Probe Compensation; Automatic Setup For Waveform Display - Tenma 72-8710 Operating 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. Set the probe attenuation factor to 10X. Move the switch on the
probe to 10X and connect the probe to CH1. When using a hook-
tip, ensure it is well connected to the probe. Connect the probe tip
to the output terminal of the probe compensator's signal
connector, and the ground clamp to the ground cable connector of
the probe compensator. Activate CH1 then press [AUTO].
2. Observe the displayed waveform.
Overcompensation Correct Compensation Undercompensation
Figure 1-8 Probe compensation calibration
18
If you see an "Undercompensation" or "Overcompensation"
3.
waveform display, adjust the adjustable capacitance tab of the
probe with a screwdriver with non-metal handle, until a "Correct
Compensation" waveform shown in the above figure 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 Setup for Waveform Display

Your DSO oscilloscope features an auto setup 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 auto setup function can only
be operated when the signal to be measured is 20Hz or above and
the duty ratio is larger than 1%.
Using the Auto Setup 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.
DSO Series User Ma nual