RHEONIK Messgeräte GmbH
REV. I, Apr. 2004
.
Operation Manual RHE 07, 08, 11
Page
10
There are three types of Rheonik Special Cables
a)
Standard cable – for all devices.
temperature range -20°C .. + 70°C
b)
Steel-armed high performance cable – recommend for use in outside area and
for high distance over 25 m in combination with bigger sensors :
RHM 60, 80, 100 and 160.
c)
High temperature cable – for all devices.
temperature range -20°C .. + 205°C
Notes for the RHM xx Typ NT and ETx
In the case of NT and ETx sensors, the main cable shield and the single shields are only connected to
the electronics at terminal 3 and not connected to the sensor but rather shortened and insulated
there.
These measures prevent a current flow from passing through the cable shield between different earth
potentials, which could disturb measurements.
Notes for the RHM xx Typ HT
An additional potential equalising conductor must be connected between the sensor RHM xx HT and
the analytical electronics RHE – terminal 3 for all high temperature sensors RHM types HT (Ceramic
insulation). This is in order to compensate for the hygroscopic conducting effects of the ceramics
used.
The conductor must be laid on clean ground.
The cable shield is
only
connected to the earth screw of the sensor when high temperature sensors
are used.
HT- ground connection:
RHE
ground
RHM
terminal 3
ground
( see also informations in wiring diagram )
