Cal Power TrueWave TW5250 Service Manual page 56

CALIBRATION
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 = 240.0 / MEAS1
VALUE2 = 240.0 / MEAS2
VALUE3 = 240.0 / MEAS3
VALUE4 = 240.0 / MEAS4
VALUE5 = 240.0 / MEAS5
Update the remote high range frequency calibration of the TW by sending the following
GPIB string:
CAL{1,2,3}:OUTP:REM:HIR:VOLT:FREQCAL VALUE1 VALUE2 VALUE 3VALUE4 VALUE5
Close the TW's output relay:
OUTPUT ON
Wait for the DMM reading to settle and record the value as RDNG1.
Query the TW's output put voltage with the GPIB string below and record this value as
MEAS1.
MEAS{1,2,3}:VOLT?
3-20
TW SERIES