Instructions

10 GMC-I Messtechnik GmbH
4.2 Measuring Loop Impedance (Z L - PE )
Attention!
!
Single-Phase Mains Connection
The phase must be connected to L1
for single-phase mains connection.
4.2.1 Measuring Loop Resistance with the
PROFITEST MTECH+ or MXTRA
Preparing for Measurement
➭ Connect the test instrument’s test plug
to the PRO-SCHUKO plug insert.
➭ Disconnect the system from all sources
of voltage before connecting the mea-
suring points to the test adapter.
➭ Connect the system to sockets L1, L2,
L3, N and PE.
➭ Switch the system on.
Performing the Measurement
Attention!
!
Insulation test voltage may not ex-
ceed 500 V.
➭ Perform the measurement as described
in the operating instructions for the re-
spective test instrument:
PROFITEST MTECH+: sections 5.8 and 8
PROFITEST MXTRA: sections 5.8 and 8
Overview of Connected Conductors
The red illuminated LEDs in the connections
overview indicate the respectively connected
conductors.
Continuity, Z L - PE
4.2.2 Measuring Loop Impedance with the
PROFITEST PRIME
Preparing for Measurement
➭ Using the corresponding test probes,
connect the test instrument to the L, N
and PE sockets at the test adapter.
➭ Disconnect the system from all sources
of voltage before connecting the mea-
suring points to the test adapter.
➭ Connect the system to sockets L1, L2,
L3, N and PE.
➭ Switch the system on.
Performing the Measurement
Attention!
!
Insulation test voltage may not ex-
ceed 500 V.
➭ Perform the measurement as described
in the operating instructions for the test
instrument:
PROFITEST PRIME: sections 8.6 and 13
➭ Loop impedance is measured using the
Z
LOOP AC/DC measurement variant.
Note!
Measurement with the following mea-
surement variants is not possible with
the PROFITEST PRIME:
– Z
LOOP DC+
– Z
LOOP
– ZLOOP
Test
Sequence
Z
L-PE
LED Display (red)
01/3 L1-PE LED1 + LED11
02/3 L2-PE LED2 + LED11
03/3 L3-PE LED3 + LED11
PROFITESTREMOTE Measurements