1326B multimeter, including: • Multimeter operation • Operator’s check (self-test) Multimeter Operation Operator’s Check See the Agilent E1326B/E1411B 5 1/2-Digit Multimeter User’s Manual for multimeter operation, including: • • • • Getting started Configuring the multimeter Using the multimeter Understanding the multimeter • • • • Multimeter command reference Multimeter specifications Multimeter error mes
3. A "0" returned means no self-test failure, while "1", "2", "3", or "4" returned means a failure was detected. See Chapter 8 - Service for troubleshooting information (see NOTE following). NOTE Example: Multimeter Self-Test Test failures can be caused by improper cabling, improper selection of the interface select code, primary, and/or secondary address setting. Verify proper connection and address selection before troubleshooting.
4 Verification Tests Introduction The three levels of test procedures described in this chapter are used to verify that the Agilent E1326B multimeter: • is fully functional (Functional Verification) • meets selected testable specifications (Operation Verification) • meets all testable specifications (Performance Verification) WARNING Do not perform any of the following verification tests unless you are a qualified, service-trained person and have read the WARNINGS and CAUTIONS in Chapter 1.
NOTE The upper and lower limits in the Performance Test Record assume the test equipment used is calibrated and operating at peak performance. If this is not the case, problems can occur. For example, an uncalibrated source may cause what seems to be an inaccurate measurement. This condition must be considered when observed measurements do not agree with the performance test limits.
3. Execute the multimeter functional verification test using the *TST? command. See the following example which uses an HP 9000 Series 300 computer with BASIC and a multimeter address of 70903. 4. A "0" returned means no failure, while "1", "2", "3" or "4" returned means a failure was detected. See Chapter 8 - Service for troubleshooting information. NOTE Test failures can be caused by improper selection of the interface select code, primary address setting, and/or secondary address setting.
Test 4-1: DC Voltage Test (Zero Volt Input) This test verifies DC Voltage accuracy on all five ranges with a zero volt input. Equipment Setup 1. Connect the equipment as shown in Figure 4-1. E1300B/1301B Figure 4-1. DC Voltage (Zero Volt Input) Setup 2. Set the Agilent E1326B multimeter as follows: • • • • Reset Multimeter ..................................................* RST Auto Zero .................................................................ON Power Line Cycles (PLC) .......................
3. Repeat steps 1 and 2 for the following ranges: E1326B Range 10% Overrange Input 0.91 V 7.27 V 58.1 V 300 V 1V 8V 64 V N/A 0V 0V 0V 0V 4. Remove power and disconnect test equipment. Example: Zero Volt DCV Test This example performs a DCV test for zero volts input and a power line reference frequency of 60 Hz. Change line 20 to OUTPUT 70903;"CAL:LFR 50" for 50 Hz operation.
Test 4-2: DC Voltage Test (DCV Input) This test verifies DC Voltage accuracy on all five ranges with DC voltage inputs. Equipment Setup 1. Connect the equipment as shown in Figure 4-2. You can connect to the E1326B OR the E1326-80005 terminals, but not to both. WARNING The DC Standard (Datron 4708, Option 10) can produce dangerous voltages which are present on the terminals. Do not touch the front (or rear) panel terminals unless you are sure no dangerous voltage is present. 2.
Test Procedure 1. Set the DC Standard (Datron 4708, Option 10) Output to 0.1 DCV. 2. Set the Agilent E1326B range to 0.113 V (0.125 V with 10% overrange) with CONF:VOLT:DC 0.1. 3. Measure the input with READ? and verify the results are within specified limits (at the range selected for 1 PLC). 4. Repeat steps 1 through 3 for the following DC Standard voltage settings and Agilent E1326B ranges: E1326B Range 0.91 V 7.27 V 58.1 V 300 V 10% overrange DC Std Output 1V 8V 64 V N/A 0.9 V 7.0 V 58.
