Sensor Housing Leak Test; Repair Electronics Housing - Emerson Rosemount OCX8800 Instruction Manual

Repair Electronics
Housing
April 2017
9.4.15

Sensor Housing Leak Test

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9.5

Repair Electronics Housing

Use the following procedures to remove damaged components from the Hazardous Area OCX
8800 electronics 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.
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4
Install 1/4 NPT cap on dilution air inlet fitting. Install a 1/4 NPT cap on sample tube (2,
Figure 9-13) or plug 1/4 NPT sample inlet port. Capped or plugged ports must be air
tight.
If not in place, install exhaust tube (3,
instructions provided.
Connect a calibrated manometer to the CAL GAS inlet port.
Connect and apply clean instrument air at 45 psig (310 kPa gage) to the instrument air
inlet fitting.
Observe the manometer reading. The reading should be from 10 to 13 inches, Water
Column. Locate and correct leaks if the reading is less than 10 inches WC.
Figure 9-13) in exhaust port according to the
Instruction Manual
IM-106-880C, OI
Sensor Housing Leak
Test