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Chapter 5

Adjustments

Introduction

This chapter contains procedures to adjust the HP E1411 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 - General Information.

NOTE

ALL adjustment procedures MUST be performed in the order shown in this
manual (DC Voltage, then AC Voltage, and then Resistance).

Adjustment

Conditions /

Procedures

For valid adjustments, the HP E1411 multimeter and test equipment used
must have at least a 60 minute warm-up, and the line voltage must be
115/230 Vac

±

10%. For best accuracy, the temperature of the area where

adjustments are made should be between 18

o

C and 28

o

C and stable to

within

±

1

o

C. See Table 1-1, Recommended Test Equipment, for test

equipment requirements.

The adjustment procedures assume the person performing the adjustments
understands how to operate the mainframe, multimeter and specified test
equipment. The adjustment procedures do not specify test equipment
settings, except in general terms. It is assumed a qualified, service-trained
person will select and connect the cables and jumpers required for the
adjustments.

Chapter 5

Adjustments 37

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Содержание E1411A

Страница 1: ...ction 15 Initial Inspection 15 Preparation for Use 15 Shipping the Multimeter 16 Chapter 3 Operating Instructions 17 Introduction 17 Multimeter Operation 17 Operator s Check 17 Self Test Procedure 17 Example Multimeter Self Test 18 Chapter 4 Verification Tests 19 Introduction 19 Test Conditions Procedures 19 Performance Test Record 19 Verification Test Examples 20 Functional Verification Test 20 S...

Страница 2: ...ing Information 49 Replaceable Parts List 49 Chapter 7 Manual Changes 55 Introduction 55 Chapter 8 Service 57 Introduction 57 Equipment Required 57 Service Aids 57 TroubleshootingTechniques 58 Identifying the Problem 58 Testing Assemblies 59 Repair Guidelines 60 ESD Precautions 60 Removing Top Shield 61 Removing Front Panel 62 Removing Binding Posts 63 Soldering Printed Circuit Boards 63 Post Repa...

Страница 3: ...AR Calculations 70 Appendix B Verification Tests C Programs 71 Functional Verification Test 71 Example Self Test 71 Performance Verification Tests 72 Example Zero Volt DCV Test 72 Example DC Voltage Test 73 Example AC Voltage Test 74 Example Resistance Test 75 Adjustments 76 DC Voltage Adjustments 76 AC Voltage Adjustments 77 Resistance Adjustments 78 ...

Страница 4: ...Notes ...

Страница 5: ...tions of HP products that result from the Buyer s circuitry In addition HP does not warrant any damage that oc curs as a result of the Buyer s circuit or any defects that result from Buyer supplied products NO OTHER WARRANTY IS EXPRESSED OR IMPLIED HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Exclusive Remedies THE REMEDIES PROVIDED HEREI...

Страница 6: ...es involving the removal of covers or shields are for use by service trained personnel only Under certain conditions dangerous voltages may exist even with the equipment switched off To avoid dangerous electrical shock DO NOT perform procedures involving cover or shield removal unless you are qualified to do so DO NOT operate damaged equipment Whenever it is possible that the safety protection fea...

Страница 7: ... 801 3 1984 3 V m IEC 801 4 1988 1kV Power Line 0 5kV signal lines ENV50141 1993 prEN50082 1 1995 3 Vrms ENV50142 1994 prEN50082 1 1995 1 kV CM 0 5kV DM IEC1000 4 8 1993 prEN50082 1 1995 3 A m EN61000 4 11 1994 prEN50082 1 1995 30 10ms 60 100ms Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC inclu...

Страница 8: ...Notes 8 HP E1411A B Service Manual ...

Страница 9: ...well organized O O O O O Instructions are easy to understand O O O O O The documentation is clearly written O O O O O Examples are clear and useful O O O O O Illustrations are clear and helpful O O O O O The documentation meets my overall expectations O O O O O Please write any comments or suggestions below be specific cut along this line fold here Your Name Company Name Job Title Address City Sta...

Страница 10: ...10 HP E1411A E1411B Service Manual ...

Страница 11: ...11B multimeters Safety Considerations This product is a Safety Class I instrument that is provided with a protective earth terminal when installed in the mainframe The mainframe multimeter and all related documentation should be reviewed for familiarization with safety markings and instructions before operation or service Refer to the WARNINGS page page 4 in this manual for a summary of safety inf...

