5322A
Operators Manual
166
Calibrate Earth Resistance Testers
Earth Resistance calibration is executed on earth resistance (also referred to as
ground resistance) testers and multifunction installation testers with earth
resistance testing capability. Most earth testers are 3-pole or 4-pole testers. To
calibrate these testers, the low ohms function of the Product must be set to
4-Wire mode. The example below shows how to setup calibration for a 3-pole
earth resistance tester.
To perform an Earth Resistance calibration:
1. Push .
2. Using Figure 31 for a reference, connect the DUT to the Product’s LOΩ HI
and LO terminals as well as the LOΩ Sense HI terminal.
3. Push the Mode softkey. Then, using the cursor keys or rotary knob, highlight
Resistance 4-wire and select it by pushing the Select softkey or pushing in
the rotary knob.
4. In the Output display, verify 4-Wire is displayed. If not, push the MODE
softkey, and follow the instructions in step 3 above to select Resistance
4-wire.
5. Adjust the output value to the desired resistance.
6. Push .
The resistance is applied to the output terminals. Compare the reading on the
DUT with the standard value on the Product display. The Product's low ohm
function has a feature to insert auxiliary resistors in series with the LO Ohms
HI terminals, to check the efficacy of the DUT's resistance measurement. See
Set the Low Resistance Source Output.
Fluke 5322A
Fluke 1653
PE
(L2/Green)
L
(L1/Red)
N
(L3/Blue)
iep031.eps
Figure 31. Earth Resistance Calibration Connections
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