100 PRINT "Set DC Standard to ";Volts(I);" VDC" 110 PRINT "Press Continue when ready" 120 PAUSE 130 CLEAR SCREEN 140 OUTPUT 70903;"CONF:VOLT:DC ";Range(I) Set DCV, range 150 WAIT 1 Wait for settling 160 OUTPUT 70903;"READ?" 170 ENTER 70903;Read_meas(I) Enter DC voltage 180 NEXT I 190 FOR I= 1 TO 5 200 PRINT "Voltage on";Range(I);"V range = ";Read_meas(I); "VDC" 210 NEXT I 220 END Test 4-3: AC Voltage Test This test verifies AC voltage accuracy on the 87.
WARNING The AC Standard (Datron 4708, Option 20) can produce dangerous voltages which are present on the terminals. Do not touch the front (or rear) panel terminals unless you are sure no dangerous voltage is present. 2. Set the Agilent E1326B multimeter as follows: • • • • Reset Multimeter ..................................................* RST Auto Zero ................................................................ON Power Line Cycles (PLC) ...........................................
Example: AC Voltage Test NOTE This example performs an ACV test for a power line reference frequency of 60 Hz. Change line 80 to OUTPUT 70903;"CAL:LFR 50" for 50 Hz operation. When connected to the Agilent E1326B multimeter, some AC Standards may exhibit voltage variations at the start of a measurement. The WAIT 1 statement (line 160) allows settling time for the AC Standard output. 1 ! AC Voltage Performance Verification 2 ! 10 OPTION BASE 1 20 DIM Read_meas(4),Source_volts(4),Source_freq(4) 30 DATA 0.
Test 4-4: Resistance Test (4-Wire Ohms) This test verifies the 4-wire resistance accuracy of the 2kΩ, 131kΩ, and 1MΩ ranges. NOTE Equipment Setup The DC Voltage performance test must be performed prior to the Resistance Test to check the A/D accuracy on all ranges. If the DC Voltage test has not been performed, resistance must be checked on all ranges at 0 and at 50% of full scale. 1. Connect the equipment as shown in Figure 4-4. You can connect to the E1326B OR to the E1326-80005, but not to both.
Test Procedure 1. Set the Resistance Standard (Datron 4708, Option 30) to 1 kΩ setting. 2. Set the Agilent E1326B range to 1861Ω (2048Ω with 10% overrange) with CONF:FRES 1861. 3. Measure the input resistance and verify the results are within specified limits (at the range selected for 1 PLC). NOTE For best measurement accuracy, you may want to measure the ACTUAL Resistance Standard value.
1 ! 4-Wire Ohms Performance Verification 2 ! 10 OPTION BASE 1 20 DIM Range(3),Source(3),Read_meas(3),Limit(3),Ohms(3) 30 DATA 1861, 119156, 1048576 40 READ Range(* ) 50 DATA 1000, 100000, 1000000 60 READ Source(* ) 70 OUTPUT 70903;"* RST" Sets autozero on and PLC 1 80 OUTPUT 70903;"CAL:LFR 60" Set 60 Hz line ref freq 90 FOR I= 1 TO 3 100 PRINT "1. Set Resistance Standard to";Source(I);"Ohms" 110 PRINT "2.
Performance Test Record NOTE Table 4-1, Performance Test Record for the Agilent E1326B Multimeter, is a form you can copy and use to record performance verification test results for the multimeter. Page 3 of Table 4-1 shows multimeter accuracy, measurement uncertainty and test accuracy ratio (TAR) values. See Appendix A - Calculating Multimeter Accuracy for example calculations of Table 4-1 entries.
Table 4-1. Performance Test Record for the Agilent E1326B Multimeter (Page 1 of 3) Test Facility: Name _____________________________________ Report No.
Table 4-1. Performance Test Record for the Agilent E1326B Multimeter (Page 2 of 3) Model _________________________________ Report No. ____________________ Date ________________ Test Equipment Used: Description Model No. Trace No. 1. DATRON 4708 ______________ ______________ ______________ 2. _______________________________ ______________ ______________ ______________ 3. _______________________________ ______________ ______________ ______________ 4.
