Ground Loop Measurements
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4 Ground Loop Measurements
n
Open the jaws and make sure the jaw mating surfaces are clean and free of
dust, dirt or any foreign substances.
o
Snap (open and close) the jaws a few times to ensure the jaws mate properly.
p
Turn the power on, and set the rotary switch to the
Ω
position.
Do not clamp on to any conductor or open the jaws at this moment
or during self-calibration.
q
At powering on, the clamp-on ground tester will self-calibrate for better accuracy.
Users should wait for the self-calibration to finish before making measurements.
During the self-calibration, the LCD will show CAL7, CAL6,..., CAL2, CAL1.
r
When the ground tester is ready, a beep sound will be heard.
s
Clamp on to the electrode or ground rod to be measured.
t
Read the value of Rg (ground loop resistance) from LCD.
Note: For better measurement:
Snap (open and close) the jaws a few times before powering on.
Do not clamp on to any conductor at the moment of powering on.
Note: If self-calibration does not stop:
This is because the self-calibration is not complete. The ground tester will con-
tinue the process until a proper self-calibration is complete.
Check the jaw mating surfaces. If there is any dirt, dust, or any foreign sub-
stance, clean the surface and power up again.
Note: Noise present in the electrode or ground rod:
If there exists over 3A current or 30V in ground rod, the symbol ”NOISE” will be
shown in LCD. Under the presence of noise, the reading is no longer accurate.
Note:
If the jaw assembly is open during measurement, a symbol and the word
”OPEN” will be displayed on LCD.
