Dc Local Low Range Calibration - Cal Power TrueWave TW5250 Service Manual

CALIBRATION
Wait for the TW to complete its coupling change to DC. Continue with the following
GPIB commands:
SOUR:VOLT:RANGE LOW
SOUR:SENSE LOCAL
SOUR{1,2,3}:CURR 5.00
SOUR{1,2,3}:VOLT:OFFSET 0.0
SOUR0:VOLT:PROT 200.0
CAL:UNIQ:DCDAC{A,B,C} 0
OUTPUT ON
Wait for the DMM to settle. Record the DMM reading as RDNG1.
Send the following GPIB command:
CAL:UNIQ:DCDAC{A,B,C} 255
Wait for the DMM to settle. Record the DMM reading as RDNG 2.
Calculate the required offset DAC setting.
VALUE1 = (256 * RDNG1) / (RDNG1 – RDNG2)
Set the dc offset calibration register:
OUTPUT OFF
CAL:UNIQ:DCDAC{A,B,C} VALUE1

3.7 DC LOCAL LOW RANGE CALIBRATION

Both the measurement and output subsystems are calibrated at the same time.
Connect the DMM to the output phase of the TW to be calibrated. Set the DMM for
auto–ranging volts DC. Send the following GPIB commands to the TW:
OUTPUT OFF
OUTP:COUP DC
Wait for the TW to complete its coupling change to DC. Continue with the following
GPIB command:
SOUR:VOLT:RANGE LOW
SOUR:SENSE LOCAL
SOUR{1,2,3}:CURR 5.00
OUTPUT ON
SOUR{1,2,3}:VOLT:OFFSET 0.0
Wait for the DMM to settle and record the value as RDGN1.
3-4
TW SERIES