Страница 12: ...ide or outside the mainframe or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Grounding one conductor of a two conductor outlet is not sufficient protection IMPAIRED PROTECTION Whenever it is likely that instrument protection has been impaired the mainframe must be made inoperative and be secured against any unintended operatio...

Страница 13: ... C Installation and Getting Started Guide to set the addresses to create an instrument The instrument may consist of a multimeter only stand alone operation or can include relay or FET multiplexers scanning multimeter operation The instrument is operated from a computer using Standard Commands for Programmable Instruments SCPI language In stand alone operation input signals are connected to the mu...

Страница 14: ... 1BN that provides a MIL STD 45662A Calibration Certificate Contact your nearest Hewlett Packard Sales and Support Office for information on Option 1BN 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...

Страница 15: ...here is mechanical damage or defect or if the instrument does not pass the electrical performance tests notify your nearest Hewlett Packard Sales and Support Office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as Hewlett Packard and keep the shipping materials for the carrier s inspection Preparation for Use See Chapter 2 of the H...

Страница 16: ...hose used in factory packaging which are available through Hewlett Packard Sales and Support Offices Mark the shipping container FRAGILE to assure careful handling If you use other commercially available shipping materials wrap the instrument in heavy paper or plastic Use a strong shipping container A double wall carton of 2 4 MPa 350 psi test material is adequate Use enough shock absorbing materi...

Страница 17: ...elf test TST command and checking the return The operator s check can be used to verify the multimeter is connected properly and is responding to the self test command As required see the mainframe user s manual for information on address selection See the HP E1326A E1411A User s Manual or the E1326B E1411B User s Manual for information on multimeter SCPI commands Self Test Procedure 1 Verify the ...

Страница 18: ...rify proper connection and address selection before troubleshooting Example Multimeter Self Test An example follows which uses an HP 9000 Series 300 computer with HP BASIC and a multimeter address of 70903 10 OUTPUT 70903 TST Send the self test command 20 ENTER 70903 A Enter self test result 30 PRINT A 40 END 18 Operating Instructions Chapter 3 ...

Страница 19: ...st test accuracy the ambient temperature of the test area should be between 18o C and 28o C and stable to within 1o C You should perform the Performance Verification tests at least once a year For heavy use or severe operating environments perform the tests more often The verification tests assume the person performing the tests understands how to operate the mainframe multimeter and specified tes...

Страница 20: ... Test The functional verification test for the HP E1411 multimeter consists of the multimeter self test You can perform this test to verify the multimeter is functional and is communicating with the mainframe external computer and or external terminal Self Test Procedure This test verifies the multimeter is communicating with the mainframe external controller and or external terminal by performing...

Страница 21: ...Use the Performance Verification tests for post repair checkout Performance Verification Tests Performance verification tests are used to check the multimeter s electrical performance against the specifications in Appendix A Specifications of the HP E1326A E1411A User s Manual or the E1326B E1411B User s Manual as the performance standards These tests are suitable for incoming inspection and troub...

Страница 22: ...up 1 Connect the equipment as shown in Figure 4 1 2 Set the HP E1411 multimeter as follows Reset Multimeter RST Auto Zero ON Power Line Cycles PLC 1 Line Freq Reference CAL LFR 50Hz or 60Hz NOTE RST sets Auto Zero to ON and Power Line Cycles to 1 Test Procedure Figure 4 1 DC Voltage Zero Volt Input Setup 22 Verification Tests Chapter 4 ...

Страница 23: ... volts input and a power line reference frequency of 60 Hz Change line 20 to OUTPUT 70903 CAL LFR 50 for 50 Hz operation 1 Zero Volts Performance Verification 10 OUTPUT 70903 RST Resets and sets autozero ON and PLC to 1 20 OUTPUT 70903 CAL LFR 60 Sets line reference to 60 Hz 30 OUTPUT 70903 MEAS VOLT DC 1 Measure 0 113 V range 40 ENTER 70903 A 50 PRINT A 60 OUTPUT 70903 MEAS VOLT DC 9 Measure 0 91...

Страница 24: ...ard 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 Set the HP E1411 multimeter as follows Reset Multimeter RST Auto Zero ON Power Line Cycles PLC 1 Line Freq Reference CAL LFR 50Hz or 60Hz Figure 4 2 DC Voltage DCV Input Setup 24 Verification Tests Chapter 4...

