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5320A
Users Manual
Fluke 1653
Calibrating Earth Resistance Testers
Earth Resistance calibration is performed 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 Calibrator 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. Using Figure 7-2 for a reference, connect the UUT to the Calibrator's LO
2. Press L.
3. If Open or Short is displayed, press the Mode softkey. Then, using the cursor keys
4. In the Output display, verify 4-Wire is displayed. If not, use the instructions in
5. If needed, select the Earth Resistance function on the UUT.
6. Press O.
7-4
PE
(L2/Green)
L (L1/Red)
Figure 7-1. Resistance Calibration UUT Connections
LO terminals as well as the LO
or rotary knob, highlight Resistance 4-wire and select it by pressing the Select
softkey or pushing in on the rotary knob.
Chapter 4 to change to 4-wire resistance.
The resistance is applied to the output terminals. Compare the reading on the UUT
with the standard value on the Calibrator's display.
Sense HI terminal.
Fluke 5320A
5320A MULTIFUNCTION ELECTRICAL TESTER CALIBR
OUTPUT
V
, HI
, mA
LO
LO
- SENSE
HI
HI
50V PK
1500V PK
MAX
MAX
LO
LO
20V PK
20V PK
Z
, Z
GND ,
RCD
L
L
PE
N
L1
H
L2
E
L3
S
280V
280V
RMS
RMS
MAX
MAX
20V PK
METER
INPUT
METER
A
COM
V
CAT I
30A
1000V
RMS
CAT II
20V PK
600V
MAX
RMS MAX
ehq030.eps
HI and
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