SERVICE MANUAL
CALIBRATION
3-27
Set the TW frequency to 60 Hz and open the output via the GPIB:
SOUR:FREQ 60.0
OUTP OFF
Calculate the phase offset calibration data:
VALUE1
= -1.0 *
RDGN1
VALUE2
= -1.0 *
RDGN2
VALUE3
= -1.0 *
RDGN3
VALUE4
= -1.0 *
RDGN4
VALUE5
= -1.0 *
RDGN5
Update the calibration data via the GPIB:
CAL:UNIQ:OPHAC
VALUE1 VALUE2 VALUE3 VALUE4 VALUE5
Calculate the phase angle readback calibration data:
VALUE1
= -1.0 * (
RDGN1
+
MEAS1
)
VALUE2
= -1.0 * (
RDGN2
+
MEAS2
)
VALUE3
= -1.0 * (
RDGN3
+
MEAS3
)
VALUE4
= -1.0 * (
RDGN4
+
MEAS4
)
VALUE5
= -1.0 * (
RDGN5
+
MEAS5
)
Update the calibration data via the GPIB:
CAL:UNIQ:MOPHAC
VALUE1 VALUE2 VALUE3 VALUE4 VALUE5
3.18 EXTERNAL GAIN CONTROL CALIBRATION
Connect the DC power supply to the external analog in BNC of the TW. Connect the
DMM to phase A of the TW. Set the DC power supply to 2.000
±
0.005 volts. Setup
the DMM for AC volts.
Setup the TW with the following GPIB commands:
SOUR:VOLT:RANGE LOW
SOUR:SENSE REMOTE
SYST:EXT:GAIN 1
SOUR
{1,2,3}
:CURR 5.00
SOUR
{1,2,3}
:VOLT 100.0
OUTPUT ON
Wait for the DMM to settle and record the value as
RDNG1
.
Set the DC power supply to 8.000
±
0.005 volts.
Summary of Contents for TrueWave TW5250
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