Amprobe DGC-1000A Ground-Resistance-Tester User Manual
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V. OPERATION INSTRUCTION
5-1. Ground Resistance Measurement
1.
Open the jaws and make sure the jaws mating surfaces are clean
and free of dust, dirt or any foreign substance.
2. Snap the jaws closed a few times to let the jaws sit on the best
mating position.
3. Turn the power on, set the rotary switch at
position. Do not
clamp on to any conductor or open the jaws at this moment or
during self-calibration.
4. At power up, the clamp-on ground resistance tester will do the
self-calibration for better accuracy. Users should wait for
self-calibration to be complete. During the self-calibration, LCD
will show CAL5, CAL4, CAL 3, CAL2, and CAL1.
5. When the ground tester is ready, a beep sound will be heard.
6. Clamp on to the electrode or ground rod to be measured. Snap
the jaws closed a few times for better accuracy.
7. Read the value of R
g
(ground resistance) from LCD.
Note: For better measurement,
1. Snap the jaws closed a few times before powering on.
2. Do not clamp on to any conductor at the moment of power up.
3. Snap the jaws closed a few times after clamping on to ground
electrode.
Note: If self-calibration does not stop,
1. That is because the self-calibration is not complete. Ground tester
will continue the process until a proper self-calibration is done.
2. Check the jaw mating surfaces. If there is any dirt, dust, or foreign
substance, clean the surfaces.
3. Do not open the jaws during self-calibration.
Note: Noise present in the electrode or ground rod.
If overly excessive current or 30V in ground rod exists, the symbol
“NOISE” will be displayed on the LCD. In the presence of noise, the
reading is no longer accurate.
Note: If jaw is open during measurement, a symbol of OPEN will be
displayed in LCD.