Calibration and Troubleshooting
5-6 TM-F1OP-C1XN-01
Current Limit Programming Circuit Calibration
To perform current limit programming circuit calibration:
1. Ensure that the power supply is turned OFF. Disconnect any load.
2. Connect the program source between J2 connector terminals 8
(output current limit programming input) and 7 (current program
signal return).
3. Connect the shunt and DVM across the power supply output.
4. Turn the power supply ON.
5. Apply 1% of program voltage.
6. Adjust the current limit program offset (R469) until the shunt/DVM
indicates 1% of the model-rated output current. See Note.
7. Apply 100% of program voltage.
8. Adjust the current limit program range (R459) until the shunt/DVM
indicates the model-rated output current. See Note.
Repeat this procedure until output levels are adjusted to specifications
(see “Specifications”) or to the accuracy that your application requires.
Calibrating for Readback Accuracy
The factory calibrates the offset and range of the output voltage and
current monitor circuits to within 1% for the default 0-10 Vdc scales. You
may need to recalibrate when you select the 0-5 Vdc scale or when you
switch back to the 0-10 Vdc scale after previously calibrating for 0-5 Vdc
operation.
See “Calibration Setup” on page 5–2 for the procedures to remove the
cover and any option card. Follow all procedure steps in the sequence
given.
Important:
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.
TM-F1OP-C1XN-01.book Page 6 Thursday, October 25, 2007 9:04 PM
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