Trend
All values in the Table screen are recorded, but the Trends from each row in the table are displayed one
at a time. Press function key F1 to switch between parameters.
The traces build up from the right side. Readings in the header correspond to the most recent values
plotted on the right.
Available function keys:
F1
Switch parameters that the current Trend screen displays, the header shows content being
displayed.
F4
Return to the Table screen.
F5
Switch between RUN and HOLD.
Tips and Hints
Voltage and frequency should be close to the nominal values of for example 120V, 230V, 480V, 60Hz or
50Hz.
The voltages and currents in the table can be e.g. used to check if power applied to a 3-phase induction
motor is in balance. Voltage unbalance causes high unbalanced currents in stator windings resulting in
overheating and reduced motor life. Each of the phase voltages should not differ more than 1% from the
average of the three. Current unbalance should not exceed 10%. In case of too high unbalance, use
other measuring modes to further analyze the power system.
A Crest Factor close to 2.0 indicates high distortion. CF = 2.0 can e.g. be found if you measure the
current drawn by rectifiers that only conduct at the sine wave top.
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