MD 9240 True RMS Power Clamp Meter
Operation
11
Note:
When measuring load circuits with power absorptions as in most applications,
positive W (Real Power) readings indicate correct measurement setups.
Negative readings (LCD annunciator “-“ turns on) indicate either the clamp-on
jaws direction or the test leads polarity is reversed in such cases. Correct the
setups
to get proper “A-lags” indications.
When encountering largely distorted waveforms, “A-lags” detection might be
affected due to the influence of harmonics. As mentioned, it is recommended to
deal with (e.g. filter out) harmonics before correcting phase-shift problems.
Measuring One or Single Phase Power Parameters:
