MI 3321 MultiservicerXA
Single tests in PAT testing mode
48
6.2 Measurements
– Single tests for appliances
6.2.1
Earth bond resistance
This test ensures that the connections between the protective conductor terminal in the
mains plug of the DUT and earthed accessible conductive parts of the DUT (metal
housing) are satisfactory and of sufficiently low resistance. This test has to be
performed on Class 1 (earthed) DUT.
The instrument m
easures the resistance between mains test socket‘s PE terminal/ PE
terminal (only if test current of 200 mA is set) and S/C1 terminal.
Earth bond menu
Test parameters for earth bond resistance measurement
OUTPUT
Test
current
[200 mA, 10 A]
LIMIT
Maximum resistance
[0.01
… 0.09
, 0.1
… 0.9
, 1
… 9
]
TIME
Measuring time
[5 s, 10 s, 30 s, 60 s, 120 s, 180 s]
Test circuit for earth bond resistance measurement
Measurement of earth bond resistance of class I DUT
Earth bond resistance measurement procedure
Select the
EARTH BOND
function.
Set test
parameters
.
Connect
device under test to the instrument.
Connect
test lead to S/C1 output on the instrument.
Connect
S/C1 lead to accessible metal parts of the device under test (see figure
above).
Press the
START
key for measurement.
