User Manual

Series 2200 Programmable DC Power Supplies Reference Manual Appendix B: Calibration
2200S-901-01 Rev. A/November 2011 B-21
Check DC voltage load regulation
This check procedure uses the same test setup as the previous procedure. (see Check DC voltage
accuracy without remote sense and voltage readback accuracy (on page B-17))
Ensure the warm-up criteria has been met as described in the Performance Verification Conditions.
1. Set the voltmeter as follows:
a. Set to measure DC volts.
b. Set to auto range.
Verify that the Math mX+b function is disabled (shift Dcv), assuring that volts are being read.
2. Set the electronic load as follows:
a. Set to Constant Current.
b. Set to draw 0 Amps.
3. Set the DUT to 100% of the full scale (FS) output current.
4. Set the DUT to 100% of the FS output voltage.
5. Turn the DUT output on.
6. Enter the voltmeter reading into the table DC voltage load regulation (on page B-6) under the Min
column for your product.
7. Increase the electronic load to the reference load test current value.
Instrument
Test current
2200- 20 - 5
2.5 A
2200 - 30 - 5
2.5 A
2200 - 32 - 3
1.5 A
2200 - 60 - 2
1.25 A
2200 - 72 - 1
0.6 A
8. Enter the voltmeter reading into the table DC voltage load regulation (on page B-6) under the
reference load column for your product.
9. Increase the electronic load to the maximum load test current value.
Instrument
Test current
2200- 20 - 5
4.9 A
2200 - 30 - 5
4.9 A
2200 - 32 - 3
2.94 A
2200 - 60 - 2
2.45 A
2200 - 72 - 1
1.17 A
10. Enter the voltmeter reading into table for checking DC Voltage Load Regulation under the Nom
column for your product. (see DC voltage load regulation (on page B-6).)
11. Calculate the three values: Ref – Min, Max – Ref, and (Max – Ref)/0.98. Enter the values into the
appropriate columns in the DC voltage load regulation (on page B-6) table.