High Range Current Calibration - Cal Power TrueWave TW5250 Service Manual

CALIBRATION
Calculate the calibration constants:
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:LOR:WATT:FREQCAL VALUE1 VALUE2 VALUE3 VALUE4 VALUE5

3.25 HIGH RANGE CURRENT CALIBRATION

Connect the 48 ohm resistor to the output of the TW through the power analyzer. Set
up the power analyzer to measure current.
Set up the TW to DC coupling, high range, local sense, 6.5 ampere current limit, output
relay closed and 24 volts with the following GPIB programming strings:
OUTP:COUP DC
SOUR:VOLT:RANGE HIGH
SOUR:SENSE LOCAL
SOUR{1,2,3}:CURR 6.5
OUTPUT ON
SOUR{1,2,3}:VOLT:OFFSET 24
Wait until the power analyzer has stabilized and record the current reading as RDNG1.
Query the TW's current using the GPIB string below, and record this value as MEAS1.
MEAS{1,2,3}:CURR?
Program the TW to 240 volts DC using the string below:
SOUR{1,2,3}:VOLT:OFFSET 240
Wait until the power analyzer has stabilized and record the current reading as RDNG2.
Query the TW's current using the GPIB string below, and record this value as MEAS2.
MEAS{1,2,3}:CURR?
Reset the TW back to AC coupling mode, output off.
SOUR{1,2,3}:VOLT:OFFSET 0.0
OUTP OFF
OUTP:COUP AC
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TW SERIES