Table 5-2: External Signal Input Connector Pins - Ametek CSW5550 User Manual

User Manual
5.3.3 Output Phase Calibration
1. Program the AC mode, 60 Hz, 120 volts and each Phase to the Square Wave.
2. Measure the output phase angle of phase B and C relative to phase A.
3. If the phase B and C outputs are not within  1 degree of the programmed phase angle, calibrate
the PHASE OFST value in the OUTPUT CAL screen.
5.3.4 External Signal Input Calibration
The External Signal Input is applied to the 16-pin, D-Sub connector, J32 on the rear panel of the power
source. A 0 to 5 volt signal, AC or DC, will generate a zero to full-scale output voltage, 156 or 312 volts.
Refer to Table 6-2 for the connector pin connections. The A, B and C inputs will be tied together for the
same input signal.
1.
Connect the external AC signal to the A, B and C inputs. Use pin 10 for the common
connection.
2.
Program the ALC OFF and the High Voltage range. Do not close the output relays.
3.
Press the MENU key to select UTILITY then VOLT/CURR CONTROL. Program VOLT REF to
EXT.
4.
Again press the MENU key to select EXTERNAL CALIBRATION. This screen will show four
values to be calibrated:
a) The ZERO DC must have the value 0 entered with the output relays open. This value must
be entered even though it already shows the zero value. Perform this operation for all three
phases. This calibration must also be repeated for the RPV mode of operation. (this may
change in the future since the result is the same)
b) FS OUT is the nominal output calibration value. This value must be between 0 and 4095.
Start with a value of 1000. Close the output relays with the ALC OFF. Apply and External
Input signal of 5.000 ± 0.005 volts. If necessary adjust the FS OUT value for an output of
62.4 times the exact value of the input signal. Repeat this calibration for all three phases.
This procedure must also be repeated for the RPV mode but the exact same value may be
programmed for the respective phase.
c) ZERO RMS This parameter is not used for the CSW.
d) FS ADC is the Full-scale calibration value. Turn OFF the ALC. Apply an External Input
signal of 5.000 ± 0.005 volts. Select the phase for calibration. Enter the value of 312.0 or
62.5 times the External Signal input if it isn't exactly 5.000 volts. Repeat for all phases.
External Signal Input Function
Phase A
Phase B
Phase C
CSW Series
J32 Connector Pin (Use pin 10 for the DMM common)

Table 5-2: External Signal Input Connector Pins

California Instruments
1
9
2
113