HP 971A - Troubleshooting Guide

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.
Display flashes
and
Rapid beeps
Input limit exceeded
Remove test leads and press any key to reset.
Test leads in wrong
terminal for measurement
function
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 10 mA µA terminal. Select
10A or 10mA range, 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 immerse in water.
Do not use any chemical cleaner or solvents.
Replaceable Parts/Accessories
Refer to the table on page 6-4.
Maintenance
1-16