Cal Power TrueWave TW5250 Service Manual page 53

SERVICE MANUAL
Close the TW's output relay:
OUTPUT ON
Wait for the DMM to settle and record the voltage as MEAS1.
Set the TW to 80 Hz.
SOUR:FREQ 80.0
Wait for the DMM to settle and record the voltage as MEAS2.
Set the TW to 160 Hz.
SOUR:FREQ 160.0
Wait for the DMM to settle and record the voltage as MEAS3.
Set the TW to 320 Hz.
SOUR:FREQ 320.0
Wait for the DMM to settle and record the voltage as MEAS4.
Set the TW to 500 Hz.
SOUR:FREQ 500.0
Wait for the DMM to settle and record the voltage as MEAS5.
Set the TW to 60 Hz and open the output relay.
SOUR:FREQ 80.0
OUTPUT OFF
Calculate the calibration constants:
VALUE1 = 120.0 / MEAS1
VALUE2 = 120.0 / MEAS2
VALUE3 = 120.0 / MEAS3
VALUE4 = 120.0 / MEAS4
VALUE5 = 120.0 / MEAS5
Update the remote low range frequency calibration of the TW by sending the following
GPIB string:
CAL{1,2,3}:OUTP:REM:LOR:VOLT:FREQCAL VALUE1 VALUE2 VALUE3 VALUE4 VALUE5
CALIBRATION
3-17