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HP 972a, User Manual, Page: 7 / 29

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Operation

Terminals, Shutter, & Test Leads

RED LEAD
Current Measurements
 (0 A to 10 A)
Frequency (Amps)  Measurements

RED LEAD
Current Measurements
 (0 to 400 mA)
Frequency (Amps)
Measurements

BLACK LEAD
COMMON
 ALL Measurements

RED LEAD
DC & AC Voltage,
Diode, Resistance,
Capacitance, Frequency (Volts),
Temperature, Continuity, and
dBm Measurements

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. 

1 - 7

Summary of Contents for 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 ...

Page 3: ...dure 1 14 Maintenance 1 15 Battery Replacement 1 15 Fuse Replacement 1 15 Troubleshooting 1 16 Cleaning 1 16 Replaceable Parts Accessories 1 16 Specifications 1 17 General 1 17 DC Voltage 1 17 AC Voltage HP 972A 1 18 AC Voltage HP 973A 1 18 AC DC Voltage HP 973A 1 19 DC Current 1 19 AC Current 1 20 Resistance 1 20 Continuity 1 20 Diode 1 20 Capacitance 1 20 Frequency Volts 1 21 Frequency Amps 1 21...

Page 4: ... test and the other probe disconnected exposed and readily accessible touchable Safety Symbols Indicates the operator must refer to an explanation in this manual Indicates terminals at which dangerous voltages may exist WARNING TO AVOID ELECTRICAL SHOCK or damage to the multimeter do not apply more than 1000 Vdc or 1000 Vrms between any terminal and earth ground Use caution when working with volta...

Page 5: ...aximum Overvoltage Limitations AC and DC Voltage Functions 1000V MAX indicates the maximum voltage between input terminals and earth is 1000 V dc or ac rms Do not use the multimeter on any ACV circuit where the maximum impulse overvoltage may be more than 4000Vpk or any DCV circuit where the maximum impulse overvoltage may be more than 2500Vpk between the COM and VOLT terminals Excessive impulse o...

Page 6: ... test leads whose insulation has cuts cracks or other damage that may result in reduced electric shock protection 2 Keep insulation surface clean between the probe tip connector and the finger guards 3 If probes other than the ones specified are to be used with the multimeter be sure the probes and their leads are rated for the voltage and current to which they will be subjected Do not exceed the ...

Page 7: ...CK LEAD COMMON ALL Measurements RED LEAD DC AC Voltage Diode Resistance Capacitance Frequency Volts Temperature Continuity and dBm Measurements 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 1 7 ...

Page 8: ...10 pF to 1000 µF Diode Test 0 to 2 V Auto Diode Test 0 to 2 V Ω Resistance 0 1 Ω to 40 MΩ Continuity alarm at 20 Ω Temperature in F 112 F to 302 F Temperature in C 80 C to 150 C mV DC volts 10 µV to 400 mV AC volts 10 µV to 400 mV dBm 59 9 to 5 7 dBm Temperature in F 58 F to 1292 F Temperature in C 50 C to 700 C V DC Volts 1 mV to 1000 V DC AC Volts to 1000 V V AC volts to 1000 V Frequency 1 2 Hz ...

Page 9: ...akes the last displayed measurement the reference Each measured value relative to the reference value difference Reference value Calculates the percentage change from the reference Each measured value as a percent change of the reference value Reference value Cancels the Relative function Measured Value Range Perform a zero adjust when using the 400 Ω range or 40 mV range and displayed value is le...

Page 10: ...values Each measured value Elapsed time Press and hold 1 second to cancel 1 Automatic power off and auto ranging are disabled when Min Max is selected Bargraph will indicate and hold the maximum values of the bargraph 2 Time is recorded and displayed in minutes up to the maximum recording time of 1999 minutes Recording will stop at the maximum time 3 H annunciator is displayed when Min Max recordi...

Page 11: ...display and hold the last stable reading Range Press Action Main Display Secondary Display Changes from auto ranging to manual ranging Measurement value Range Change manual range UP once with each keypress 1 Measurement value Range Returns to auto ranging when key is held for 1 second Measurement value Range 1 When upper range is reached the sequence begins again at the lowest range Select Press t...

Page 12: ... 3 2 F C Tcp 7 V 2 6 7 V 2 6 Hz Volts 6 3 4 dBm7 3 2 1 Zero adjust when display shows 99 on lowest range 5 Secondary display shows elapsed time in minutes 2 Secondary display shows reference value 6 Secondary display and bargraph updates with input value 3 Secondary display shows AC input voltage 7 Bargraph not available 4 Changes input attenuator frequency is always auto range Operation 1 12 ...

