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9 REPAIR
OR
REPLACEMENT
SAFETY PRECAUTIONS:
MAKE SURE THAT ALL SAFETY REQUIREMENTS AS DESCRIBED IN SECTION 4.1
ARE MET BEFORE ANY WORK IS COMMENCED.
NOTE:
If any work is carried out on the monitor, the following precautions should be taken
before any work is commenced:
Thoroughly clean the outside of all fittings, pipes and components, and surrounding
structure before any work commences;
When pipe lines are disconnected fit dust caps to pipes and unions, mask any
exposed surfaces and make certain that foreign matter cannot enter the system;
If flushing pipes, use a clean inert solvent, such as inhibited methyl chloroform, from
a clean container.
9.1 DETECTOR
CELL
Drawing
0806-1279
shows the detector cell and will help to visualize the following.
NOTE:
The internal parts of the detector cell have been chemically treated. it is important to
ensure that the coating remains intact and that no bare metal has been exposed.
9.1.1 Removing the detector cell
The detector cell does not require repairs but only removal for complete unit replacement.
To replace the detector cell the following procedure must be taken:
1. Relieve any pressure from the cell body.
2. Remove the upper pipe clamp above the cell.
3. Remove mounting bolts of the flow regulator.
4. Unscrew the upper coupling on flow sensor.
5. Unscrew the four upper hex drive bolts.
6. Remove the upper connection piece of the measurement cell and slide out to the front of the
skid assembly.
7. The centre section of the detector cell can now be removed.
8. The detector cell centre section must be removed and replaced including the attached cable.
As such the connection box must be opened and the cable gland loosened and terminals
undone.
9. The detector cell and cable can now be removed and replaced.
9.1.2 Reinstalling the detector cell
1. Ensure the lower O-ring is properly seated.
2. Slide the new centre section of the detector cell into place.
3. Slide the upper section of the cell into place and line up the holes.
4. Insert the four hex drive bolts and tighten the bolts.
5. Reconnect the upper pipework connection.
6. Tighten the pipe clamp and mounting bolts for the flow sensor.
7. Reconnect the cable inside the connection box and tighten the cable gland
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