Table 4-1. Performance Test Record for the Agilent E1326B Multimeter (Page 3 of 3) Model ________________________________ Report No. ____________________________ Date_____________ 1-Year Specifications Test Test Input DMM Range Low Limit Measured Reading High Limit Meas Uncert* No. Test Acc Ratio (TAR)* * DC Voltage (Zero Volts Input) (Values in Vdc) 4-1 0 0 0 0 0 0.113 0.91 7.27 58.1 300 -.000005 -.000015 -.00005 -.001 -.005 __________ __________ __________ __________ __________ + .
NOTES: 4-18 Verification Tests
5 Adjustments Introduction This chapter contains procedures to adjust the Agilent E1326B multimeter for peak performance. For best performance, the instrument should be adjusted after repair. All adjustments are performed electrically, so manual adjustment of the multimeter is not necessary. WARNING Do not perform any of the following adjustments unless you are a qualified, service-trained person, and have read the WARNINGS and CAUTIONS in Chapter 1.
DC Voltage Adjustments Equipment Setup This procedure adjusts Agilent E1326B DC voltage measurement accuracy. 1. Connect the equipment as shown in Figure 5-1. You can connect to the E1326B OR the E1326-80005 terminals, but not to both. WARNING The DC Standard (Datron 4708, Option 10) can produce dangerous voltages whch are present on the terminals. Do not touch the front (or rear) panel terminals unless you are sure no dangerous voltage is present. E1300B/E1301B Figure 5-1.
NOTE Adjustment Procedure *RST sets Auto Z ero to ON and Power L ine Cycles to 1. 1. Set the DC Standard output to 7.7 V. 2. Set the Agilent E1326B range to 8 V, and adjust the multimeter at + 7.7 V using: FUNC:VOLT:DC VOLT:DC:RANGE 8 CAL:VAL 7.7 CAL? 3. Verify that the returned calibration error code is 0 (no error). If not 0, see Table 5-1 for a list of calibration errors and codes.
displays an "adjustment complete" message. If a calibration error occurs, the program displays the calibration error and prompts you to repeat the adjustment (see Table 5-1 for a list of calibration errors). When connected to the Agilent E1326B multimeter, some DC Standards may exhibit voltage variations at the start of a measurement. TRIG:DEL .05 (line 190) adds a 0.8 second wait before calibration begins to allow settling time for the DC Standard output. TRIG:DEL .
310 PRINT "Press Continue for the next adjustment" 320 PAUSE 330 CLEAR SCREEN 340 NEXT I 350 END AC Voltage Adjustments NOTE This procedure adjusts the Agilent E1326B AC voltage measurement accuracy. The DC Voltage adjustment MUST be performed before the AC Voltage adjustment. E1300B/E1301B Figure 5-2. AC Voltage Adjustment Setup Equipment Setup 1. Connect the equipment as shown in Figure 5-2. You can connect to the E1326B OR the E1326-80005 terminals, but not to both. 2.
• • NOTE Adjustment Procedure Power Line Cycles (PLC) .............................................. 1 Line Freq Reference (CAL:LFR) ............. 50 Hz or 60 Hz *RST sets Auto Z ero to ON and Power L ine Cycles to 1. 1. Set the AC Standard output to 5.6 Vac at 1 kHz. 2. Set the Agilent E1326B range to 5.6 V, and adjust the multimeter at 5.6 V using: FUNC:VOLT:AC VOLT:AC:RANG 5.6 CAL:VAL 5.6 CAL? 3. Verify that the returned calibration error code is 0 (no error).
30 Re_try: ! 40 PRINT "Set AC Standard to 5.6 Vac at 1.0 kHz" 50 PRINT "Press Continue when ready" 60 PAUSE 70 CLEAR SCREEN 80 OUTPUT 70903;"FUNC:VOLT:AC" Set ACV function 90 OUTPUT 70903;"VOLT:RANG 5.6" Set 5.6 Vac range 100 OUTPUT 70903;"CAL:VAL 5.6" Set 5.6 Vac cal value 110 OUTPUT 70903;"TRIG:DEL .
NOTE Equipment Setup The DC Voltage adjustment and the AC Voltage adjustment MUST be performed before the Resistance adjustment. 1. Connect the equipment as shown in Figure 5-3. You can connect to the E1326B OR the E1326-80005 terminals, but not to both. 2. Set the Agilent E1326B as follows: • • • • NOTE Adjustment Procedure Reset Multimeter ...................................................... * RST Auto Zero ...................................................................
