Chapter 14 System Prompts And Troubleshooting; System Prompt Information Description; Trouble Shooting - UNI-T UPO2000E Series User Manual

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Chapter 14 System Prompts

14.1 System Prompt Information Description

Operation at limit: In the current state, adjustment has reached the limit and cannot continue. When the vertical scale knob,
time base knob, level shift, vertical shift or trigger level, etc. reaches the adjustment limit, the prompt will show up.
USB device is not inserted: This prompt appears if you select USB as storage disk but not connected with USB storage device.
Load Failed: When loading a saved setting or waveform, this prompt appears if there is no stored setting or waveform in
the memory location.

14.2 Trouble Shooting

(1) When the power button is pressed and the oscilloscope is black screen:
①

Check the power supply connection and check power supply is normal or not.
② Make sure the power switch at the back of the oscilloscope is open, press the front panel power key and confirm green
light and a relay sound is present.
③ If there is a relay sound, it indicates that the oscilloscope starts normally. Try the following operations: press the
DEFAULT key, then press F1, if device returns to normal, it means backlight brightness is too low.
④ After completing the above steps, restart the oscilloscope.
⑤ If you still cannot use this product normally, please contact UNI-T.
(2) After signal acquisition, waveform does not appear on display:
① Check if the probe is connected to the signal test point.
② Check if the signal line is connected to the analog channel input.
③ Check if the analog channel input of the input signal is consistent with the opened channel.
④ Connect the probe to the probe compensation signal connector on oscilloscope's front panel and check whether the
probe is normal.
⑤ Check to see if there is a signal to be detected (solve the problem by comparing the channel with signal generated and
the one with problem).
⑥ Press AUTO button for signal re-acquisition.
(3) The measured voltage amplitude value is 10 times larger or smaller than the actual value:
Make sure the probe attenuation coefficient in the channel matches the attenuation of the probe used.
Storage Type
Frequency Meter
Measurement
Cursor
Language
Menu Display
Square Wave Output
Backlight Brightness
Output Selection
and Troubleshooting
Waveform
Off
Off, clear all measurements
Off
Keep the settings that saved
at shutdown
Manual
1kHz
30%
Keep the settings that saved
at shutdown
58