User Manual

Appendix B: Calibration Series 2200 Programmable DC Power Supplies Reference Manual
B-26 2200S-901-01 Rev. A/November 2011
2. Set the voltmeter as follows:
a. Set to measure DC volts.
b. Set to auto range.
c. Set to show amps (instead of volts) by multiplying the voltmeter result by 20.
 Press Shift DC V (mX+B)
 Use the arrow key to move the cursor as far to the right as it can go until it is positioned on the ^.
 Press the up range button once: M=10.00000
 Move the arrow key to the 1's digit and up range once: M=20.00000
 Press Enter. The display shows B=0
 Press Enter. The display shows Units:
 Use the arrow keys to modify the display to show AMP.
 Adjust each letter individually.
3. Set the electronic load as follows:
a. Set to Constant Voltage.
b. Set to the specified voltage for your DUT (see DC current accuracy (on page B-7)).
4. Set the DUT to 0% of the full scale (FS) output current.
5. Set the DUT to 100% of the FS output voltage.
6. Turn the DUT output on.
7. Enter the voltmeter reading into the table DC current accuracy (on page B-7).
8. Enter the voltmeter reading into the table DC current readback accuracy (on page B-8).
9. Enter the DUT current readout into the table DC current readback accuracy (on page B-8) under
the current readout column.
10. Calculate the difference of the two measurements taken in steps 8 and 9. Enter the absolute
value of the calculated value into the difference column of the table. DC current readback
accuracy (on page B-8).
11. Increase the DUT output current by 25% of the FS output current.
12. Repeat steps 7 through 11 until you complete testing at 100% of the FS output current.