Страница 25: ...disconnect test equipment Example DC Voltage Test DCV Input This example performs a DCV test for DC volts input and a power line reference frequency of 60 Hz Change line 80 to OUTPUT 70903 CAL LFR 50 for 50 Hz operation NOTE When connected to the HP E1411 multimeter some DC Standards may exhibit voltage variations at the start of a measurement The WAIT 1 statement line 150 provides a one second wa...

Страница 26: ...es using sine wave inputs at 50 of full scale The input frequency varies from 20 Hz to 10 kHz The DC component must be 10 of the AC component NOTE The DC Voltage Performance test must be performed prior to the AC Voltage test to check the A D accuracy on all ranges If the DC Voltage test has not been performed the AC voltage must be checked on all ranges Equipment Setup 1 Connect the equipment as ...

Страница 27: ...Vac at 20 Hz sine wave 2 Set the HP E1411 range to 79 5 mV 87 5 mV with 10 overrange using CONF VOLT AC 07 3 Measure the AC input voltage with READ and verify the results are within specified limits at the range selected for 1 PLC Record the results on the Performance Test Record 4 Repeat steps 1 through 3 using the following AC Standard voltage and frequency settings and HP E1411 ranges Figure 4 ...

Страница 28: ...output 1 AC Voltage Performance Verification 10 OPTION BASE 1 20 DIM Read_meas 5 Source_volts 5 Source_freq 5 30 DATA 0 07 0 07 0 07 0 07 300 0 40 READ Source_volts 50 DATA 20 60 5000 10000 5000 60 READ Source_freq 70 OUTPUT 70903 RST Set autozero ON PLC 1 80 OUTPUT 70903 CAL LFR 60 Set 60 Hz line ref frequency 90 FOR I 1 TO 5 100 PRINT 1 Set AC Standard output to Source_volts I Vac 110 PRINT 2 Se...

Страница 29: ...esistance 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 Equipment Setup 1 Connect the equipment as shown in Figure 4 4 2 Set the HP E1411 multimeter as follows Reset Multimeter RST Auto Zero ON Power Line Cycles PLC 1 Figure 4 4 Resistance Test Setup Chapter 4 Verification Tests 29 ...

Страница 30: ...You can do this by recording the front panel display of the resistance value or measuring the resistance with an HP 3458A multimeter or equivalent For example suppose the ACTUAL resistance value for the 1 kΩ setting is 1001 3Ω Then the Lower Limit for this value 1001 03 Ω and the Upper Limit 1001 57Ω These limits would replace the existing limits of 999 730Ω and 1000 270Ω shown in Table 4 1 If the...

Страница 31: ...000 1000000 60 READ Source 70 OUTPUT 70903 RST Set autozero on and PLC 1 80 OUTPUT 70903 CAL LFR 60 Set 60 Hz line ref frequency 90 FOR I 1 TO 3 100 PRINT 1 Set Resistance Standard to Source I Ohms 110 PRINT 2 Measure ACTUAL Resistance Standard value in Ohms 120 PRINT Enter ACTUAL Resistance Standard value in Ohms Ohms I 130 CLEAR SCREEN 140 OUTPUT 70903 CONF FRES Range I Set 4 wire ohms range 150...

Страница 32: ...C Voltage and 4 Wire Resistance measurements using the 90 day specifications in Appendix A Specifications in the HP E1326A E1411A User s Manual or the E1326B E1411B User s Manual In Table 4 1 the High Limit and Low Limit columns represent the multimeter accuracy for the specified test conditions Measurement Uncertainty For the performance verification tests in this manual measurement uncertainties...

Страница 33: ...___________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ _____________________________________________________________________________________...

Страница 34: ...______________________ 12 ________________________________ 13 ________________________________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _...

Страница 35: ...____ __________ __________ __________ __________ 100028 900132 7 000750 58 009799 300 050000 0000012 0000044 0000210 0002820 0017750 10 1 10 1 10 1 10 1 10 1 AC Voltage 20 Hz 60 Hz 10 kHz 5 kHz Values in VAC 4 3 0 07 0 07 0 07 0 07 300 00 0 0875 0 0875 0 0875 0 0875 300 00 067480 069327 069327 067578 296 125000 __________ __________ __________ __________ __________ 072523 070673 070673 072423 303 ...

