Voltage Readback Calibration - Xantrex XKW 8-350 Operating Manual

Calibration
Calibrating for Programming Accuracy
Voltage
The factory calibrates the offset and range of the output voltage and current monitor
Readback circuits to within 1% for the default 0-5Vdc scales. Should you need to recalibrate,
make adjustments to multiturn potentiometers on the A2 Assembly PCB which you
Calibration
access by removing the cover of the power supply.
Table 4.3 Voltage Readback Calibration
Function & Designation
of multiturn trim pots
Output Voltage Monitor
Offset (R55)
Output Voltage Monitor
Range (R56)
Repeat this procedure until the monitor signal is adjusted to the desired accuracy.
Note:
1. The recommended accuracy rating for the DVMs is four times better than your
84
Step Action
1 Disconnect any load. Connect two DVMs; one to the power supply
output and the second to the voltage monitor terminals on the rear
panel J3 connector [J3-19 (Positive) and J3-6 (Negative)]. See Note.
2 Set the power supply output to 1% of its rated output voltage.
3 Adjust R55 until the monitor DVM reads 1% of the readback scale.
Example: 0.4Vdc for 40V Model.
1 Set the power supply output to 100% of its rated voltage.
2 Adjust R56 until the monitor DVM reads 100% of the readback scale.
Example: 40Vdc for 40V Model.
desired readback accuracy.
Operating Manual for XKW 3kW Series Power Supply