Xantrex XKW 12-150, Operating Manual

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Calibration
Calibrating for Programming Accuracy
84
Operating Manual for XKW 3kW Series Power Supply
Voltage
Readback
Calibration
The factory calibrates the offset and range of the output voltage and current monitor
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
access by removing the cover of the power supply.
Table 4.3
Voltage Readback Calibration
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
desired readback accuracy.
Function & Designation
of multiturn trim pots
Step Action
Output Voltage Monitor
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.
Offset (R55) 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.
Output Voltage Monitor 1 Set the power supply output to 100% of its rated voltage.
Range (R56) 2 Adjust R56 until the monitor DVM reads 100% of the readback scale.
Example: 40Vdc for 40V Model.
TM-25OP-01XN.book Page 84 Monday, April 5, 2004 8:58 AM