Specifications

MAINTENANCE and SERVICE
5.5 Detector Assembly
Refer to Figure 5-5 and Figure 5-6.
REACTION CHAMBER REMOVAL:
Disconnect the stainless steel tubing lines at the Gyrolok fittings. Remove
the (4) nuts holding the Detector Assembly to the chassis. Disconnect the
plug from connector J1 on the Signal Board and remove the assembly from
the chassis.
Note: Heatsink Compound. Care should be taken to avoid getting
heatsink compound on optical surfaces. If this substance is removed
during the disassembly process, a zinc-oxide-filled, silicone grease
(e.g., Dow Corning 340 or EG&G Wakefield Engineering's Series 120
Thermal Joint Compound) be reapplied in the re-assembly of this
component.
Although the heater and thermostat can be removed to facilitate handling,
contact with the white heatsink compound can be minimized by leaving
these items in place. Remove the (2) screws holding the top plate of the
Detector , and move the plate along the wires and away from the Detector .
Remove the (2) screws holding the tube assembly in place. Hold the tubing
with one hand while inverting the Detector Housing with the other, allowing
the Reaction Chamber O-ring and window to be removed from below.
REACTION CHAMBER INSTALLATION:
To reinstall, hold the housing in the inverted position while sliding the
Reaction Chamber O-ring and window into position and the tubing into the
slot in the housing. Hold the Reaction Chamber in place while rotating the
housing upright. Replace the hold-down screws.
Note: Component Positioning. The procedure described above is for
the purpose of maintaining the relative positions of windows and
O-ring to the Reaction Chamber during installation.
Replace the top cap and screws. Reverse the removal procedure to
reinstall the Detector Assembly into the Analyzer Module.
PHOTODIODE REMOVAL:
Remove the Detector Assembly as described above. Invert the housing to
access the mounting bracket. Remove the (3) screws and shoulder
Rosemount Analytical µCEM Continuous Analyzer Transmitter 5-5