Low Pass Filter For Acv Measurements; Dc/Ac Millivolt Measurements - Extech Instruments GX900 User Manual

LOW PASS FILTER FOR ACV MEASUREMENTS
The meter is equipped with a Low Pass Filter for AC
measurements. To activate the filter please follow the steps
below:
1. Set the rotary switch to the V~ position
2. Press the F1 key (MENU)
3. Move the menu selector to the LOW PASS field and then
press OK
4. Select LPF (Low Pass Filter) and then press OK
5. Press the F3 key (RANGE) and then press the F2 key (MANUAL)
6. Move the menu selector to the 500V field and press the OK key
DC/AC MILLIVOLT MEASUREMENTS
CAUTION: Do not measure DC/AC voltages if a motor on the circuit is being switched ON or OFF. Large
voltage surges may occur that can damage the meter.
1. Set the function switch to the mV position.
2. Press the F1 key (MENU), move the menu selector to the menu item labeled mVDC
or mVAC, and then press the OK key
3. Select mVDC or mVAC from the key options and press the OK key.
4. Insert the black test lead banana plug into the negative COM jack.
5. Insert the red test lead banana plug into the positive V jack.
6. Touch the black test probe tip to the negative side of the circuit.
7. Touch the red test probe tip to the positive side of the circuit.
8. Read the voltage in the display.
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Extech Instruments
GX900-EU-EN V1.6 4/14