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Section 2. Installation
Functional Tests
Release A 29
Functional Tests
These functional test procedures include power-on and front panel function checks
as well as voltage and current mode operation checks.
Power-on
Check
1. Ensure that the front panel power switch is in the extended (OFF) position and
the voltage and current controls are in their fully counter-clockwise positions.
2. Ensure that the AC line voltage is within operating range.
3. Plug the line cord into a grounded AC outlet.
4. Push the power switch to turn on the power supply.
After a short power-on delay, the display and the red current mode LED lights. The
meter reading remains at zero.
For more about standard operations, see “Standard Operation” on page 35.
Voltage Mode
Operation
Check
1. Ensure that the front panel voltage and current control are turned fully
counter-clockwise.
2. Set the power switch to ON.
3. Rotate the current control one half-turn clockwise. Slowly rotate the voltage
control clockwise and observe the digital meter. Minimum control range should
be from zero to maximum rated output. Observe the bar graph meter to see that
it tracks as the voltage rises. Verify that the voltage mode indicator light is ON.
4. Set the power switch to OFF.
Current Mode
Operation
Check
1. Ensure that the front panel power switch is set to OFF.
2. Rotate the voltage and current controls fully counter-clockwise.
3. Rotate the voltage control one half-turn clockwise.
4. Connect a short circuit across the output terminals. Use leads of sufficient
current carrying capacity.
5. Set the power switch to ON.
6. Rotate the current control slowly clockwise. The control range should be from
zero to the maximum rated output
1
. Also check that the current bar graph meter
follows the rise in current and that the current mode indicator light is ON.
7. Set the power switch to OFF.
1. On 7.5-67 model, front panel current is limited to 30 A. Short the rear busbar terminals to test the
full current range is required.