4. Repeat steps 1 through 3 using the following Agilent E1326B (and FRES:RANG) ranges, and Resistance Standard (and CAL:VAL) values. Agilent E1326B Range/ FRES:RANG < > Resistance Standard/ CAL:VAL < > 16000Ω 1048576Ω 10000Ω 1000000Ω 5. Remove power and disconnect test equipment. Example: 4-Wire Resistance Adjustments This example performs a 4-wire ohms resistance adjustment for a power line reference frequency of 60 Hz. Change line 80 to OUTPUT 70903;"CAL:LFR 50" for 50 Hz operation.
250 CLEAR SCREEN 260 GOTO Re_try 270 ELSE 280 PRINT "Adjustment complete with";Source(I);"Ohms source" 290 PRINT "Press Continue for the next adjustment" 300 PAUSE 310 CLEAR SCREEN 320 END IF 330 NEXT I 340 PRINT "Resistance adjustments completed" 350 END Calibration Errors Table 5-1 summarizes calibration error numbers, titles and descriptions for the Agilent E1326B multimeter.
14 Pacer Overrun Error The pacer is in use and the pacer rate is faster than the maximum A/D conversion rate based on integration time, autorange setting, autozero setting, and interrupts enabled. U 15 Input Overload A potentially damaging overload has been applied to the multimeter terminals and the multimeter has disconnected from the input. A new SET RANGE command is necessary to restore normal operation. A damaging overload is defined as: U 1.
5-12 Adjustments
6 Replaceable Parts Introduction This chapter contains information to order replaceable parts for the Agilent E1326B multimeter. Exchange Assemblies Table 6-1 lists assemblies that may be replaced on an exchange basis (EXCHANGE ASSEMBLIES). Exchange, factory-repaired, and tested assemblies are available only on a trade-in basis. Defective assemblies must be returned for credit. Assemblies required for spare parts stock must be ordered by the new assembly part number.
Reference* Agilent Part Designator Number Qty Description Mfr** Code Mfr Part Number A2 A2J101 A2J102 A2J103 A2K104-K105 A2K106 A2XU104 E1326-66502 44702-61603 1252-3712 1252-3416 0490-1556 0490-1555 1200-0817 1 1 1 1 2 1 1 INGUARD PRINTED CIRCUIT ASSY [a] Cable Assembly - Ribbon 10 Conductor Connector - Right Angle 2X6 12 Pin Connector - Right Angle 4 Pin Relay - Reed 2A 250MA 400VDC 5VDC-Coil Relay - Reed 2A 250MA 400VDC 5VDC-Coil Socket - 40 Pin Integrated Circuit 28480 28480 18873 27264 71707 71
Figure 6-1.
Table 6-3.
7 Manual Changes Introduction This chapter contains information to adapt this manual to instruments for which the content does not directly apply. Since this manual applies directly to instruments with serial numbers listed on the title page, change information is not required. See Multimeter Serial Numbers in Chapter 1 for Agilent E1326B multimeter serial number information.
7-2 Manual Changes
8 Service Introduction This chapter contains information to service the Agilent E1326B multimeter, including: • recommended repair strategy • troubleshooting techniques • repair/maintenance guidelines WARNING Do not perform any of the service procedures shown unless you are a qualified, service-trained person, and have read the WARNINGS and CAUTIONS in Chapter 1. Equipment Required See Table 1-1, Recommended Test Equipment for equipment required for multimeter troubleshooting and repair.
Service notes and other service literature for the Agilent E1326B multimeter may be available through Agilent. For information, contact your nearest Agilent Sales and Service Office. Recommended Repair Strategy The recommended repair strategy for the Agilent E1326B multimeter is assembly-level repair. User repairs to the Agilent E1326B multimeter are limited to replacement of the parts shown in Table 6-1 Agilent E1326B Replaceable Parts.
