Xantrex XKW 12-150, Operating Manual

Page: 84 / 90

Calibration
Calibrating for Programming Accuracy
82
Operating Manual for XKW 3kW Series Power Supply
Calibrating for Programming Accuracy
The offset and range of the voltage and current programming circuits are calibrated
for default 0-5Vdc programming signals at the factory. Recalibration may be
necessary when you use custom 0-10Vdc programming or when you switch back to
0-5Vdc programming after previously calibrating for 0-10Vdc programming.
Voltage
Programming
Circuit
Calibration
Table 4.1
Voltage Programming Calibration Procedures
Repeat this procedure until the voltage programming is adjusted to the desired
accuracy.
Function & designation
of multiturn trim pots
Step Action
1 Disconnect any load. Connect a DVM rated at better than 0.5%
accuracy to the power supply output.
Voltage Program Offset
(R93)
2 Apply 1% of program voltage. Example: 0.1 for 0-10Vdc or 0.05 for
0-5Vdc programming source
3 Adjust R93 until the DVM reads 1% of the rated output voltage.
Example: 0.4Vdc for 40V Model
1 Disconnect any load. Connect a DVM rated at better than 0.5%
accuracy to the power supply output.
Voltage Program Scale
(R60)
2 Apply 100% of program voltage. Example: 10V for 0-10Vdc or 5V for
0-5Vdc programming source
3 Adjust R60 until the DVM reads 100% of the rated output voltage.
Example: 40Vdc for 40V Model
TM-25OP-01XN.book Page 82 Monday, April 5, 2004 8:58 AM