Instructions

APPENDIX

245

Power measurement

Method

 Direct read method: Directly read the

measurement value measured from power

measuring instrument.

 The average power method: Record the actual

power value within a settable period of time

and then take the average. A settable period of

time isn’t less than 10min. The maximum

measurement interval is one second.

 Energy accumulation method: Measure the

energy within a settable period of time and

then divide it by the time to get the power. A

settable period of time isn’t less than 10min.

The cumulative energy must be greater than the

resolution by 200 times.

Measurement for small current

Voltage measurement mode measured from power supply side

(Connect to ammeter internally). The current measurement is

accurate. The voltage measurement on load could be larger than

the actual one due to partial pressure of multi-measurement

ammeter.

Connection

Power meter

Power supply

Product under test

Power loss = (Input current[A])

x 505mΩ