AEMC 725 User Manual page 20

Warning
Though the meter can display to 1499 V in Auto Range and in the 600
V manual range, the warning triangle
Vrms. This indicates that the input exceeds the specified safety and
operating range. The displayed value is only indicative and not speci-
fied.
Do not continue to operate the instrument when the input value
exceeds the meter safety and operating specifications.
OL is displayed above 1499 V peak in the Peak mode and may also be
accompanied by the warning triangle if the RMS value exceeds 600 V.
The warning triangle
low (<50 mV) or if the fundamental is not 50 or 60 Hz.
Selecting AC and AC + DC Measurements
Voltage measurements may be displayed as AC only or as AC+DC, indicat-
ing that the measurement includes the DC component. Selection can be
made with (ON & SMOOTH) during initial ON. Please note that AC+DC
RMS value is not equal to the AC RMS reading plus the DC reading.
AC Voltage: Related Measurement Functions
In the voltage measurement mode, further power quality analysis for volt-
age is possible by pushing the following keys:
Activation will change operating mode and split screen for
HARM
simultaneous measurements of:
(AC or DC+AC)
• Bar graph display.
Select individual harmonics from Hdc, H01 to H25. The
instrument will display the True RMS amplitude of the
individual voltage harmonic as well as the percentage rela-
tive to the fundamental signal (%THD) or percentage rel-
ative to the RMS value (%DF), whichever is selected prior
to
18
may also be displayed if the input signal is too
!
Voltage →
or .
will be displayed above 600
!
%THD → %DF →
Clamp-On Harmonic Probe Model
Voltage
(AC or DC+AC)