MI 2142 AlphaPAT Measurements
21
6 Measurements
6.1 Earth bond resistance
This test ensures that the connections between the protective conductor terminal in the
mains plug of the appliance and each conductive part of the appliance housing are
satisfactory and of sufficiently low resistance.
A high current is normally used to stress the connections under fault conditions. 100mA
test current is used to prevent damage that may be caused by testing when using high
currents. This is often necessary when sensitive electronics such as computers and
other information technology equipment is tested.
For class I appliances, a resistance is measured between the protective conductor of
the test socket and
test probe connection at the conductive parts of the appliance.
APPLIANCE
UNDER
TEST
Measurement of earth bond resistance of class I appliance
6.1.1 How to perform single earth bond resistance measurement
Select
Earth bond
in
Single test menu
by using and cursor keys and press
ENTER key to confirm.
Earth bond menu
is displayed.
Earth bond menu
Measurement parameters are detailed in the lower left corner of the display. The
following parameters can be adjusted:
test current,
high limit resistance value and
measurement duration.
