Troubleshooting; Cleaning; Replaceable Parts/Accessories - HP 974A User Manual

Maintenance

Troubleshooting

Problem
Unit won't turn on
Unit won't turn off
Display flashes and Rapid
beeps
Battery Annunciator on
Unable to measure current
10 A or mA - µA

Cleaning

Wipe instrument with a soft rag dampened with soap and water. Do not immerse in water.
Do not use chemical cleansers or solvents.

Replaceable Parts/Accessories

Refer to the disassembly diagram on page 6-5.
1-16
Possible Cause
Dead Batteries
Input limit exceeded
Input limit exceeded
Low battery voltage
Blown input protection fuse
Suggested Action
Replace batteries
Remove test leads and press any key to reset.
Remove test leads and press any key to reset.
Replace batteries
Replace fuse(s)