11-1
11. Appendices
11.1. 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 Li-ION 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:
If you set the trigger level to normal (NOR) mode, trigger level must be the same level of
waveform. Meter does not trigger if trigger level set above or below waveform.
If you set the trigger level to Auto (AT) mode, you do not need to control the trigger level.
In rare cases, your instrument may require servicing. There are no user-serviceable parts inside
the instrument. For service, return the instrument to your customer service center.
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