Chapter Xiii System Prompts And Trouble-Shooting; Definitions Of System Prompts; Troubleshooting - UNI-T UTD2000 Series User Manual

Chapter XIII System Prompts and

13.1 Definitions of System Prompts

Adjustment at Ultimate Limit: This informs you that the multifunction control knob
has reached its adjustment limit in the current status. No further adjust is possible. When
the vertical deflection factor switch, time base switch, X shift, vertical shift and trigger level
adjustments have reached their ultimate limits, this prompt will appear.
USB Device Installed: After a USB device is plugged into the oscilloscope, this
prompt appears when the connection is valid.
USB Device Unplugged: After a USB key is unplugged from the oscilloscope, this
prompt appears.
Saving: When the oscilloscope is saving a waveform, this prompt is shown on the
screen. A progress bar appears at the bottom.
Loading: During waveform recall, this prompt is shown on the screen. A progress bar
appears at the bottom.

13.2 Troubleshooting

(1) If the screen of your oscilloscope remains black without any display after powering
on, follow the steps below to find the cause :
① Check the power cable connection and check if there is normal power supply.
② Check if the power switch is properly pressed.
③ Restart the unit after performing the above checks.
④ If the unit still fails to work, contact UNI-T to request service.
(2) If no waveform is displayed after you have acquired a signal, follow the steps
below to find the cause:
① Check whether the probe is properly connected to the signal lead.
② Check whether the signal lead is properly connected to the BNC (channel
adaptor).
③ Check whether the object for measurement is generating signals (connect the
channel with signals to the question able channel to find the cause).
④ Restart the acquisition process.
(3) The measurement voltage amplitude value is 10 times larger or smaller than the
actual value:
Check if the channel attenuation factor corresponds with the probe attenuation
you have chosen.
(4) There is waveform display but it is not stable :
① Check the trigger Source setup in the trigger menu. See whether it is the
same as the actual signal input channel.
② Check the trigger type: Use Edge trigger for ordinary signals and Video trigger
Trouble-shooting
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UTD2000 Series User Manual