Repair Sensor Housing; Sensor Housing Disassembly - Emerson Rosemount OCX8800 Instruction Manual

Instruction Manual
IM-106-880C, OI
5.
6.
7.
8.
9.
10.
11.
12.
13.
9.4

Repair Sensor Housing

Use the following procedures to remove damaged components from the Hazardous Area OCX
8800 sensor housing and to install new replacement parts. Disassemble the unit only as needed
to replace damaged components. Use the assembly procedures that apply to install
replacement parts and reassemble the unit.
9.4.1

Sensor Housing Disassembly

Remove Cover and Terminals Insulator
1.
2.
3.
4.
Repair Sensor
Housing
Connect the heater cable leads to the heater power connector (J3).
Connect the line (L1 wire) to the L1 terminal, and the neutral (N wire) to the N terminal
on the AC power input terminal block,
Connect the ground lead to the ground stud. Secure the connection with two nuts.
Attach a separate ground lead (G wire) from the ground stud to the G terminal on the
power input terminal block.
If used, connect external relay leads to the alarm output relay terminal.
Connect the test gas and instrument air lines to the remote electronics housing.
Connect the calibration gas line and instrument air line to the remote electronics
housing.
Refer to Figure 9-3 and Figure
connections are complete.
Install the cover on the electronics housing.
Turn on the test gasses at the cylinders and open the instrument air valve.
Restore power to the system.
Loosen screw (1, Figure 9-7) and slide locking clip (2) away from cover. Retighten screw
(1).
With two hands or strap wrench, turn cover (3) counterclockwise to loosen. Unthread
and remove cover.
Inspect cover o-ring (4) for wear or damage. Replace cover o-ring if damaged.
Unsnap terminal marking plates (5) and remove terminal insulator (6).
Figure 9-6.
9-6. Make sure all test gas lines and electrical
Repair Sensor
Housing
April 2017
18
9