Manual

11
Calibration
CALIBRATION
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Fine tuning of the input amplifi er circuit requires a 1.5V battery. This calibration is optional. You must only do this, if you want a higher
precision of your measurements.
To adjust the “Off set” trimmer RV2:
- Connect the (+) of the test lead with the (-).
- Press the Menu button.
- Use the down arrow button to scroll down to “Measure”.
- Use the right arrow button to select “Vdc”.
- Press the Menu button to return to the oscilloscope display.
- Now adjust the Offset trimmer RV2 until the displayed value is 0.00V.
To adjust the “Gain” trimmer RV1:
- Measure the output of the battery with a multimeter and memorise it.
- Connect the battery to the oscilloscope’s input.
- Adjust trimmer “Gain” RV1 until the displayed DC value corresponds with the measured value.
- Remove the battery.
If you had to adjust the Gain trimmer RV1 you have to check the off set trimmer RV2 setting again. Repeat these
steps until both settings are OK.