California Instruments 2253i User Manual page 65

User Manual
ENTRY
CREST FACTOR
CURR THD
PEAK CURRENT
VOLT THD
P HASE
Update Program Functions from Measurement Screen
The Shuttle knob can be used to update vo
readout screen is displayed. To do so, select the desired parameter to be change while in the SET
sc en using the left arrow cu re
button. While the measurement screen is v
California Instruments
DESCRIPTION
This readout displays the ratio between peak current and rms
current.
MEASUREM NTS 3 (iX Models only)
This readout displays the total current distortion for the selected
phase. The distortion calculation is based on the H2 through H50
with the RMS current in the denominator. Note that some definitions
of THD use the fundamental component (H1) of the current as the
denominator.
If desired, the user can program the power source controller to use
the fundamental component as the denominator. This mode can
only be programmed over the bus by sending the
"MEAS:THD:MODE FUND" command. At power up or after a reset
command, the mode will revert back to RMS.
This value is the instantaneous peak current. See also PEAK CURR
in MEASUREMENTS 2 screen.
This readout displays the total voltage distortion for the selected
phase. The distortion calculation is based on the H2 through H50
with the RMS voltage in the denominator. Note that some definitions
of THD use the fundamental component (H1) of the voltage as the
denominator.
If desired, the user can program the power source controller to use
the fundamental component as the denominator. This mode can
only be programmed over the bus by sending the
"MEAS:THD:MO DE FUND" command. At power up or after a reset
command, the m ode will revert back to RMS.
R elative voltage phase angle measurement with respect to phas
This readout is only relevant if an external clock source is used.
ltage and/or frequency settings w
rsor. The n, s elect the measurement screen by pressing th
isible, the shut
E
hile the measurement
tle continues to operate.
2253i / 2253iX
e A.
e MEAS
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