Uni-Trend UT4000 Series, User Manual

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UNI-T
®
UT4000 User Manual
Probe Compensation
When connecting the probe to any input channel for the first time, perform this
adjustment to match the probe to the channel. Skipping the compensation calibration step
will result in measurement error or fault. Please adjust probe compensation as follows :
1.
In the CH1 menu set the probe to 10X. Move the switch on the probe to 10X and
connect the probe to CH1. Connect the probe tip to the probe compensator’s signal
output connector, then connect the ground clamp to the ground wire connector of
the probe compensator. Display CH1 and press [AUTO].
2.
Observe the shape of the displayed waveform.
Overcompensation Correct Compensation Undercompensation
Figure 1-8 Probe compensation calibration
3. If you see an “Undercompensation” or “Overcompensation” waveform display,
adjust the adjustable tab inside the adjustment hole at the tip of the probe with the
adjusting rod in the probe accessory pack, until a “Correct Compensation”
waveform shown in Figure 1-8 is displayed.
Warning :
To avoid electric shock when measuring high voltage with the probe,
ensure the probe’s insulation lead is in good condition. Do not touch the metal part
of the probe when connected to HV power.
Automatic Setups for Waveform Display
Your UT4000 oscilloscope features an autoset function. It can automatically adjust the
vertical deflection factor, scanning time base and trigger mode based on the input signal,
until the most appropriate waveform is displayed. The autoset function can only be
operated when the signal to be measured is 50Hz or above and the duty ratio is larger than
1%.
Using the Autoset Function :
1. Connect the signal to be tested to the signal input channel.
2. Press [AUTO]. The oscilloscope will automatically set the vertical deflection factor,
scanning time base and trigger mode. Should you require to make more detailed
check, you can adjust manually after the autoset process until you get the optimal
waveform display.