Programmable Power Supplies Verification and Adjustment Manual Section 4:
Constant current verification
077104802 / November 2016 4-5
Before proceeding, make sure that the 2260B instrument is off.
To perform CC line regulation verification:
1. Connect the AC power supply.
2. Connect the PCS-1000 current input across the +S and -S terminals through an electronic DC
load, as shown in the previous figure.
3. Turn on the 2260B and, if necessary, all of the other instruments.
4. Set the variable AC voltage to nominal line voltage.
5. On your 2260B press the Set button and program the output current to its maximum rated value
(see Series 2260B available models (on page 1-1
), if needed).
6. Press the Output button on your 2260B.
7. With the electronic load in CR mode short the load and program the 2260B output voltage to 15
volts. Note that CC is displayed on the 2260B front panel. If CC is not displayed, adjust the load
so that the voltage drops and CC is displayed.
8. Adjust the AC power source to the low-line voltage (85 VAC for 100/120 nominal line; 170 VAC
for 200/240 nominal line).
9. Record the PCS-1000 input current reading.
10. Adjust the AC power source to the high-line voltage (132 VAC for 100/120 nominal line; 265 VAC
for 200/240 nominal line).
11. Record the PCS-1000 input current reading.
The difference between the PCS-1000 reading in steps 9 and 11 is the source effect, which should
not exceed the value listed in the test record form (see Verification test record forms (on page 5-1
) for
the appropriate model, under CV line regulation, if needed).
Verifying CC line regulation is complete.
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