Amprobe GP-1 Earth-Tester-Ground-Probe - Manual (Page 9)

2-Point Ground/Earth
Continuity Test B
Page 9
NOTE: To measure ground rod resistance accurately, use test C & D instead of B!
It is necessary to familiarize yourself with the meter before doing the Two Point Measurement
Test B. Calibration is required for this test only.
1) Insert two of the desired test leads or cables into the instrument in C1 and C2 jacks.
2) Short the leads together.
3) Turn the GP-1 power ON.
4) Turn the GP-1 selector switch to Test B: GROUND/EARTH CONTINUITY.
5) Press SAVE button (“k” will be displayed).
6) Push and release the START button
The display will remain blank for approximately five seconds. The resistance of the test leads
will then be displayed for another five seconds and finally, the unit will null and display .00
Ω
.
The maximum, resistance of test leads that the GP-1 can nullify is five ohms. The instrument
will remain calibrated until the batteries are discharged or replaced.
7) Disconnect the short from the test leads and apply the test leads to the circuit under test.
8) Press the START button until a stabilized result is displayed, then release. The display
will go blank and then display the measurement of resistance in ohms (Rg). Note the
value of Rg or press the SAVE button.The value of Rg will be saved to the next available
memory location. Note the memory location.