Functional Chec
k
4. Use the probe BANDWIDTH LIMIT or RANGE buttons to set the probe offset voltage to 0 V, as displayed on the
oscilloscope.
The BANDWIDTH LIMIT button decreases the offset voltage and the RANGE button increases it.
5. Press the AUDI
BLE O VERRA NG E button on the probe to store the value. The OVERRANGE LED on the probe
stops fl ashing to confirm that the value has been stored.
6. Repeat steps 3 through 5 for the other range setting on the probe.
If you cannot null the offset with these steps, then use the DC Offset Zero Reset procedure that follows.
DC Offset Zero Reset
To reset the probe DC offset to the default values, do the following:
1. Connect the probe inputs together with the hook tips.
2. Press and hold the probe BANDWIDTH LIMIT and RANGE buttons until the OVERRANGE LED on the probe begins
flashing.
3. When the OVERRANGE LED remains lit (after about 4 seconds), release the buttons.
4. Press the AUDIBLE O VERRA NG E button on the probe to store the value. The OVERRANGE LED on the probe turns off
to con firm that the default value for the DC offset has been stored.
5. Repeat steps 2 through 4 for the other range setting on the probe.
6. Perform the DC Offset Zero procedure a s described in the previous section.
21 THDP0100/0200 & TMDP0200 High Voltage Differential Probes Instruction M anual
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