Xantrex Technology XFR 2800 manual Output Current Monitor Circuit Calibration

Output

Current

Monitor

Circuit

Calibration

Calibration

Calibrating for Readback Accuracy

1.Ensure that the power supply is turned OFF. Disconnect any load.

2.Set SW1 switch 6 OPEN to select 0-5 V output current monitor range, CLOSED for 0-10 V.

3.Connect the shunt and DVM across the power supply output to read the output current. Connect a second DVM between the rear panel J2 connector terminals 12 (output current monitor) and 11 (current monitor signal return).

4.Turn the current control fully counter clockwise, then turn on the power supply.

5.Set the power supply’s output current to 1% of the model-rated output. See Note.

6.Adjust the output current monitor offset (R394) until the monitor DVM indicates 1% of the readback scale. (50 mVdc for 0-5 V readback or 100 mVdc for 0-10 Vdc readback.)

7.Set the power supply output current to the model-rated output.

8.Adjust the output current monitor range (R383) until the monitor DVM indicates 100% of the readback scale. (5 Vdc for 0-5 V readback or 10 Vdc for 0-10 Vdc readback.)

Repeat this procedure until the monitor signal is adjusted to power supply specifications (see Section 1) or to the accuracy that your application requires.

Note:Calculate the required DVM reading using V= IR where V is the DVM reading, I is the current, and R is the DC shunt resistance.

Release 2.1 85