CC load regulation
This test measures the change in output current resulting from a change in output voltage from full
scale to short circuit.
1.
Turn off the power supply using the AC line switch.
2.
Connect the power supply output with a DMM, an electronic load and a current shunt as shown
below.
3.
Turn on the power supply using the AC line switch.
4.
Program the output voltage and output current as described in the test record form under CC load
regulation.
5.
Enable the output by sending the command OUTP ON or by pressing the Output ON key.
6.
Operate the electronic load in constant voltage mode and set its voltage to the power supply output
value as described in the test record form under “CC Load Regulation”. See the Test Record Forms
under Test Description of “CC Load Regulation” for details. Check that the front panel CC annun-
ciator of the power supply remains lit. If it turns to CV or UNREG, adjust the load so that the output
current drops slightly until the CC annunciator lights up. Record the current reading (I
load
), by divid-
ing the voltage reading on the DMM by the resistance of the current monitoring resistor.
7.
Operate the electronic load in short (input short) mode. Record the current reading, (I
short
), by
dividing the voltage reading on the DMM by the resistance of the current monitoring resistor.
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