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2
Service and Maintenance
Troubleshooting
To avoid electrical shock, do not perform any service unless you are qualified
WARNING
to do so.
If the instrument fails to operate, check the batteries and the test leads. Replace
them if necessary. And if the instrument still does not function, check the
operating procedures in this manual. When servicing, use only the specified
replacement parts.
The table below will assist you in identifying some basic malfunctions.
Table 2-1
Operating checklist
Mal function
No display when powered ON using the rotary switch
Auto powered OFF after powered ON for a while
No backlight when the
No flashlight when the
1 second.
No continuity visual alert (flashing backlight when
measuring less than the threshold resistance)
42
/
key is pressed.
is pressed for more than
Identification
✔ Verify the batteries health and replace batteries as necessary.
✔ Verify the auto power-off (APO) function is enabled in the clamp
meter's Setup mode.
✔ Verify that the backlight function is enabled in the clamp
meter's Setup mode.
✔ Verify that the flashlight function is enabled in the clamp
meter's Setup mode.
✔ Verify that the continuity visual alert is enabled in the clamp
meter's Setup mode.
Keysight U1190A Series Service Guide
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