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HP 971A User Manual

HP 971A User Manual

Multimeter
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About this Manual
We've added this manual to the Agilent website in an effort to help you support
your product. This manual is the best copy we could find; it may be incomplete
or contain dated information. If we find a more recent copy in the future, we will
add it to the Agilent website.
Support for Your Product
Agilent no longer sells this product. Our service centers may be able
to perform calibration and repair if necessary, but no other support from
Agilent is available. You will find any other available product information on the
Agilent Test & Measurement website, www.tm.agilent.com.
HP References in this Manual
This manual may contain references to HP or Hewlett-Packard. Please note that
Hewlett-Packard's former test and measurement, semiconductor products and
chemical analysis businesses are now part of Agilent Technologies. We have
made no changes to this manual copy. In other documentation, to reduce
potential confusion, the only change to product numbers and names has been in
the company name prefix: where a product number/name was HP XXXX the
current name/number is now Agilent XXXX. For example, model number
HP8648A is now model number Agilent 8648A.

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Summary of Contents for HP 971A

  • Page 1 Agilent Test & Measurement website, www.tm.agilent.com. HP References in this Manual This manual may contain references to HP or Hewlett-Packard. Please note that Hewlett-Packard's former test and measurement, semiconductor products and chemical analysis businesses are now part of Agilent Technologies. We have made no changes to this manual copy.
  • Page 2 HP 971A Multimeter User’s Guide Part Number 00971-90002 March 1995 © Copyright Hewlett-Packard Company 1994, 1995 All Rights Reserved...

  • Page 4: Table Of Contents

    HP 971A Multimeter Table of Contents Safety Summary ....1-4 Specifications ....1-17 Safety Symbols .

  • Page 5: Safety Summary

    Safety Summary The CAUTIONS and WARNINGS which appear on the following pages must be followed to ensure operator safety and to retain the operating condition of the Multimeter. 1. Do not use this product beyond its specifications or for uses not intended for this product as identified by the product functions, ranges, and hazards as indicted below.

  • Page 6: Maximum Overvoltage Limitations

    Safety Summary WARNING POSSIBLE ELECTRICAL SHOCK. Calibration and performance tests are to be performed by qualified personnel only. Do not attempt calibration or test procedures unless qualified to do so. CAUTION To avoid damage to the multimeter for inputs above 250 Vdc or Vac, disconnect the test leads before changing functions.

  • Page 7: Probes And Test Leads

    Safety Summary Function Maximum Operating Input 10 A (dc or ac rms) / 600 V 10 A mA or A 500 mA (dc or ac rms) / 250 V Diode Test, Resistance 660 Vrms (sinewave) Continuity, Temperature 660 Vrms (5 Hz to 10 kHz) Frequency 100 Vrms (10 kHz to 100 kHz) 1000 Vdc or Vrms (sinewave)

  • Page 8: Operation

    Operation Terminals, Shutter, & Test Leads SAFETY SHUTTER Slide up to open shutters for current measurement inputs. Must have the function switch in one of the Current Measurement positions to open shutter. Close shutter to change function switch to any other measurement function.

  • Page 9: Function Switch

    Operation Function Switch Switch Display Position DC Current AC Current (10 mA to 10 A) (10 mA to 10 A) DC Current AC Current (10 A to 0.4 A) (10 A to 0.4 A) DC Current AC Current (0.1 A to 4 mA) (0.1 A to 4 mA) Diode Test Auto Diode Test...

  • Page 10: Function Keys

    Operation Function Keys Power Automatic power off/power save after 30 minutes. Alarm sounds 30 seconds before power off. Power off if input < 80 V or < 400 mA. Power save if input > 80 V or > 400 mA, last measurement displayed, power consumption is reduced.
  • Page 11 Operation Minimum/Maximum Secondary Press Action Main Display Display Begin recording of Each measured value Elapsed time minimum and maximum values Display recorded maximum Maximum measurement Time of maximum Display recorded minimum Minimum measurement Time of Minimum Display last recorded measurement Latest measurement Elapsed time Pause recording of...
  • Page 12 Operation Hold/Auto-Hold Secondary Press Action Main Display Display Measurement value when Holds the measurement value in the display Range hold pressed Enters Auto-Hold function Input value Range Cancels Hold function Measurement value Range Auto-Hold Operation. When measurement becomes stable, multimeter will beep and save the stable reading.
  • Page 13 Operation Function Keys and Function Switch Matrix Function Relative Min/Max Average Data Hold Auto-Hold Range (Percent) A, mA F, C Invokes zero adjust when display is less than 9.9 Bargraph not available. Changes input attenuator, frequency is always auto range. Bargraph updates with input value.

