Current Readback Calibration - Xantrex XKW 8-350 Operating Manual

Current
Readback
Calibration
Table 4.4 Current Readback Calibration
Function & Designation
of multiturn trim pots
Output Current Monitor
Offset (R23)
Output Current Monitor
Range (R24)
Repeat this procedure until the monitor scale is adjusted to the desired accuracy.
Notes:
1. The recommended accuracy of the DVM and DC shunt-DVM combination is
Calculate the required DVM reading using V=I x R where V is the DVM reading,
I is the current, and R is the DC shunt resistance.
Revision A
Step Action
1 Disconnect any load. Connect a shunt and DVM across the power
supply output to read the output current. Connect a second DVM to the
rear panel J3 output current monitor terminals. [J3-7 (Pos.) and J3-12
(Neg.)]. See Note 1.
2 Set the supply output current to 1% of its rated output current.
See Note 2.
3 Adjust R23 until the monitor DVM indicates 1% of the readback scale.
Example: 0.75A for 40V Model.
1 Set the supply output current to 100% of its rated value.
2 Adjust R24 until the monitor DVM indicates 100% of the readback
scale. Example: 75A for 40V Model.
four times better than your desired readback accuracy. The recommended
current ratings for the DC shunt and connecting wire is at least 10% greater than
the power supply's output current rating.
Calibrating for Programming Accuracy
Calibration
85