www.megger.com10Operation AVO® 215NOTE : Duty Cycle is a ratio of time that a circuit is energised compared to the time the circuit is de-energised. Typical circuit would be a heater element controlled by a thermostat.Duty cycle is measured in percentage of ON time. Example: A 75% duty cycle is a signal that is on 75% of the time and off 25% of the time.A complete ON / OFF cycle is generally called a period.4.3 DC Current measurements G Do not make 20 A current measurements for longer than 30 seconds.Exceeding 30 seconds may cause damage to the meter and /or test leads.1. Insert the black test lead plug into the negative COM socket.2. For current measurements up to 6000 μA DC, set the function switch to the μA position and insert the red test lead plug into the μA / mA socket. For current measurements up to 600 mA DC, set the function switch to the mA position and insert the red test lead plug into the μA / mA socket. For current measurements up to 20 A DC set the function switch to the 10 A position and insert the red test plug into the 10 A socket.3. Press the MODE button to indicate DC on the display.4. Remove power from the circuit under test, then open up the circuit at the point where the measurement is to be made.5. Apply the black test probe to the negative side of circuit.6. Apply the red test probe to the positive side of circuit.7. Apply power to circuit.8. Read the displayed current.