  • Page 14: Display

    Operation Display Secondary Display Shows: Low Battery indicator Range (most functions) Replace batteries when on. Elapsed time (Min/Max) Main Display (Annunciators shown inside front cover) Number of digits is set by range and function Displays O.L to indicate an overload condition Entire display flashes if: Bargraph Input overvoltage or...

  • Page 15: Calibration And Adjustment

    Calibration and Adjustment Required Test Equipment The source used for the calibration should have an output accuracy as good or better than that listed in the specifications. Calibration Procedure Environmental range for calibration: 23 C 5 C, < 80% RH Calibration interval: 1 Year Disconnect all inputs from the multimeter and open the case as shown on page 6-5.

  • Page 16: Maintenance

    Fuse locations are shown in the diagram on page 6-5. Fuses are listed in the replaceable part list on page 6-4. See fuse check procedure in Troubleshooting table below. CAUTION For continued protection use only the specified manufacturer part number or HP part number fuse for replacement purposes. 1-15...

  • Page 17: Troubleshooting

    Maintenance Troubleshooting Problem Possible Cause Suggested Action Unit won’t turn on Dead Batteries Replace batteries Unit won’t turn off Input limit exceeded Remove test leads and press any key to reset. Input limit exceeded Remove test leads and press any key to reset. Display flashes Test leads in wrong Rapid beeps...

  • Page 18: Specifications

    Specifications Calibration period: one year minimum. Specifications apply at 23 C 5 C, < 80% RH Accuracy = (% of reading + number of digits). Temperature Coefficient = Accuracy X 0.1/ C (-10 C to 18 C; 28 C to 55 C) General Do not expose product to moisture or rain.

  • Page 19: Ac Voltage

    Specifications AC Voltage (Average responding, calibrated to display rms) Accuracy Range Resolution Input Impedance (nominal) 40 Hz to 500 Hz 500 Hz to 1 kHz 400 mV 0.1 mV 10 M < 50 pF 1 mV 11 M < 50 pF (1.5% + 4) (1% + 2) 40 V...

  • Page 20: Ac Current

    Specifications AC Current (Average responding, 40 Hz to 500 Hz, calibrated to display rms) Input Range Resolution Accuracy Maximum Input Resistance 100 nA 400 A < 550 4000 A 0.5 Arms (fused) 40 mA (1.5% + 5) < 8 400 mA 10 A 10 mA 15 Arms (fused)

  • Page 21: Diode

    Specifications Diode Measurement current: +0.5 mA nominal @ 0.6 V Open circuit voltage: < 3.2 Vpeak Displayed Voltage: 0 V to 2.000 V Input protection: 660 Vrms (sinewave) Accuracy: (1% + 2) Resolution: 1 mV Temperature (5 k @ 25 C Thermistor probe) Measurement -80 to 150 -112 to 302...

  • Page 22: Adjustments

    Adjustments...

  • Page 23: Calibration Table

    Calibration Table CAUTION Dangerous voltages are present during the calibration procedure. Calibration should only be performed by qualified service technicians using a non-conductive tool. Adjustment Tolerance Step Function Range Input Signal (limits) (counts) Short — 400 mV 380.0 mV RV1 ( 1) -380.0 mV —...
  • Page 24 Calibration Table Adjustment Tolerance Step Function Range Input Signal (limits) (counts) 10 A 10.00 A RV6 ( 2) 10 A 400 A 380.0 A @ 100 Hz — — 4000 A 3800 A @ 100 Hz 40 mA 38.00 mA @ 100 Hz —...

  • Page 25: Replaceable Parts/Accessories

    Replaceable Parts/Accessories Refer to the disassembly diagram on page 6-5. Call out Description HP Part Number Fuse, 500 mA, 250 V fast blow Littlefuse 216-500 2110-0940 DO NOT SUBSTITUTE Fuse, 15 A, 600 V fast blow Littlefuse KLK15 2110-0941 DO NOT SUBSTITUTE...

  • Page 26: Disassembly

    Replaceable Parts/Accessories Disassembly WARNING Always disconnect the test leads before opening the case.

  • Page 27: Declaration Of Conformity

    Manufacturer’s Name: Manufacturer’s Address: 815 14th Street S.W., Loveland, Colorado 80537 U.S.A. declares, that the products Handheld Multimeter Product Name: HP 971A, HP 972A, HP 973A, HP 974A Model Number: Product Options: None conforms to the following Product Specifications: Safety: IEC 1010-01 (1990) Incl.
  • Page 28 Limited 3 Year Warranty What is Covered The HP 971A Multimeter is warranted by Hewlett-Packard against defects in materials and workmanship for three years from the date of original purchase. If you sell your unit or give it as a gift, the warranty is automatically transferred to the new owner and remains in effect for the original three year period.

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