7-1
7. Troubleshooting
7.1. Introduction
This chapter describes trobleshooting procedures than can be used to
isolate problems with the meter.
Warning
Opening the case may expose hazardous voltages. Always disconnect
the power cord and measuring inputs before opening the case. And
remember that repairs or servicing should be performed only by
qualified personnel.
Caution
Handle the PCB Assembly by its edges or while wearing gloves; avoid
contaminating the PCB Assembly with oil from tour fingers.
A contaminated PCB Assembly may not cause immediate instrument
failure in controlled environments. Failures typically show up when
contaminated units are operated in humid areas.
7.2. Troubleshooting guide
If you experience trouble with your instrument, try these corrective
actions before concluding that the instrument needs repair.
1. Make sure you are using fresh NI-MH battery pack or fully charged
rechargeable battery pack. If you are using the AC/DC power
adapter, make sure the adapter is plugged into an appropriate live
power source.
2. If the buttons do not respond to your control or the contrast is set
such that the display is unreadable, remove the power source
while the instrument is on. Wait 15 minutes and then restore power
and try operations.
3. If you still experience difficulty, check your connections and reread
the usage instructions.
4. If meter is frozen while you control the trigger level:
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