AEMC 725 User Manual page 23

Selecting AC and DC + AC
Current measurements may be displayed as AC only or AC +DC, which indi-
cates that the measurement includes the DC component. Selection can be
made with (On & Smooth) during initial ON. Please note that the AC + DC
RMS value is not equal to the AC RMS reading plus the DC reading.
AC Current: Related Measurement Functions
In the current measurement mode further power quality analysis for cur-
rent is possible by pushing the following keys:
HARM Push button activation will change operating mode and
split screen for simultaneous measurements of:
• current,
• %THD or %DF
• bar graph display
Select individual harmonics from Hdc, H01 to H25. The
Model 725 will display the True RMS amplitude of the indi-
vidual current harmonic as well as the percentage relative to
the fundamental signal (%THD) or relative to the RMS value
(%DF) whichever is selected prior to
Hz Displays frequency measurements. In the HARM mode Hz
displays individual harmonic frequencies in the secondary
portion of the display.
RANGE Selects manual range of (0 - 60) or (0 - 600) amps.
In AC or DC+AC: A → Peak → Crest Factor → THDF → A.
Shift
In HARM mode: A → K Factor → A.
(yellow)
Push and hold (3 s) for battery life and voltage level check.
MIN/MAX Selects record function for MIN/MAX/AVG values.
SMOOTH Displays 3-second running average of measured value.
THDF Displays value for Transformer Harmonic Derating Factor
(yellow Shift push button 3 times).
Clamp-On Harmonic Probe Model
or .
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