Service and Maintenance
Installation and Operation Manual - COMTEC
®
6000 ATEX GasEx
60
Doc.-ID: COMGAS_11022020_EN
Replacing the Probe Inner Part
5.9
Disconnect all wires of the probe in
the connection box and loosen the
two nuts
of the holding plate.
Carefully pull out the probe inner
part
. (4 hole ceramic rod with
signal measuring wire, thermocouple
elements and heater).
Push the new inner part carefully
into the probe (the inner part is
pressed by the holding plate with
spring pressure)
, screw the two
nuts back on and connect all wires.
Figure 34 -
Replacing the probe
inner part
Terminal
Colour
Description
Polarity Unit
1 white/brown
Signal
wire,
O
2
sensor
- mV
2 orange signal
wire,
O
2
sensor
+ mV
3
green
thermocouple element 1
+ mV
4
white
thermocouple element 1
- mV
31
green
thermocouple element 2 (with HCU)
+ mV
41
white
thermocouple element 2 (with HCU)
- mV
6
black
heating element O
2
7
blue
heating element O
2
8 green/yellow
ground/earth
11 white/red
(no.1)
CO
e
-sensor measuring value
12 white/red
(no.2)
CO
e
-sensor measuring value
13 red
(no.3) CO
e
-sensor heating element
14 red
(no.4) CO
e
-sensor heating element