Table 8-2. Self-Test Errors Error Description Typical Causes 1 Multimeter does not respond to self-test . Bad connections/settings . Incorrect operation . Hardware failure (exchange) 2 Invalid communication between A1 and A2 processors . Bad A1/A2 connection . Hardware failure (exchange) 3 Data line test between multimeter and mainframe failed . Bad connections/settings . Incorrect operation . Hardware failure (exchange) 4 Invalid communication between multimeter and mainframe .
Table 8-3.
Testing A1/A2 PCAs To test the A1 Outguard PCA and the A2 Inguard PCAs, remove mainframe power and remove the multimeter from the mainframe. Then, remove the A2 Inguard PCA (see "Removing A2 Inguard PCA" for instructions). Then, see Table 8-3 for guidelines to isolate the problem to a user-replaceable part.
Repair/ Maintenance Guidelines ESD Precautions This section gives guidelines to repair and maintain the Agilent E1326B multimeter, including: • • • • • ESD precautions Removing A2 inguard PCA Removing binding posts Soldering printed circuit boards Post-repair safety checks Electrostatic discharge (ESD) may damage MOS, CMOS and other static sensitive devices in the Agilent E1326B multimeter. This damage can range from slight parameter degradation to catastrophic failure.
components. • After you remove an assembly from the multimeter, place the assembly on a conductive surface to guard against ESD damage. Do not stack assemblies. • Do not use pliers to remove a MOS or CMOS device from a high-grip socket. Instead, use a small screwdriver to pry the device up from one end. Slowly lift the device up, one pair of pins at a time. • After you remove a MOS or CMOS device from an assembly, place the device onto a pad of conductive foam or other suitable holding material.
Removing A2 Inguard PCA Use the following steps to remove the A2 A/D Inguard printed circuit assembly (PCA) from the A1 Outguard PCA. See Figure 8-1 for component locations. 1. Disconnect the four-conductor cable (CBL1) from A2J103. 2. Remove CBL1 from the two plastic retainers (MP9 and MP10) on the A2 Inguard PCA. 3. Disconnect the 10-pin ribbon cable (A2J101) from A1J3. 4. Remove the Torx T10 screw, using a T10 Torx driver. 5.
Soldering Printed Circuit Boards The etched circuit boards in the multimeter have plated-through holes that allow a solder path to both sides of the insulating material. Soldering can be done from either side of the board with equally good results. When soldering to any circuit board, keep in mind the following guidelines. CAUTION Do not use a sharp metal object such as an awl or twist drill, since sharp objects may damage the plated-through conductor.
NOTES: 8-10 Service
A Calculating Multimeter Accuracy Introduction This appendix shows how multimeter accuracy, measurement uncertainty, and test accuracy ratio (TAR) values are defined and calculated for the performance verification tests for the Agilent E1326B multimeter. See Table 4-1, "Performance Test Record for the Agilent E1326B Multimeter" for 1-year specification values of multimeter accuracy, measurement uncertainty, and test accuracy ratios (TARs).
Test Accuracy Ratio (TAR) Definition NOTE Multimeter Accuracy Calculations Test Accuracy Ratio (TAR) is the ratio of multimeter accuracy to measurement uncertainty. For the Agilent E1326B multimeter performance tests, test accuracy ratio = (High Limit value - Test Input value)/ Measurement Uncertainty value. This value is shown in the "Test Accuracy Ratio (TAR)" column of Table 4-1.
input the Low Limit in Table 4-1 = 6.9986 Volts and the High Limit = 7.0014 Volts. AC Voltage Accuracy Equations From Appendix A of the Agilent E1326B/E1411B User’s Manual, AC voltage 1-year accuracy = ± (% of reading + volts). The accuracy equations for the ranges, frequencies and apertures used in the performance verification tests are: Range Frequency Accuracy [± (% of reading + Volts)] 87.5 mV 87.5 mV 87.5 mV 300 V 60 Hz 5 kHz 10 kHz 5 kHz 0.695 + 3.195 + 3.195 + 10.
