Fluke 1630-2 User Manual page 17

2. Verify that the display reading is within specification, see
Table 4.
If the reading is not within specification, clean the
•
heads of the Jaw and repeat step 1 and step 2.
• If the reading is within specification, remove the Jaw
from the Standard Loop Resistance. The Clamp is
ready for a ground resistance measurement.
Table 4. Display Reading Specifications
Input (Ω) Minimum
0.474 0.417
0.5 0.443
10 9.55
100 96.0
For ground resistance measurements:
1.
2.
3.
4.
5.
Maximum
0.531
0.558
10.45
104.0
Open the jaw and make sure the jaw is free of dust, dirt, or
any foreign substances.
Turn on the Clamp.
Push  to select the Ω function.
Attach the Clamp to the electrode or ground rod to be
measured.
Read the value of R (ground resistance) from the
g
display. Figure 8 illustrates the ground resistance
measurement principles.
Earth Ground Clamp
How to Use the Clamp
13