Check Dc Current Load Regulation - Keithley 2200 series Reference Manual

Appendix B: Calibration

Check DC current load regulation

This check procedure uses the same test setup as the previous procedure (see
line regulation
1. 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.
2. Set the electronic load as follows:
a. Set to Constant Voltage.
b. Set to the minimum test voltage level.
Instrument
2200 - 20 - 5
2200 - 30 - 5
2200 - 32 - 3
2200 - 60 - 2
2200 - 72 - 1
2.
3. Set the DUT to 100% of the FS output current for your product.
4. Set the DUT to 100% of the FS output voltage for your product.
5. Turn the DUT output on.
6. Enter the voltmeter reading into the DC current load regulation table for checking current load
regulation at the minimum voltage for your product.
7. Increase the electronic load to the Reference test voltage level.
Instrument
2200 - 20 - 5
2200 - 30 - 5
2200 - 32 - 3
2200 - 60 - 2
2200 - 72 - 1
7. Enter the voltmeter reading into the DC current load regulation table for checking current load
regulation at the reference test voltage for your product.
8. Increase the electronic load to the Maximum test voltage level.
B-30
(on page B-28)).
Minimum test voltage
2.0 V
3.0 V
3.2 V
6.0 V
7.2 V
Minimum test voltage
10.0 V
15.0 V
16.0 V
30.0 V
36.0 V
Series 2200 Programmable DC Power Supplies Reference Manual
Check DC current
2200S-901-01 Rev. C / March 2016