Emerson Rosemount OCX 8800, Инструкция по эксплуатации

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Instruction Manual
IM-106-880C, OI
Repair Sensor
Housing
April 2017
Remove
Eductor
20
1
Disassemble O
2
Cell and Heater Strut Assembly
Do not attempt to replace the O
2
cell until all other possibilities for poor performance have been
considered. If cell replacement is needed, order the O
2
cell replacement kit (Refer to Section 10,
Replacement Parts ).
The O
2
cell replacement kit contains an O
2
cell and flange assembly, gaskets, socket head cap
screws, and anti-seize compound. The items are carefully packaged to preserve precise surface
finishes.
Do not remove items from the package until they are ready to be used.
1. Remove the four Allen cap screws (1, Figure 9-14 ) from the O
2
cell (2). Remove the O
2
cell. The cell flange has a notch that may be used to gently pry the flange away from
heater tube (3).
NOTE:
The pad on the end of contact/thermocouple assembly (4) will sometimes fuse to the O
2
cell (2).
2. If the O
2
cell is fused to the contact pad, push the O
2
cell back into the heater tube
(against spring pressure) and quickly twist the O
2
cell. The cell and contact pad should
separate. If the contact pad stays fused to the cell, a new contact/thermocouple
assembly (4) must be installed.
3. Remove and discard gasket (5). Clean the mating surface of heater tube (3). Remove
burrs and raised surfaces with a block of wood and crocus cloth.
Use care when handling contact and thermocouple assembly. The ceramic rod in this
assembly is fragile.
4. Remove screws (6), lockwashers (7), return wire (8), and heater strut assembly (9).
5. If replacing contact and thermocouple assembly (4), use a pencil to mark location of
spring clip (10) before removing. Squeeze tabs on spring clip to remove. Retain spring
clip and spring (11); replace if damaged.
6. While carefully handling new contact and thermocouple assembly (4) lay old assembly
next to new one. Transfer match marks to new assembly.
7. Carefully guide new contact and thermocouple assembly (4) through strut bracket
(12), spring (11), and spring clip (10) until spring clip reaches pencil mark.