Trend
The figures in the table are instantaneous values that update constantly. While
changes in these values over time are recorded in the Trend. The traces build up
from the right side. The readings in the header correspond to the most recent
measurements plotted on the right.
Available function keys:
F1
Switch parameter being displayed.
F4
Return to the Table screen.
F5
Switch between RUN and HOLD.
Tips and Hints
Power mode can be used to record apparent power of a transformer over several
hours. Look at the Trend and find out if the transformer is overloaded.
Interpretation of Power Factor when measured at a device:
PF = 0~1: not all supplied power is consumed by the device, a certain
amount of reactive power is present. Current leads (capacitive load) or
lags(inductive load).
PF = 1:
all supplied power is consumed by the device. Voltage and current
are in phase.
PF = -1:
device generates power. Current leads or lags.
Reactive power (VAR)is most often due to inductive loads such as asynchronous
motor, induction furnace, and transformers, etc. Installation of correction capacitors
can correct for inductive VAR's.
7.7. Flicker
Flicker quantifies the luminance fluctuation of lamps caused by supply voltage
variations. The Analyzer design strictly meets the IEC61000-4-15 Flicker Meter
model. The Analyzer converts duration and magnitude of voltage variations into an
-75-