MI 3321 MultiservicerXA
Single tests in PAT testing mode
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Notes:
During the test, a mains voltage is connected to the DUT. If DUT contains moving
parts, make sure that it is safely mounted or protected to prevent possible danger
to the operator or damage to the DUT or surrounding environment!
Consider any displayed warning before starting measurement!
6.3 Measurements
– Single tests for welding machines
Note:
For testing welding machines the 3-phase operation mode must be enabled and
the MultiservicerXA must be connected to a METREL 3-phase adapter (A1422).
6.3.1
Continuity of the protective circuit
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.
The instrument measures:
-
the resistance between mains test socket‘s PE terminal/ PE terminal (only if test
current of 200 mA is set) and S/C1 terminal.
-
the resistance between mains test socket‘s PE terminal on 3-phase adapter and
S/C1 terminal on MultiservicerXA.
Continuity menu
Test parameters for continuity measurement
OUTPUT
Test
current
[200 mA, 10 A]
LIMIT
Maximum resistance
[0.10
… 0.90
, 1.00
]
TIME
Measuring time
[5 s, 10 s, 30 s, 60 s, 120 s, 180 s]
Test circuit and measurement procedure for continuity measurement
For more information refer to chapter
Measurements according to IEC/ EN
60974-4
, paragraph
Continuity of the protective circuit
in 3-phase adapter
Instruction manual.