Страница 36: ...Notes 36 Verification Tests Chapter 4 ...

Страница 37: ...sistance Adjustment Conditions Procedures For valid adjustments the HP E1411 multimeter and test equipment used must have at least a 60 minute warm up and the line voltage must be 115 230 Vac 10 For best accuracy the temperature of the area where adjustments are made should be between 18o C and 28o C and stable to within 1o C See Table 1 1 Recommended Test Equipment for test equipment requirements...

Страница 38: ...rd 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 Set the HP E1411 as follows Reset Multimeter RST Auto Zero ON Power Line Cycles PLC 1 Line Freq Reference CAL LFR 50 Hz or 60 Hz Figure 5 1 DC Voltage Adjustment Setup 38 Adjustments Chapter 5 ...

Страница 39: ...g HP E1411 voltage ranges and DC Standard settings HP E1411 range DC Standard Output 8 V 0 125 V 0 125 V 1 V 1 V 64 V 64 V 300 V 300 V 7 7 V 0 121 V 0 121 V 0 97 V 0 97 V 62 V 62 V 300 V 300 V 5 Remove power and disconnect test equipment Example DC Voltage Adjustments This example performs DC voltage adjustments for a power line reference frequency of 60 Hz Change line 80 to OUTPUT 70903 CAL LFR 5...

Страница 40: ...et 60 Hz line ref frequency 90 FOR I 1 TO 10 100 Re_try 110 CLEAR SCREEN 120 PRINT Set DC Standard to Volts I VDC 130 PRINT Press Continue when ready 140 PAUSE 150 CLEAR SCREEN 160 OUTPUT 70903 FUNC VOLT DC Set DCV function 170 OUTPUT 70903 VOLT RANG Range I Set E1411 range 180 OUTPUT 70903 CAL VAL Volts I Set CAL VAL value 190 OUTPUT 70903 TRIG DEL 05 Wait for settling 200 OUTPUT 70903 CAL Perfor...

Страница 41: ...ustment MUST be performed before the AC Voltage adjustment Equipment Setup 1 Connect the equipment as shown in Figure 5 2 2 Set the HP E1411 as follows Reset Multimeter RST Auto Zero ON Power Line Cycles PLC 1 Line Freq Reference CAL LFR 50 Hz or 60 Hz Figure 5 2 AC Voltage Adjustment Setup Chapter 5 Adjustments 41 ...

Страница 42: ...ine reference frequency of 60 Hz Change line 20 to OUTPUT 70903 CAL LFR 50 for 50 Hz operation If no calibration error occurs Cal_code 0 in line 130 the program displays an adjustment complete message If a calibration error occurs the program displays the calibration error see Table 5 1 for a list of calibration errors When connected to the HP E1411 multimeter some AC Standards may exhibit voltage...

Страница 43: ...T 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 05 Wait for settling 120 OUTPUT 70903 CAL Perform calibration 130 ENTER 70903 USING K Cal_code 140 IF Cal_code 0 THEN 150 PRINT Calibration Error Cal_code on 5 6 Vac range 160 PRINT Check source value connections then 170 PRINT press Continue to retry this adjustment 180 PAUSE 190 CLEAR SCREEN...

Страница 44: ... and the AC Voltage adjustment MUST be performed before the Resistance adjustment Equipment Setup 1 Connect the equipment as shown in Figure 5 3 2 Set the HP E1411 as follows Reset Multimeter RST Auto Zero ON Power Line Cycles PLC 1 Line Freq Reference CAL LFR 50 Hz or 60 Hz Figure 5 3 Resistance Adjustments Setup 44 Adjustments Chapter 5 ...

Страница 45: ...rom the Datron front panel or you can measure the value with an HP 3458A multimeter or equivalent 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 The calibration error can be returned to the external computer using an ENTER type statement 4 Repeat steps 1 through 3 using the following HP E1411 and FRES RANG ranges an...

Страница 46: ... Resistance Standard to Source I Ohms 120 PRINT 2 Measure ACTUAL Resistance Standard value in Ohms 130 PRINT Enter ACTUAL Resistance Standard value in Ohms Ohms_actual 140 CLEAR SCREEN 150 OUTPUT 70903 FUNC FRES Set 4 wire ohms 160 OUTPUT 70903 FRES RANG Range I Set resistance range 170 OUTPUT 70903 CAL VAL Ohms_actual I Set cal value 180 OUTPUT 70903 CAL Perform calibration 190 ENTER 70903 Cal_co...

