Local High Range Watts Frequency Calibration - Cal Power TrueWave TW5250 Service Manual

CALIBRATION
Query the TW's current using the GPIB string below, and record this value as MEAS4.
MEAS{1,2,3}:CURR?
Program the TW to 500 Hz using the string below:
SOUR{1,2,3}:FREQ 500
Wait until the power analyzer has stabilized and record the current reading as RDNG5.
Query the TW's current using the GPIB string below, and record this value as MEAS5.
MEAS{1,2,3}:CURR?
Program the TW to 60 Hz and open the output relay using the strings below:
SOUR{1,2,3}:FREQ 60
OUTP OFF
Calculate the calibration constants using the following equations:
VALUE1 = RDGN1/MEAS1
VALUE2 = RDGN2/MEAS2
VALUE3 = RDGN3/MEAS3
VALUE4 = RDGN4/MEAS4
VALUE5 = RDGN5/MEAS5
Update the TW's calibration data:
CAL{1,2,3}:MEAS:REM:HIR:CURR:FREQCAL VALUE1 VALUE2 VALUE3 VALUE4 VALUE5
CAL{1,2,3}:MEAS:LOC:HIR:CURR:FREQCAL VALUE1 VALUE2 VALUE3 VALUE4 VALUE5

3.29 LOCAL HIGH RANGE WATTS FREQUENCY CALIBRATION

Connect the 48 ohm resistor to the output of the TW through the power analyzer. Set
up the power analyzer to measure watts.
Set up the TW to AC coupling, high range, local sense, 40 Hz, 6.5 ampere current limit,
output relay closed and 240 volts with the following GPIB programming strings:
OUTP:COUP AC
SOUR:VOLT:RANGE HIGH
SOUR:SENSE LOCAL
SOUR:FREQ 40
SOUR{1,2,3}:CURR 6.5
OUTPUT ON
SOUR{1,2,3}:VOLT 240
3-40
TW SERIES