Fluke Fluke 4325170 User Manual
Product codes
4325170
Earth/Ground Tester
Operation
19
Stakeless Ground Loop Measurement
With this test method, two clamps are placed around the earth ground rod or the
connecting cable and each are connected to the Tester. Earth ground stakes are not
used. A known voltage is induced by one clamp, and the current is measured with the
second clamp. The tester automatically determines the ground loop resistance at this
ground rod.
connecting cable and each are connected to the Tester. Earth ground stakes are not
used. A known voltage is induced by one clamp, and the current is measured with the
second clamp. The tester automatically determines the ground loop resistance at this
ground rod.
1. Select
. See Figure 8.
2. Connect current clamps.
Connect the inducing clamp (see Models and Accessories) to terminals H/C2 and
E/C1 with the supplied safety test leads (1.5 m) as shown.
E/C1 with the supplied safety test leads (1.5 m) as shown.
Note
Use the recommended current clamp for inducing only.
Other current clamps are not suited.
Other current clamps are not suited.
Connect the second current clamp using the adapter cable (sensing current
clamp).
clamp).
Clamp both current clamps around the earth electrode, which will subsequently be
measured.
measured.
Note
Minimum distance between the two current clamps is
10 cm.
10 cm.
3. Push
START.
indicates that measurement is in progress. For continuous
measurement, continue to push the START button.
4. indicates completed measurement. The result is kept on display until a new
measurement is started or the rotary switch is turned.