AEMC 3640 - Ground Resistance Measurement Procedure (3-Point)

28 Digital Ground Resistance Tester Model 3640 and 4610
4.5 Ground Resistance Measurement Procedure
(3-Point)
Ω
Press To
Measure
X-Z
Xv-Y
Xv-Y
ZYX
C1 P2 C2
Fault
Hi Resistance
Hi Noise
GROUND RESISTANCE TESTER
MODEL 3640
AUTORANGING
REFER TO USER MANUAL
FOR FAULT WARNING LIGHT
EXPLANATIONS
!
®
INSTRUMENTS
Alligator Clips
Ground Rod
Y Electrode
Z Electrode
Ground
Strip
Figure 15
WARNING: Use extreme caution when disconnecting the ground connection
from the rest of the circuit. Current may be flowing and a dangerous potential
could exist between the disconnected wires.
• XandXv(C1,P1)areshorted
• DisconnectshortinglinkbetweenYandZ(C2,P2)
• ConnectXtothegroundrodtobetested
• ConnectY(P2)tothecentralelectrode
• ConnectZ(C2)totheouterelectrode
• Depressthe“Measure”buttontomeasuregroundresistance