Set The Ground Bond Resistance Output - Fluke Calibration 5322A Operator's Manual

Multifunction Electrical Tester Calibrator

Set the Ground Bond Resistance Output

Set the Ground Bond Resistance Output
For calibrating ground bond resistance functions in ground bond testers, HIPOT
testers and portable appliance testers, the Product presents selective resistance
values from 1 mΩ to 1.7 kΩ on its PE and N output terminals with sensing
available on the ZGND SENSE terminals. Each resistance output has strict
maximum current and voltage ratings. See the 5322A Specifications, Ground
Bond Resistance Source, for the maximum current and voltage ratings. There
are several operating modes for ground bond resistance calibration accessible
through the softkey labeled MODE. The resistance 2W mode outputs one of 16
resistors to the PE-N terminals in a 2-wire configuration. The 2W mode is
suitable for calibration of the ground bond resistance functions in DUTs which
only work in a 2-wire configuration. See Figure 5.
Examples of DUTs that only use two terminals are safety testers like Installation
testers, and PAT testers. The Product display in this 2W mode shows the
calibration value of the selected resistance between the PE and N terminals. 2-
wire connections for the ground bond resistance outputs are subject to internal
errors due to the relay contacts. See Clean the Ground Bond Resistance and
Loop/Line Impedance Relays to ensure optimal Product performance.
The resistance 4W mode outputs one of 17 resistors to the PE-N and PE-N
Sense terminals in a 4-wire configuration. This mode is suitable for calibration of
the ground resistance function of DUTs with 4-wire connections. Examples of
these DUTs are HIPOT testers with a ground bond function, earth resistance
meters, and dedicated one-function ground bond testers. The advantage of
resistance 4W is its inherent higher accuracy on Low-Resistance outputs. In
resistance 4W, the PE and N terminals are used as the current terminals, and the
Zgnd Sense terminals are used as the voltage terminals. The correct 4-wire
connection must be made from the DUT to the Product output terminals. Do not
swap the current and voltage terminals. See Calibrate Ground Bond Resistance
Function in HIPOT Testers and Figure 0-43 for an example of how to make 4-
wire connections to this type of workload.
Z , Z , RCD
L GND
R
PE N
iep012.eps
Figure 5. Simplified Ground Bond Resistance Source
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