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2. Plug the split end plug of the 10 AWG Test return lead into the Return Lead Receptacle of the
Tester.
3. Plug the Test Power Cord or non-detachable EUT power cord into the Test Power Receptacle of the
Tester, and then into the power inlet of the equipment to be tested.
4. Connect the alligator clip end of the Test Return Lead to the chassis of the equipment to be tested.
5. Push the test button. (If the GF-30AC-T duration control has been set according to the calibration
procedure, the test will automatically continue for the duration set in the calibration procedure. If the
duration control of the GF-30AC-T is set to zero, the test will continue only as long as the test button
is pressed.)
6. The result of the test will be shown by a combination of lights and a buzzer. Results are interpreted
below and in a truth table on the rear of the instrument.
Test results
Green Light: A green light indicates the ground system of the EUT has less than 100 milliohm
resistance. For most categories of equipment, this result is acceptable.
Red Light: A red light indicates the ground system of the EUT has more than 100 milliohm resistance.
If a red light occurs, the grounding circuit of the EUT should be reworked and then retested.
Red Light and Buzzer Sound: A red light and a buzzer sound indicates an open grounding circuit
condition. Check the test lead connections, correct, and retest. If the test lead connections are correct, a
red light and buzzer sound indicates an open grounding connection within the EUT. The grounding
circuit of the EUT should be reworked and then retested.
Simultaneous Red and Green Light: A simultaneous red and green light, with or without the buzzer
sound indicates the resistance of the ground circuit of the EUT is exactly at the pass/fail point.
Green Light and Buzzer Sound: If you obtain a green light and buzzer test result, the GF-30AC-T is not
generating full test current. The GF-30AC-T will report unreliable test results. Service is required.
Discontinue use of the tester immediately.
Summary of Contents for GF-30AC-T
Page 1: ...GF 30AC T Ground Circuit Tester Instruction Manual...
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