Measurement Uncertainty Calculations Measurement uncertainties for the Datron 4708 source are calculated using the 90-day accuracy specifications in the Datron 4708 User’s Handbook: Measurement Uncertainty = Datron Accuracy + Calibration Uncertainty, where Datron Accuracy (ppm) = Accuracy Relative to Calibration Standards = ± (ppm OUTPUT + ppm FS) and FS = 2 x range for all ranges except 1000V FS = 1100 for the 1000V range The assumed test conditions are: • Temperature of 23oC± 1oC • 90 days since last cal
Calculate ACV Measurement Uncertainty From Section 6 - Specifications of the Datron 4708 User’s Handbook, AC Voltage (Option 20) Accuracy (90 days since last calibration and 23oC ± 1o C) where Datron Accuracy = ± (ppm OUTPUT + ppm FS). Datron Output (ACV) Datron Range Datron Freq Datron Accuracy (ppm) Calibration Uncertainty (ppm) 0.07 0.07 0.07 0.07 300.
Test Accuracy Ratio (TAR) Calculations For the Agilent E1326B multimeter Test Accuracy Ratio (TAR) = [High Limit - Input Value]/Measurement Uncertainty where the source input value is in DCV, ACV, or Ohms. Example: Calculate DCV Test Accuracy Ratio For a 7.0 DCV measurement if the High Limit value = 7.000750 DCV and the Measurement Uncertainty = .0000115 DCV, Test Accuracy Ratio (TAR) = (7.000750 V - 7.0000000 V)/.0000115 V = 65:1 (rounded to the nearest integer value).
B Verification Tests - C Programs Functional Verification Test Example:Self Test This program is designed to do the Functional Verification Test found in Chapter 4 - Verification Tests. This example performs a multimeter self-test to ensure that the multimeter is communicating with the mainframe, external controller, and/or external terminal. #include #include
Performance Verification Tests Example: Zero Volt DCV Test These programs are designed to do the Performance Verification Tests found in Chapter 4 - Verification Tests. This example performs a DCV test for zero volts input and a power line reference frequency of 60 Hz. /* Zero Volt DCV Test E1326B */ #include #include
Example: DC Voltage Test This test performs a DC Voltage test for positive input DC volts and a power line reference frequency of 60 Hz. /* DC Voltage Test (DCV Input) E1326B */ #include #include #define ADDR "hpib7,9,03" /* Address of Agilent E1326B */ void main () { INST id; /* Define id as an instrument */ float range[5] = {0.113, 0.910, 7.270, 58.10, 300.0}; float volts[5] = {0.1, 0.9, 7.0, 58.0, 300.
Example: AC Voltage Test This example performs an AC voltage test for a power line reference frequency of 60 Hz. /* AC Voltage Test E1326B */ #include #include #define ADDR "hpib7,9,03" /* Address of Agilent E1326B */ void main () { INST id; /* Define id as an instrument */ float source_volts[4] = {0.07, 0.07, 0.07, 300.
Example: Resistance Test This example performs a 4-wire ohms resistance test. The program also calculates the Upper and Lower Limit values for the ACTUAL resistance values. Use these values in Table 4-1 if they differ from the given values. /* Resistance Test (4-wire Ohms) E1326B */ #include #include
Adjustments DC Voltage Adjustments These programs are designed to do the adjustments found in Chapter 5 Adjustments. This example performs DC Voltage adjustments for a power line reference frequency of 60 Hz. If no calibration error occurs, the program displays an "adjustment complete" message. If a calibration error occurs, the program displays the calibration error and prompts you to repeat the adjustment (see Table 5-1 for a list of calibration errors).
AC Voltage Adjustments This example performs an AC Voltage adjustment for a power line reference frequency of 60 Hz and an input of 5.6 Vac at 1 kHz. If no calibration error occurs, the program displays an "adjustment complete" message. If a calibration error occurs, the program displays the calibration error and prompts you to repeat the adjustment (see Table 5-1 for a list of calibration errors). /* AC Voltage Adjustments E1326B */ #include #include
Resistance Adjustments This example performs a 4-wire ohms resistance adjustment for a power line reference frequency of 60 Hz. If a calibration error occurs, the program displays the calibration error and prompts you to repeat the adjustment (see Table 5-1 for a list of calibration errors). /* 4-wire Resistance Adjustments E1326B */ #include #include