Страница 47: ...e corrupted H 8 Invalid CAL Request Calibration requested for an invalid combination of multimeter range and function U 9 Bad CAL Target The target value for the calibration was outside the range of 0 5 full scale to full scale U 11 No Inguard Response No response from inguard expected data and got nothing Timed out instead H 13 Linearity CAL Error An error has occurred during a linearity calibrat...

Страница 48: ...Notes 48 Adjustments Chapter 5 ...

Страница 49: ...ssembly part number Contact your nearest Hewlett Packard Sales and Support Office for details Ordering Information To order a part listed in Table 6 1 or 6 2 specify the Hewlett Packard part number and the quantity required Send the order to your nearest Hewlett Packard Sales and Support Office Replaceable Parts List Table 6 1 HP E1411A Replaceable Parts lists replaceable parts for the HP E11411A ...

Страница 50: ...968S 2 640379 1 2 640379 1 2 640358 1 CBL1 CBL2 E1326 61601 E1326 61605 1 1 CABLE ASSEMBLIES Cable Assembly 6 Conductor Cable Assembly 4 Conductor 28480 28480 E1326 61601 E1326 61605 MP1 MP2 MP3 MP4 MP5 MP6 MP7 MP8 PNL1 SHD1 SHD2 E1400 84105 E1400 84106 1510 0091 1510 0091 1510 0091 1510 0091 8160 0686 1400 0249 E1411 00201 E1411 00602 E1411 00601 2 4 1 1 1 1 1 MECHANICAL PARTS Handle Kit Bottom H...

Страница 51: ...Figure 6 1 HP E1411A Replaceable Parts Chapter 6 Replaceable Parts 51 ...

Страница 52: ...1326 61601 E1326 61605 1 1 CABLE ASSEMBLIES Cable Assembly 6 Conductor Cable Assembly 4 Conductor 28480 28480 E1326 61601 E1326 61605 MP1 MP2 MP3 MP4 MP5 MP6 MP7 MP8 PNL1 SHD1 SHD2 E1400 45102 E1400 45101 1510 0091 1510 0091 1510 0091 1510 0091 8160 0686 1400 0249 E1411 00202 E1411 00612 E1411 00611 1 1 4 1 1 1 1 1 MECHANICAL PARTS Handle Bottom Metal Injection Handle Top Metal Injection Binding P...

Страница 53: ...Figure 6 2 HP E1411B Replaceable Parts Chapter 6 Replaceable Parts 53 ...

Страница 54: ...ame Address 00000 00779 06776 18873 24931 27264 28480 30817 59730 71707 75915 81073 Any satisfactory supplier AMP INC Robinson Nugent Inc Dupont E I DE Nemours Co Specialty Connector Co Molex Inc Hewlett Packard Company Instrument Specialties Co Inc Thomas Betts Corp Coto Wabash Littelfuse Inc Grayhill Inc Harrisburg PA 17111 New Albany IN 47150 Wilmington DE 19801 Franklin IN 46131 Lisle IL 60532...

Страница 55: ... 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 General Information for HP E1411 multimeter serial number information Chapter 7 Manual Changes 55 ...

Страница 56: ...56 Manual Changes Chapter 7 ...

Страница 57: ...driv or Torx drivers as specified in the instructions Pozidriv and Torx drivers used are listed in Table 8 1 Table 8 1 Pozidriv Torx Drivers Description HP Part Number No 1 Pozidriv No 2 Pozidriv 8710 0899 8710 0900 Size T 8 Torx Size T 10 Torx Size T 15 Torx 8710 1673 8710 1284 8710 1816 Service Aids There are no test points or manual adjustment locations for the HP E1411 multimeter Service aids ...

Страница 58: ...s Table 8 2 Self Test Errors Error Description Typical Causes 1 2 3 4 Multimeter does not respond to self test Invalid communication between A1 and A2 processors Data line between multimeter and mainframe failed Invalid communication between multimeter and mainframe Bad connections settings Incorrect operation Hardware failure exchange Bad A1 A2 communication Hardware failure exchange Bad connecti...

