www.megger.com9Operation AVO® 2154. Operation NOTE : Turn the function switch to OFF position when the meter is not in use.If ‘OL’ appears on display during a measurement, the value exceeds the range you have selected. Change to a higher range.4.1 DC Voltage measurements G Avoid measuring DC voltages if a motor on the circuit is being energised /de-energised. Large voltage surges may occur that can damage the meter.1. Set the function switch to VDC position.2. Insert the black test lead plug into the COM socket. Insert the red test lead plug into the V socket.3. Apply the black test probe to the negative side of circuit being tested. Apply the red test probe to the positive side of circuit being tested.4. Read the displayed voltage.5. If necessary, adjust range.4.2 AC Voltage (Frequency, Duty Cycle) measurements G Avoid measuring AC voltages if a motor on the circuit is being energised/de-energised. Large voltage surges may occur that can damage the meter.1. Set the function switch to VAC / Hz / % position.2. Insert the black test lead plug into the COM socket. Insert the red test lead plug into the V socket.3. Apply the black test probe to the Neutral side of circuit being tested. Apply the red test probe to the Live side of circuit being tested.4. Read the displayed voltage.5. If necessary, adjust range if required.6. For frequency measurements press the MODE button to indicate Hz on display. 7. Read the displayed frequency.8. For Duty Cycle press the MODE button to indicate % on display. Read the displayed % of duty cycle.