Page 13: ... a resistance of 20 Ω when using the Continuity function Auto Power Off Auto Power Save Pairs of beeps for 30 seconds Long beep just before power off Cancel by changing function switch position or pressing any key Low Battery indicator Replace batteries when on Secondary Display Shows Range most functions AC input value Frequency Reference value Relative Elapsed time Min Max Main Display Annunciat...

Page 14: ...page 6 5 2 Install new batteries described below and close the cover Turn the multimeter on and allow a 30 minute warm up Open the case 3 Set the multimeter function and range and the source output to the values specified at each step in the table on page 6 1 4 When appropriate make the adjustments indicated in the table to bring the multimeter display within the limits CAUTION Dangerous voltages ...

Page 15: ...h batteries at the same time Use high quality type AA alkaline IEC LR6 batteries Remove the batteries if the multimeter is to be stored for extended periods of time Refer to the disassembly drawing on page 6 5 Fuse Replacement 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 CAU...

Page 16: ...on Change test leads or function switch position Battery Annunciator on Low battery voltage Replace batteries Unable to measure current 10 A or mA µA Open input protection fuse Check fuse Connect test lead between V input terminal and 10A or mA µA terminal Unit will rapidly beep if fuse is OK Replace fuse if no beep Cleaning Wipe instrument with a soft rag dampened with soap and water Do not immer...

Page 17: ... 70 RH max no condensation Display reading rate ACV DCV Diode Continuity Approximately 2 3 second Frequency Approximately 1 second 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 Range Resolution 972A 973A Input Resistance Accuracy 40 mV 10 µV 0 3 5 0 3 5 10 MΩ nominal 400 m...

Page 18: ...e 2 seconds maximum AC Voltage HP 973A True rms calibrated for sinewave Range Resolution Accuracy Input Impedance nominal 40 Hz to 50 Hz 50 Hz to 1 kHz 1 kHz to 5 kHz 5 kHz to 20 kHZ 40 mV 10 µV 1 3 1 3 Not Specified 10 MΩ 70 pF 400 mV 0 1 mV 4 V 1 mV 0 7 3 1 2 4 2 15 11 MΩ 50 pF 40 V 10 mV 10 MΩ 50 pF 400 V 100 mV 1000 V 1 V 1 4 40 Hz to 500 Hz Not Specified Measurement range 40 Hz to 1 kHz 40 mV...

Page 19: ...rement range DC 40 Hz to 1 kHz 4 V to 400 V range 5 to 100 of range 1000 V range 200 V to 1000 V DC 1 kHz to 20 kHz 4 V to 400 V range 10 to 100 of range Response time 5 seconds on fixed range Crest factor 3 Common Mode Rejection Ratio 1 kΩ imbalance 60 dB DC to 60 Hz DC Current Range Resolution Accuracy Input Resistance Maximum Input 400 µA 100 nA 0 5 2 550 Ω 0 5 A fused 4000 µA 1 µA 0 8 2 40 mA ...

Page 20: ...mΩ 0 2 1 1 0 8 mA 3 2 V 4 0 kΩ 1 Ω 0 2 1 80 µA 1 1 V 40 kΩ 10 Ω 10 µA 400 kΩ 100 Ω 1 1 µA 4 0 MΩ 1 kΩ 0 5 1 110 nA 40 MΩ 10 kΩ 1 2 1 1 After zero adjust of input leads Zero adjust range up to 9 9 Ω Continuity Measurement Current 0 8 mA maximum Open circuit voltage 3 2 Vpeak Displayed resistance 0 Ω to 400 Ω Input protection 660 Vrms sinewave Alarm Tone when input 20 Ω Resolution 100 mΩ Diode Measu...

Page 21: ...acy Input Voltage rms Maximum Input 2 Hz to 99 99 Hz 0 01 Hz 0 02 1 0 2 V to 400 V 660 Vrms 90 Hz to 999 0 Hz 0 1 Hz 900 Hz to 9999 Hz 1 Hz 0 4 V to 400 V 9 00 kHz to 99 99 kHz 10 Hz 0 8 V to 100 V 100 Vrms 90 kHz to 200 kHz 100 Hz 2 V to 100 V Frequency Amps Frequency Range Resolution Accuracy Input Current rms Maximum Input 2 Hz to 99 99 Hz 0 01 Hz 0 02 1 50 µA to 10 A 15 A fused 90 Hz to 999 0 ...

