Turn-On Checkout
33
Some power supplies have a high output current capacity. To prevent overheating or possible melting of
the shorting wire, make sure it is of sufficient size to carry the supply's maximum output current (see
Table 4-2 in Chapter 4 for the appropriate wire size).
Perform the steps in Table 3-2 to check the basic current functions with a short across the power supply output. The AMPS
display will show various readings. Ignore the VOLTS display.
Table 3-1. Checking the Voltage Functions (Output Terminals Open)
If the Dis annunciator is on, turn it off by pressing
Press VOLT 0.000
Displays default output voltage. CV annunciator is on. If CC
annunciator remains on, increase the CC current setting by
pressing
Press V0LT 20 *Set voltage to supply's rated output.
Press 20.000 Meter mode displays output voltage.
Press several times **Voltage drops about 5 millivolts each time you press the key.
Press the same number of
times
**Voltage increases about 5 millivolts each time you press the
key.
Rotate the Voltage control first
counterclockwise and then clockwise
Control operates similarly to the and keys.
Turning the controls more quickly causes a more rapid change
in voltage.
Press 0V 22.000 ***Shows the default OVP trip voltage.
Press 0V 15 Program OV trip voltage to 15.
Press You have entered a trip voltage that is less than the output
voltage. The output drops to near zero. The CV annunciator
goes off and the Prot annunciator comes on.
Press
0V Indicates the overvoltage Protection circuit has tripped.
Press Meter mode
Press 0V 21 Raise the OV trip voltage up above the programmed output
voltage.
Press
Enter the new trip voltage.
Press **** 20.000
You have cleared the OV protection fault. The Prot
annunciator goes off, the CV annunciator comes on, and the full
rated output is restored.
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