Keithley 2260B-30-36, Руководство по настройке, Страница: 12 / 55

Section 3: Constant voltage verification Series 2260B Programmable Power Supplies Verification and Adjustment Manual
3-2 077104802 / November 2016
Before proceeding, make sure that the 2260B instrument is off.
To perform voltage programming and measurement accuracy:
1. Connect the AC power supply to the 2260B.
2. Connect the DMM on the PCS-1000 directly across the +S and -S terminals to an electronic DC
load, as shown in the previous figure.
3. Turn on the 2260B and, if necessary, all of the other instruments.
4. Press the Set button on your 2260B and program the output voltage to 0.1 and the output current
to its maximum value with the load off (see Series 2260B available models (on page 1-1)).
5. On the 2260B press the Output button. Note that CV is displayed on the 2260B front panel and
the output current reading on the PCS-1000 should be approximately zero.
6. Record the DMM output voltage reading and the voltage indicated on the 2260B. The readings
should be within the limits specified in the test record form for the appropriate model (see
Verification test record forms (on page 5-1) for the appropriate model, under Voltage
Programming and Measurement).
7. Program the output voltage to its maximum rated value (see Series 2260B available models (on
page 1-1)).
8. Record the DMM output voltage reading and the voltage indicated on the 2260B.
The readings should be within the limits specified in the test record form for the appropriate model
(see
Verification test record forms (on page 5-1) for the appropriate model, under Voltage
Programming and Measurement).
Verifying voltage programming and measurement accuracy is complete.
Constant voltage load regulation verification
This test measures the change in output voltage resulting from a change from full load to no load.
Hazardous voltages may be present on all output and guard terminals. To prevent electrical
shock that could cause injury or death, never make or break connections to any of the
instruments used for this verification test while instruments are powered on. Turn off the
2260B instrument from the front panel or disconnect the main power cord from the rear of
the instrument before handling cables. Putting the equipment into an output-off state does
not guarantee that the outputs are powered off if a hardware or software fault occurs.
Precautions must be taken to prevent a shock hazard by surrounding the test device and
any unprotected leads (wiring) with double insulation for up to 800 volts depending on the
power supply that you have, Category I.
Figure 2: 2260B Constant voltage load regulation