GOSSEN-METRAWATT
11
4.4
Connecting the Device Under Test to the Test Instrument
The DUT must be connected to the test socket (8), or to the jacks or terminals (9 and 10)
which are connected in parallel to the test socket for the measurement of protective conduc-
tor resistance, insulation resistance and equivalent leakage current. Terminal (9) is connected
to the short-circuited phase conductor jacks at the test socket (8), and terminal (10) is
connected to the earthing contact at the test socket (8). Use one of the following test setups,
depending upon the type of device under test.
4.4.1 Safety Class I DUT with Mains Plug
4.4.2 Safety Class II DUT
4.4.3 DUT Without Mains Plug or Safety Class III DUT
4.4.4 3-Phase DUT
To test socket
Switch the DUT on!
To housing for measurement of protective conductor resistance
Test cable, e.g. KS13
Switch the DUT on!
To test socket
To exposed metal
parts
N
L1
PE
KS13
Switch the DUT on!
To housing for measurement of protective conductor resistance
SCI II
N
L1
L2
PE
L3
Switch the DUT on!
To housing for measurement of protective conductor resistance