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User Manual – Rev AJ
California Instruments
PEAK CURR
This readout reflects the peak current value detected at the
t
POWER FACTOR
This readout shows the power factor of the load.
CREST FACTOR
This readout displays the ratio between peak current and rms
current.
[3Pi controller only]
lected
r. Note
t
on defi
the
v
nomin
readings between instruments depending on the
implementation chosen. The mode used by the power source is
selectable over the bus.
CURR THD
This readout displays the total current distortion for the selected
phase. The distortion calculation is based on the H2 through
H50 with the fundamental current (H1) in the denominator. Note
that other common definitions of THD use the RMS value of the
current as the denominator. This may result in different
readings between instruments depending on the
i
n chosen
e is
selectable over the bus
INST PK CURR
This readout reflects the instantaneous peak current value
detected at the output. This value is updated continuously and
does not require a reset operation like the PEAK CURR
readout. The instantaneous peak current does not use a track
and hold mechanism like the PEAK CURR measurement in the
M
2 scr
nt
on a cycle-by-cycle bas
cks
the rms current and the crest factor.
Update Program Functions from Measurement Screen
output. To measure inrush current for a unit under test, open
the output relay and reset the peak current value using the
PEAK CURR RESET entry. Then program the output voltage
and frequency and turn on the output relay. The peak curren
measurement will continuously track the maximum current
value detected until reset.
MEASUREMENT 3
VOLT THD
This readout displays the total voltage distortion for the se
phase. The distortion calculation is based on the H2 through
H50 with the fundamental voltage (H1) in the denominato
hat other comm
oltage as the de
nitions of THD use the RMS value of
ator. This may result in different
mplementatio
. The mode used by the power sourc
.
EASUREMENT
een. Instead, it tracks the peak curre
is. The INST PK CURR typically tra
The Shuttle can be used to update program parameters such as voltage, frequency or current
from the measurement screen. This can be achieved with the following sequence:
2. Use the up and down key to
will be changed by the shutt
3. Select the measurement 1 screen by pressing the MEAS key.
. The pointer symbol (
X
) poin
affected by turning the shutt
1. Select the program 1 screen using the PROG key.
select the desired function to update. (Selects parameter that
le once in the MEAS1 screen)
4
ts to the programmed parameter (V, F or CL) that will be
le.
88 MX
Series