Страница 59: ...wlett Packard for exchange See Chapter 6 Replaceable Parts for procedures Table 8 3 HP E1411 Tests Checks Test Check Reference Designator Check Heat Damage Discolored PC boards Damaged insulation Evidence of arcing Switch Jumper Settings JM1 JM3 P3 SP1 IRQ Level setting LADDR setting Frame CBL1 CBL2 MP3 MP4 MP5 MP6 Cable contact damage Panel binding posts A1 Printed Circuit Assembly F1 F2 J2 J102 ...

Страница 60: ...le 8 3 for guidelines to isolate the problem to a user replaceable part Repair Guidelines This section gives guidelines to repair the HP E1411 multimeter including ESD precautions Removing top shield Removing front panel bottom shield Removing binding posts Soldering printed circuit boards Post repair safety checks ESD Precautions Electrostatic discharge ESD may damage MOS CMOS and other static se...

Страница 61: ...ure the assembly is placed on a pad of conductive material Also be sure you the pad and the soldering iron tip are grounded to the assembly Apply as little heat as possible when soldering Removing Top Shield Use the following steps to remove the top shield from the printed circuit assembly PCA See Figure 8 1 for component locations 1 Remove seven Torx T8 screws 2 Lift top shield from the back unti...

Страница 62: ...e the front panel and bottom shield from the printed circuit assembly PCA See Figure 8 2 for component locations 1 Remove Torx T8 screw from front panel 2 Remove two Torx T8 screws from PCA 3 Remove cable assembly from clip 4 Slide PCA off bottom shield 5 Reverse steps 1 through 4 to replace front panel and bottom shield Figure 8 2 Removing Front Panel 62 Service Chapter 8 ...

Страница 63: ...ircuit 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 dama...

Страница 64: ... mounting holes When using a suction device be sure the equipment is properly grounded to prevent electrostatic discharge from damaging CMOS devices Post Repair Safety Checks After making repairs to the HP E1411 multimeter inspect the multimeter for any signs of abnormal internally generated heat such as discolored printed circuit boards or components damaged insulation or evidence of arcing Deter...

Страница 65: ... Definition Multimeter accuracy is the expected accuracy of the measurement due ONLY to the multimeter The Low Limit entry in Table 4 1 is the lower value of multimeter accuracy while the High Limit entry is the upper value of multimeter accuracy Measurement Uncertainty Definition Measurement Uncertainty is the expected accuracy of the source used to input signals to the multimeter Since the Datro...

Страница 66: ...itions are 90 days since calibration Temperature within 5o C of calibration temperature Module calibration temperature 18o C to 28o C One hour warmup 4 wire ohms resistance measurements Aperture 16 7 msec 60 Hz or 20 msec 50 Hz Autozero ON DC Voltage Accuracy Equations From Appendix A Specifications of the HP E1326A E1411A User s Manual or the E1326B E1411B User s Manual DC voltage 90 day accuracy...

Страница 67: ...200 µV 00675 x 0 07 200 x 10 6 0 000673 Volts Thus for a 0 07 ACV input the High Limit in Table 4 1 0 070673 Volts and the Low Limit 0 069327 Volts 4 Wire Ohms Accuracy Equations From Appendix A Specifications of the HP E1326A E1411A or E1326B E1411B User s Manual 4 Wire resistance 90 day accuracy of reading Ohms The accuracy equations for the ranges and apertures used in the performance verificat...

Страница 68: ...f the Datron 4708 User s Handbook DC Voltage Option 10 Accuracy 90 days since calibration and 23o C 1o C follows where Datron Accuracy ppm OUTPUT ppm FS Datron OUTPUT DCV Datron Range Volts Datron Accuracy ppm Calibration Uncertainty ppm 0 1 0 9 7 0 58 0 300 0 1 0000000V 1 0000000V 10 000000V 100 00000V 1000 0000V 2 0 4 2 0 4 1 0 15 2 0 25 3 0 25 2 2 1 5 2 2 Example Calculate DC Voltage Measuremen...

Страница 69: ... 4708 range set to 100 mV at 60 Hz Measurement Uncertainty µV 60 0 x 0 07 2 x 20 x 1 5 30 x 07 1 16 3 µV 0 000016 V Or for a 300 ACV OUTPUT to the multimeter and the Datron 4708 range set to 1000 V at 5 kHz Measurement Uncertainty µV 90 0 x 300 0 10 x 1100 30 x 300 47000 µV 0 047 V Calculate Resistance Measurement Uncertainty From Section 6 Specifications of the Datron 4708 User s Handbook 4 Wire ...