Page 22: ...esolution 1 1 Accuracy 1 2 2 2 4 1 Accuracy does not include K type Thermocouple error dBm HP 973A 600 Ω 1 mW reference Function Input dBm Input Voltage Accuracy 40 Hz to 1 kHz 1 kHz to 5 kHz 5 kHz to 20 kHz ACmV 51 8 dBm to 5 7 dBm 2 0 mV to 400 mV 0 3 dBm Not specified AC V 11 8 dBm to 5 7 dBm 0 2 V to 0 4 V 0 2 dBm 5 7 dBm to 53 3 dBm 0 4 V to 360 V 0 2 dBm 0 7 dBm 53 3 dBm to 62 2 dBm 360 V to...

Page 23: ... should only be performed by qualified service technicians Use a non conductive tool Step Function Range Input Signal Adjustment limits Tolerance counts 972A 973A 1 mV 400 mV Short 1 1 2 380 0 mV 1 1 8 4 3 40 mV 38 00 mV 2 1 18 16 4 V 400 V 380 0 V 3 1 8 4 5 4 V 3 800 V 4 1 8 4 6 40 V 38 00 V 5 1 8 4 973A 972A 6 1 ...

Page 24: ...Hz 120 91 14 40 V 38 00 V 5 kHz C3 3 60 49 15 38 00 V 100 Hz 21 29 16 38 00 V 20 kHz 120 91 17 mV 40 mV 38 00 mV 100 Hz 7 2 48 41 18 400 mV 380 00 mV 100 Hz 41 41 19 V 1000 V 1000 V 100 Hz 12 14 20 µA 400 µA 380 0 µA 21 21 21 4000 µA 3800 µA 32 32 22 mA 40 mA 38 00 mA 32 32 23 400 mA 380 0 mA 40 40 24 10 A 10 A 10 00 A 8 2 12 12 25 µA 400 µA 380 0 µA 100 Hz 61 61 26 380 0 µA 2 kHz 61 61 27 4000 µA...

Page 25: ...Ω 8 8 37 4 kΩ 3 800 kΩ 8 8 38 40 kΩ 38 00 kΩ 8 8 39 400 kΩ 380 0 kΩ 8 8 40 4 MΩ 3 800 MΩ 20 20 41 40 MΩ 38 00 MΩ 40 40 42 400 Ω 0 Ω to 100 Ω Tone below approx 20 Ω 43 2 V 1 000 V 12 12 44 100 µF 90 0 µF 9 2 29 29 45 10 µF 9 00 µF 10 2 12 12 46 10 nF Open zero adjust 1 1 1 47 100 nF 90 0 nF 11 2 21 21 48 10 nF 9 00 nF 21 21 49 1000 nF 900 nF 12 12 50 1000 µF 900 µF 29 29 51 Hz V 4 V 9000 Hz 1 Vrms ...

Page 26: ... Bottom case assembly includes stand 00972 64402 Replacement Test Leads 2 pair E2305A Temperature probe 5 KΩ Thermistor E2308A Surface temperature sensor Thermistor 0 1 C 12 lead requires dual banana plug 40653B Temperature probe K type thermocouple for 973A only E2307A Rubber Boot 00971 86001 Soft Case fits meter with rubber boot E2304A Operator protection from electric shock hazard is provided b...

Page 27: ...Disassembly WARNING Always disconnect the test leads before opening the case Replaceable Parts Accessories 6 5 ...

Page 28: ...1010 1 1992 UL 1244 EMC CISPR 11 1990 EN55011 1991 Group 1 Class A IEC801 2 1991 EN50082 1 1992 4 kV CD 8 kV AD IEC 801 3 1984 EN50082 1 1992 3 V m IEC 801 4 1988 EN50082 1 1992 0 5 kV Signal Lines Supplemental Information The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC amended by 93 68 EEC inclusive 93 68 EEC and carries ...

Page 29: ...SS IS LIMITED TO THE THREE YEAR DURATION OF THIS WRITTEN WARRANTY Some states provinces or countries do not allow the exclusion or limitation or incidental or consequential damages so the above limitation or exclusion may not apply to you The warranty gives you specific legal rights and you may also have other rights which vary from state to state province to province or country to country Service...

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