AMETEK Compact IX 2253 - Manual (Page 66)

User Manual 2253i / 2253iX
AMETEK California Instruments 66
ENTRY DESCRIPTION
CREST FACTOR This readout displays the ratio between peak current and rms
current.
MEASUREMENTS 3 (iX Models only)
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 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.
PEAK CURRENT This value is the instantaneous peak current. See also PEAK CURR
in MEASUREMENTS 2 screen.
VOLT THD 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:MODE FUND” command. At power up or after a reset
command, the mode will revert back to RMS.
PHASE Relative voltage phase angle measurement with respect to phase A.
This readout is only relevant if an external clock source is used.
Update Program Functions from Measurement Screen
The Shuttle knob can be used to update voltage and/or frequency settings while the measurement
readout screen is displayed. To do so, select the desired parameter to be change while in the SET
screen using the left arrow cursor. Then, select the measurement screen by pressing the MEAS
button. While the measurement screen is visible, the shuttle continues to operate.