11
Adjusting the Pass/Fail Point using the supplied Test Cordset
Use this adjustment procedure if the equipment under test uses a detachable power cord. Always use the
test cord supplied with the GF-30AC-T. Do not use the cordset of the EUT for this test.
1.
Connect your GF-30AC-T Tester to a correctly rated source of supply and turn the power switch to
the I or ON position.
2.
Plug the split end plug of the 10 AWG Test return lead into the Return Lead Receptacle of the
Tester. Connect the other end to the calibration resistor bolted to the rear panel.
3.
Plug the Test Power Cord into the Test Power Receptacle of the Tester. Attach the alligator
clip/wire assembly to the center lead at the end of the Test Power Cord and to the calibration
resistor.
4.
Adjust duration to minimum. See “Time duration adjustmen” on the next page.
5.
Insert the plastic calibration screwdriver into the potentiometer on the rear panel marked "CAL
POINT".
6.
Push and hold the Test Button. (Holding the test button will continue the test until the button is
released.)
7.
With the Test Button pressed, turn the screwdriver until both the red and green lights are on. The
internal buzzer may sound at the calibration point.
8.
Now, set the duration of the test. As shipped from the factory, the GF-30AC-T will only test while
the test button is pressed. By inserting the plastic calibration screwdriver into the potentiometer
marked "DURATION", the test time can be set. A time of approximately 5 seconds is
recommended, subject to approval by safety agency inspection personnel.
Adjusting the Pass/Fail Point for products with non-removable power cords
Use this adjustment procedure if the equipment under test uses a non-detachable power cord. (A non-
detachable power cord is permanently connected to the EUT with a strain relief bushing.)
NOTE
Ensure that the non-detachable power cord meets the length and conductor size requirements of Table 1-
2 before attempting to calibrate the tester. If a non-detachable power cord not meeting Table 1-2 is used,
the tester calibration procedure may not be successful. However, if the calibration procedure is
successful, the GF-30AC-T will test products correctly.
1. This procedure requires the use of a power cord assembly from the EUT. Obtain one from stock and
trim it to the total length used in the EUT, making sure to include the length of the cord inside the
enclosure of the EUT. Crimp or solder an alligator clip to the green or green with yellow stripes
(grounding) conductor of the cord at the open end.
2. Connect your GF-30AC-T Tester to a correctly rated source of supply and turn the power switch to
the I or ON position. The tester will perform a self-diagnostic test. Make sure the buzzer sounds and
the red light is illuminated during this test.
3. Plug the split end plug of the 10 AWG Test return lead into the Return Lead Receptacle of the
Tester. Connect the other end to the calibration resistor bolted to the rear panel.
4. Plug the EUT Power Cord prepared in Step 1 above into the Test Power Receptacle of the Tester.
Attach its alligator clip to the other lead of the calibration resistor.
5. Insert the plastic calibration screwdriver into the potentiometer on the rear panel marked "CAL
POINT".
Summary of Contents for GF-30AC-T
Page 1: ...GF 30AC T Ground Circuit Tester Instruction Manual...
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