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: 6 Months

1Disconnect all inputs from the multimeter and open the case as described on page 6-5.

2Install new batteries (described below) and close the cover. Turn the multimeter on and allow a 30 minute warm-up. Open the case.

3Set the multimeter function and range and the source output to the values specified at each step in the calibration table on page 6-2.

4When appropriate, make the adjustments indicated in the calibration table to bring the multimeter display within the limits.

CAUTION

Dangerous voltages are present during the calibration procedure. Calibration should only be performed by qualified service technicians Use a non-conductive adjustment tool.

1-14

Page 14

Image 14

HP Video Game 00974-90002 manual Calibration and Adjustment, Required Test Equipment, Calibration Procedure

Contents

HP 974A Multimeter User’s Guide Page Table of Contents HP 974A Multimeter Safety Summary Safety Symbols Safety Summary Maximum Overvoltage Limitations AC and DC Voltage Functions Probes and Test Leads Function Maximum Operating Input Operation Terminals, Shutter, & Test Leads Function Switch Switch Display Position Function Keys Press Action Main Display Secondary Display Minimum/Maximum Action Main Display Secondary Display Hold/Auto-Hold Data Hold Auto-Hold Range Percent Function Keys and Function Switch MatrixFunction Relative Min/Max Display Power onAuto Power Off Audio Required Test Equipment Calibration and AdjustmentCalibration Procedure Fuse Replacement MaintenanceBattery Replacement Replaceable Parts/Accessories TroubleshootingCleaning Problem Possible Cause Suggested Action General SpecificationsRange Resolution Accuracy Input Resistance DC Voltage AC + DC Voltage rms responding, computed from acV, dcV DC Current, AC Current 40 Hz to 1 kHz, 5% to 100% of range Diode ResistanceContinuity Frequency AC Coupled Temperature 5 kΩ @ 25C Thermistor probe Adjustments Limit Counts Step Function Range Input Signal AdjustmentCalibration Table Step Function Range Input Signal Replaceable Parts/Accessories Call out Description HP Part Number Disassembly Manufacturer’s Address Conforms to the following Product SpecificationsManufacturer’s Name Declares, that the products What is Not Covered Warranty/ServiceWhat is Covered