Related Manuals for HP 972a
Summary of Contents for HP 972a
- Page 1 HP 972A and 973A Multimeter User’s Guide Part Number 00972-90002 March 1995 © Copyright Hewlett-Packard Company 1994, 1995 All Rights Reserved...
- Page 2 972A 973A...
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Page 3: Table Of Contents
Maintenance ....1-15 dBm HP 973A ....1-22 Battery Replacement ... 1-15 Adjustments . -
Page 4: 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 5: 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 6: Probes And Test Leads
Safety Summary Function Maximum Operating Input ± 10 A (dc or ac rms) / 600 V 10 A mA or µA ± 500 mA (dc or ac rms) / 250 V Capacitance, Diode Test, Resistance, Continuity, 660 Vrms (sinewave) Temperature 660 V rms 2 Hz to 10 kHz Frequency 100 V rms 10 kHz to 200 kHz... -
Page 7: 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 8: Function Switch
Function Switch HP 972A HP 973A Switch Display Position DC Current AC Current Frequency (10 mA to 10 A) (10 mA to 10 A) (2 Hz to 10 kHz) DC Current AC Current Frequency (10 µA to 0.4 A) (10 µA to 0.4 A) -
Page 9: Function Keys
Operation Function Keys Power Automatic power off 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 10 Operation Minimum/Maximum Press Action Main Display Secondary 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 11 Press this key to use the functions indicated in yellow on the multimeter. See table on page 1-8. To test display, hold this key when turning meter on. HP 973A: Not all annunciators turned on during the display test. 1 - 11...
- Page 12 Operation Function Keys and Function Switch Matrix Function Relative Min/Max Average Data Hold Auto-Hold Range (Percent) • • • • • • • µA, mA • • • • • • • • Hz(Amps) • • • • • • •...
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Page 13: Display
Display Secondary Display Shows: Low Battery indicator Range (most functions) Replace batteries when on. AC input value (Frequency) Reference value (Relative/%) Elapsed time (Min/Max) Main Display (Annunciators shown inside front cover) Bargraph Number of digits is set by range and function Active for all functions except: Displays O.L to indicate an overload condition Capacitance, Temperature,... -
Page 14: 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 described on page 6-5. -
Page 15: 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 the 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 16: 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 17: Specifications
Capacitance Approximately 0.03 to 2/second AC + DC Approximately 0.5 to 1/second Bargraph reading rate: Approximately 23/second Battery life: Approximately 600 hours DC Voltage 972A 973A Range Resolution Input Resistance Accuracy 10 µV ± (0.3% + 5) ± (0.3% + 5) 40 mV 10 MΩ... -
Page 18: Ac Voltage Hp 972A
Specifications AC Voltage HP 972A (Average responding, calibrated to display rms) Accuracy Input Impedance Range Resolution 40 Hz to 50 Hz to 1 kHz to 5 kHz to (nominal) 50 Hz 1 kHz 5 kHz 20 kHZ 10 µV ± (1% + 10) -
Page 19: Ac + Dc Voltage Hp 973A
Specifications AC + DC Voltage HP 973A (True rms, computed from acV, dcV) Accuracy Input Range Resolution Impedance DC, 40 Hz to DC, 1 kHz to DC, 5 kHz to (nominal) 1 kHz 5 kHz 20 kHZ 1 mV 11 MΩ < 50 pF ±... -
Page 20: Ac Current
100 µA 400 mA < 0.05 Ω 10 A 10 mA 15 Arms (fused) HP 972A average responding HP 973A rms responding, crest factor <3, specified for 5% to 100% of range Resistance Max Open Range Resolution Accuracy Test Current Circuit Voltage 400 Ω... -
Page 21: Capacitance
Specifications Capacitance Range Resolution Accuracy 10 nF 10 pF ± (2% + 3) 100 nF 100 pF 1000 nF 1 nF ± (1.2% + 2) 10 µF 10 nF 100 µF 100 nF ± (3% + 2) 1000 µF 1 µF After zero adjust of input leads Method used: Charge/Discharge of capacitor under test Maximum display 1199... -
Page 22: Temperature
Resolution 1° 1° ± (2% + 2°) ± (2% + 4°) Accuracy Accuracy does not include K type Thermocouple error dBm HP 973A (600 Ω, 1 mW reference) Accuracy Function Input dBm Input Voltage 1 kHz to 5 kHz to... -
Page 23: Adjustments
Adjustments 973A 972A Calibration Table CAUTION Dangerous voltages are present during the calibration procedure. Calibration should only be performed by qualified service technicians. Use a non-conductive tool. Tolerance (counts) Adjustment Step Function Range Input Signal (limits) 972A 973A ±1 ±1 Short —... - Page 24 Calibration Table Tolerance (counts) Adjustment Step Function Range Input Signal (limits) 972A 973A ±3 ±3 1000 V 1000 V — ±21 ±29 380.0 V @ 100 Hz 6A or 6B (±2) ±60 ±49 400 V 380.0 V @ 5 kHz C1 (±3)
- Page 25 Calibration Table Tolerance (counts) Adjustment Step Function Range Input Signal (limits) 972A 973A ±61 ±61 38.00 mA @ 100 Hz — 40 mA ±61 ±61 38.00 mA @ 2 kHz — ±61 ±61 380.0 mA @ 100 Hz — 400 mA ±61...
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Page 26: 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 27: Disassembly
Replaceable Parts/Accessories Disassembly WARNING Always disconnect the test leads before opening the case. 6 - 5... -
Page 28: 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 29 Limited 3 Year Warranty What is Covered The HP 972A or HP 973A 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.