19
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 pot 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
