Measurements; Dc Voltage Measurements - Extech Instruments GX900 User Manual

MEASUREMENTS
WARNING: Risk of electrocution. High‐voltage circuits, both AC and DC, are very dangerous and should be
measured with great care.
1. ALWAYS turn the function switch to the OFF position when the meter is not in use.
2. If OL appears in the display during a measurement, the value exceeds the selected
range. Change to a higher range or use the Auto range mode.
DC VOLTAGE MEASUREMENTS
CAUTION: Do not measure DC 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 V‐ position.
2. Insert the black test lead banana plug into the negative
COM jack. Insert the red test lead banana plug into the
positive V jack.
3. Touch the black test probe tip to the negative side of the
circuit.
4. Touch the red test probe tip to the positive side of the
circuit.
5. Read the voltage in the display.
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Extech Instruments
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