35
4. Enter in the " V Hi = " value to the power supply by the front panel keys and press "ENTER" once. For
example, if the full scale is 14.369 V as measured by the DMM, press:
1 4
•
3 6 9 ENTER
The voltage calibration is now complete!
CURRENT CALIBRATION:
1. When the voltage calibration is complete, connect the voltmeter to the Presicion Shunt Resistor as in
figure N.
2. The supply initially sends an offset current to the output. This offset current is measured on the DMM.
3. Enter the "I Lo = " value to the power supply by the front panel keys, and press "ENTER" once. For
example, if the DMM reads 103 mV, press:
1
•
0 3 ENTER
4. After calibrating the current offset value, the supply sends full scale current to the output. This value is
measured on the DMM.
5. Enter the "I Hi = " value to the power supply by the front panel keys, and press "ENTER" once. For
example, if the DMM reads .3301 V press:
3
•
3 0 1 ENTER
6. The current calibration is now complete!
<NOTES:>
For PPS-2322, Ch.1 and Ch.2 can only be calibrated in sequence (applies only in local
mode).
The PPS-1326 has two ranges and the voltage readback resolution for both ranges is
identical. However, the current ranges are not identical and therefore need to be calibrated
seperately. The low range is always calibrated first.
6.4 REMOTE CALIBRATION
The PPS Series are able to be calibrated via computer commands. Therefore, it is not necessary to remove the
power supply from the system. There are several commands available to calibrate. These are; CALCHNL, VOFF,
VFS, IOFF, IFS, IHIFS, ILOFS. A definition of these commands is presented in appendix A. The equipments
necessary for calibration are identical to the equipments used in local mode. Refer to figures M and N for voltage
and current calibration configurations.
The next section gives detailed programs on how to calibrate your power supply in the basic language.
6.5 CALIBRATION PROGRAM EXAMPLE
Please refer to Appendix D.
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