Emerson OCX 8800 Instruction Manual page 77

Instruction Manual
IM-106-880, Rev 1.0
January 2007
Figure 7-4. O Cell,
2
Thermocouple, and
Heater Connections
+
ORG
O2
-
GRN
2
HTR 02
1
2
HTR CO HTR 02
1
2
HTR SB
1
Remove O Cell and Heater Strut Assembly
2
1. Remove reference air tube (7, Figure 7-3) from sensor housing (8).
2. See Figure 7-4. Disconnect and tag O
wires, and thermocouple wires at the sensor housing terminals.
3. Remove the O cell and heater strut assembly (9, Figure 7-3) from
2
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 7-4.
O Cell Wires
2
O Heater Wires
2
Thermocouple Wires
-
RED
T/C O2
+
YEL
-
T/C CO
+
-
T/C SB
+
Sample
Block
-
EXC
Thermo-
couple
-
CJC
+
-
CO REF
+
-
CO ACT
+
+
EXC
heater wires, O
2
OCX 8800
+ +
+
+ +
O Cell and Heater Strut
2
Assembly
Sample Block
Heater Rods
Thermal
Switch
cell and return
2
7-7