Страница 70: ... 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 Since this value is 10 1 the entry in Table 4 1 is 10 1 70 Calculating Multimeter Accuracy Appendix A ...

Страница 71: ...e that the multimeter is communicating with the mainframe external controller and or external terminal include stdio h include sicl h define ADDR hpib7 9 03 Address of device void main INST id Define id as an instrument char a 256 0 Result variable id iopen ADDR Open instrument session ipromptf id TST n t a Self test command printf n s a Print result getchar Pause iclose id Close instrument sessio...

Страница 72: ...OR_EXIT id iopen ADDR Open instrument session iprintf id RST n Resets and set autozero ON and PLC to 1 iprintf id CAL LFR 60 n Sets line reference to 60 Hz ipromptf id MEAS VOLT DC 1 n t volt Measure 0 113 V range printf Voltage for 0 113 V range s n volt ipromptf id MEAS VOLT DC 9 n t volt Measure 0 91 V range printf Voltage for 0 91 V range s n volt ipromptf id MEAS VOLT DC 7 n t volt Measure 7 ...

Страница 73: ...ed __WIN32__ _InitEasyWin endif ionerror I_ERROR_EXIT Exit on error id iopen ADDR Open instrument session iprintf id RST n Resets and set autozero ON and PLC to 1 iprintf id CAL LFR 60 n Sets line reference to 60 Hz for i 0 i 5 i Take voltage measurements printf n Set DC Standard to 1f VDC volts i printf n press ENTER when ready n getchar iprintf id CONF VOLT DC f n range i Voltage range ipromptf ...

Страница 74: ...ror id iopen ADDR Open instrument session iprintf id RST n Resets and set autozero ON and PLC to 1 iprintf id CAL LFR 60 n Sets line reference to 60 Hz for i 0 i 5 i Take voltage measurements printf n 1 Set AC Standard output to 2f VAC source_volts i printf n 2 Set AC Standard frequency to 1f Hz source_freq i printf n 3 Press ENTER when ready n getchar iprintf id CONF VOLT AC f n source_volts i Se...

Страница 75: ... set autozero ON and PLC to 1 iprintf id CAL LFR 60 n Sets line reference to 60 Hz for i 0 i 3 i Take measurements printf n 1 Set Resistance Standard to 1f Ohms source i printf n 2 Measure ACTUAL resistance standard value in Ohms printf n 3 Enter ACTUAL resistance standard in Ohms scanf f actual i iprintf id CONF FRES f n range i Set resistance range ipromptf id OPC n s complete Wait for settling ...

Страница 76: ...e 5 256 int i if defined __BORLANDC__ defined __WIN32__ _InitEasyWin endif ionerror I_ERROR_EXIT Exit on error id iopen ADDR Open instrument session iprintf id RST n Resets and set autozero ON and PLC to 1 iprintf id CAL LFR 60 n Sets line reference to 60 Hz for i 0 i 10 i Take voltage measurements retry printf n Set DC Standard to 1f VDC volts i printf n press ENTER when ready n getchar iprintf i...

Страница 77: ...n endif ionerror I_ERROR_EXIT Exit on error id iopen ADDR Open instrument session iprintf id RST n Resets and set autozero ON and PLC to 1 printf id CAL LFR 60 n Sets line reference to 60 Hz retry printf n Set AC Standard to 5 6 Vac at 1 0 kHz printf n press ENTER when ready n getchar iprintf id FUNC VOLT AC n Set DCV function iprintf id VOLT RANG 5 6 n Set E1326B range iprintf id CAL VAL 5 6 n Se...

Страница 78: ...it on error id iopen ADDR Open instrument session iprintf id RST n Resets and set autozero ON and PLC to 1 iprintf id CAL LFR 60 n Sets line reference to 60 Hz for i 0 i 3 i Take voltage measurements retry printf n Set Resistance Standard to 1f Ohms source i printf n Measure ACTUAL Resistance Standard value in Ohms scanf f actual i iprintf id FUNC FRES n Set DCV function iprintf id FRES RANG f n r...

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