Ametek CSW5550 User Manual page 56

User Manual
POWER FACTOR
CREST FACTOR
VOLT THD
CURR THD
INST PK CURR
Update Program Functions from Measurement Screen
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:
1. Select the program 1 screen using the PROG key.
2. Use the up and down key to select the desired function to update. (Selects parameter that
will be changed by the shuttle once in the MEAS1 screen)
3. Select the measurement 1 screen by pressing the MEAS key.
The pointer symbol (  ) points to the programmed parameter (V,F or CL) that will be affected
by turning the shuttle.
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This readout shows the power factor of the load.
This readout displays the ratio between peak current and rms
current.
MEASUREMENT 3
This readout displays the total voltage distortion for the selected
phase. The distortion calculation is based on the H2 through
H50 with the fundamental voltage (H1) in the denominator.
Note that other common definitions of THD use the RMS value
of the voltage as the denominator. This may result in different
readings between instruments depending on the
implementation chosen. The mode used by the power source is
selectable over the bus.
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
implementation chosen. The mode used by the power source is
selectable over the bus.
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
MEASUREMENT 2 screen. Instead, it tracks the peak current
on a cycle by cycle basis. The INST PK CURR typically tracks
the rms current and the crest factor.
California Instruments
CSW Series