HP Video Game Keyboard 00974-90002 Manuel d'utilisateur Page 1

HP 974A MultimeterUser’s GuidePart Number 00974-90002 March 1995© Copyright Hewlett-Packard Company 1994, 1995 All Rights Reserved

Minimum/Maximum 1 Press Action Main Display Secondary Display 2 Begin recording of min, max, and avg 3 valuesEach measured value Elapsed timeDisplay r

Hold/Auto-HoldPress Action Main Display Secondary DisplayHolds the measurement value in thedisplayMeasurement value whenhold pressedRangeEnters Auto-H

Function Keys and Function Switch MatrixFunction Relative%(Percent)Min/Max 3 Average Data Hold Auto-Hold Range µA, mA, 10A•••••• µA, mA, 10A••••••••

DisplayAudioPower on First beep at power on. Second beep when beginning to make measurements.Single beep Indicates any valid function key press.Indica

Calibration and AdjustmentRequired Test EquipmentThe source used for the calibration should have an output accuracy as good or better thanthat listed

MaintenanceOperator protection from electric shock hazard is provided by a double insulated enclosure.Refer to pages 1-4 and 1-5 for maximum voltage s

TroubleshootingProblem Possible Cause Suggested ActionUnit won’t turn on Dead BatteriesReplace batteriesUnit won’t turn off Input limit exceededRemove

SpecificationsCalibration period: six months minimum. Specifications apply at 23°C ± 5°C, < 80% RHAccuracy = ± (% of reading + number of digits)

AC + DC Voltage (rms responding, computed from acV, dcV)Range ResolutionAccuracyDC, 20 Hz to 10 kHzDC, 10 kHz to30 kHzDC, 30 kHz to50 kHZDC, 50 kHz to

ResistanceRange Resolution Accuracy Test CurrentMax Open CircuitVoltage500 Ω 10 mΩ± (0.06% + 2) 1 < 800 µA< 5.5 V5.0 kΩ 100 mΩ ± (0.06% + 2) 50

Temperature (5 kΩ @ 25°C Thermistor probe)°C °FMeasurement Range-80° to 150° -112° to 302° Resolution0.1° 0.1°Accuracy 1 ± 0.2°± 0.4°1 Accuracy does n

Adjustments6-1

Calibration TableCAUTIONDangerous voltages are present during the calibration procedure. Calibration should only beperformed by qualified service tech

Step Function Range Input SignalAdjustment(limit)Tolerance(counts)17 V50 V48.000 V @ 10 kHzC3 (±20) ±27018 48.000 V @ 100 kHz —±174019 48.000 V @ 200

Replaceable Parts/AccessoriesRefer to the disassembly diagram on page 6-5.Call out Description HP Part NumberF1Fuse, 500 mA, 250 V fast blow Littlefus

DisassemblyWARNINGAlways disconnect the test leads before opening the case.Replaceable Parts/Accessories6-5

DECLARATION OF CONFORMITYaccording to ISO / IEC Guide 22 and EN 45014Manufacturer’s Name: Hewlett-Packard Company, Personal Measurements OperationManu

Warranty/ServiceLimited 3 Year WarrantyWhat is CoveredThe HP 974A Multimeter is warranted by Hewlett-Packard against defects in materials andworkmansh

HP 974A MultimeterTable of ContentsSafety Summary . . . . . . . . . . . . . . . 1-4Safety Symbols . . . . . . . . . . . .

Safety SummaryThe CAUTIONS and WARNINGS which appear on the following pages must be followed toensure operator safety and to retain the operating cond

WARNING POSSIBLE ELECTRICAL SHOCK. Calibration and performance tests are to be performed byqualified personnel only. Do not attempt calibration or tes

Function Maximum Operating Input 10 A± 10 A (dc or ac rms) / 600 V mA or µA ± 500 mA (dc or ac rms) / 250 VResistance, Diode Test, Temperature, Cont

OperationTerminals, Shutter, & Test LeadsRED LEADCurrent Measurements (0 A to 10 A)RED LEADCurrent Measurements (0 to 400 mA)BLACK LEADCOMMON ALL

Function SwitchSwitch PositionDisplay10ADC Current (1 mA to 10 A)AC Current(1 mA to 10 A)500 mADC Current(10 µA to 0.5 A)AC Current (10 µA to 0.5 A)50

Function KeysPowerAutomatic power off after 30 minutes. Alarm sounds 30 seconds before automatic power off.Press any key or change any function to can