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Bench Check Procedures
1.
Wire the regulator as shown in Figure A below.
2.
Connect a 120 volt 50 to 150 watt light bulb as shown.
3.
Adjust the internal voltage and stability pots fully CCW (25 turns) or until a click is heard.
4.
Input 120vac into the regulator at #1 and #2. (Fuse this input with fuses rated at 120 volts or
higher and not more than 5 amps)
5.
Observation:
The green status light should be on and the incandescent light bulb should be off.
If the green status light is not on
, the internal fuses are blown in the regulator or there is
internal damage to the regulator!
If the green status light is not on, do not continue this test!
6.
SLOWLY turn the internal voltage adjustment CW until the incandescent light bulb turns fully on,
then adjust the internal voltage adjustment CCW until the light bulb is off.
7.
Observation:
You should be able to taper the incandescent light bulb on and off in a relatively
smooth manner.
If the light flashes on or off quickly, the regulator has an internal fault, do
not continue this test!
8.
Remove the 120vac from the regulator.
9.
Reconnect the regulator as shown in Figure B and perform all of the previous steps again.
In
this mode, the light bulb will only glow at half brightness!
10.
If you were able to successfully perform all of these tests, the regulator is good.
IF ANY
SINGLE STEP FAILED, THE REGULATOR IS DEFECTIVE!
Figure A
120V 50-150W
Incandescent
Figure B
120VAC
Fused
@ 5A
120V 50-150W
Incandescent
120VAC
Fused
@ 5A
