MS400 EXTECH [Extech Instruments Corporation.], MS400 Datasheet - Page 46

• Manufacturer Part Number: MS400
• Description: Handheld Digital Storage Oscilloscope & Multimeter
• Manufacturer: EXTECH [Extech Instruments Corporation.]

Troubleshooting
1. The oscilloscope will not Power ON
2. The oscilloscope shuts OFF after operating for only several seconds
3. The measurement displays ERR when in the multimeter mode
4. The measured voltage amplitude value is 10 times larger or smaller
5. In the Oscilloscope mode, the Waveform is displayed but is not
6. There is no display on the screen when the RUN/STOP key is pressed
7. The display speed is unusually slow when attempting to select the
while in the oscilloscope mode
stable
while in the oscilloscope mode
average sampling in the sampling mode or while selecting a longer
display time in the display mode for the oscilloscope
The battery may need recharging. The oscilloscope will not start even if it is powered
by the battery charger. First, charge the battery completely and then supply the
oscilloscope with power through the battery charger. However, do not switch on the
oscilloscope’s power for fifteen minutes. If the oscilloscope still will not start, please
contact Extech Instruments.
The battery may need recharging. Check the battery symbol at the upper right of the
screen. The
charged.
Make sure the instrument is switched to the measuring mode. Depress any of the
three keys V, A or R. The relative measuring mode will then be shown on the screen.
If ERR is still displayed, restart the meter.
Check whether the channel attenuation factor matches the actual probe ratio.
Check whether the trigger mode in the trigger mode menu is in the Normal or the
Single-Shot mode and whether the trigger level is out of the Waveform range. In
such a condition, adjust the middle trigger level or select the non-auto trigger mode.
Additionally, press the AUTO SET key.
This is normal.
indicated.
waveforms and the video trigger mode is applicable to video signals. Only when
the proper trigger mode is applied can the Waveform stabilize.
the HF or LF noise.
Check whether the setting in the trigger mode menu matches the signal channel
Check the trigger mode: The edge trigger mode is applicable to normal
Change the trigger coupling to HF repression and LF repression in order to filter
symbol indicates that the battery has run out of power and must be
46
MS400 Version 2.0 – December 2007