Emerson ROSEMOUNT OCX 8800 - Manual (Page 72)

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
6-10
Figure 6-6. O
2
Cell,
Thermocouple, and
Heater Connections
Remove O
2
Cell and Heater Strut Assembly
1. Remove reference air tube (7, Figure 6-5) from sensor housing (8).
2. See Figure 6-6. Disconnect and tag O
2
heater wires, O
2
cell and return
wires, and thermocouple wires at the sensor housing terminals.
3. Remove the O
2
cell and heater strut assembly (9, Figure 6-5) from
sensor housing (8). Remove and discard gasket (10).
Remove Sample Block Heater Rods
1. Disconnect sample block heater rod wires from terminal block. Refer to
Figure 6-6.
+ +
+ +
O2
Thermocouple Wires
ORG RED
T/C O2
T/C CO
T/C SB
EXC
CJC
O Cell Wires
2
O Heater Wires
2
Return
Wire
O Cell and Heater Strut
Assembly
2
CO REF
CO ACT
Sensor Housing
T
erminals
+
-
HTR 02
HTR SB
2
GRN
2
1
+
-
+
-
+
-
+
-
+
-
+
YEL
-
+
+
37390069
HTR 02
2
1
Sample Block
Heater Rods
Thermal
Switch
HTR CO
1
EXC -
Sample
Block
Thermo-
couple