Xantrex XKW 12-150, Operating Manual

Page: 85 / 90

Calibration
Calibrating for Programming Accuracy
Revision A
83
Current
Programming
Circuit
Calibration
Table 4.2
Current Programming Calibration Procedures
Repeat this procedure until the current programming is adjusted to the desired
accuracy.
Notes:
1. The DC shunt-DVM combination must be rated better than 0.5% accuracy. The
recommended current ratings for the DC shunt and connecting wire must be at
least 10% greater than the power supply's output current rating.
2. The required DVM reading is calculated using V=I x R where V is the DVM
reading, I is the current, and R is the DC shunt resistance.
Function & designation
of multiturn trim pots Step Action
1 Connect a shunt and DVM to the power supply output. See Note 1.
Current Program Offset
(R95)
2 Apply 1% of program voltage. Example: 0.1 for 0-10Vdc or 0.05 for
0-5Vdc programming source
3 Adjust R95 until the DVM indicates 1% of the rated output current.
Example: 0.75A for 40V Model. See Note 2.
1 Connect a shunt and DVM to the power supply output. See Note 1.
Current Program Scale
(R66)
2 Apply 100% of program voltage. Example: 10V for 0-10Vdc or
5V for 0-5Vdc programming source
3 Adjust R66 until the DVM indicates 100% of the rated output current.
Example: 75A for 40V Model. See Note 2.
TM-25OP-01XN.book Page 83 Monday, April 5, 2004 8:58 AM