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3098 Technical Manual Maintenance & Fault Finding
5-9
5.2.6 Further Servicing of the Density Meter (Figure 5-2)
Once the density meter has been removed from the 3098 metalwork and the electronics housing removed, the unit can be
further serviced by following the instructions below:
NOTE: THE CYLINDER WALL IS FRAGILE. GREAT CARE MUST BE SHOWN DURING THE REMOVAL, HANDLING
AND REFITTING OF THE CYLINDER AND ITS HOUSING. HOLD ONLY BY THE CLAMPING SECTION.
1. Referring to figure 5-3, remove the six screws (item 3) which secure the cylinder housing (item 2) to the mounting
housing (item 1).
2. Exercising great care, ease off the cylinder housing in an axial direction, allowing access to the cylinder/spoolbody
assembly.
3. Carefully lift off the cylinder (item 4) and clean by lightly wiping with a lint-free tissue soaked in an appropriate solvent.
4. Again, exercising great care, ease out the spoolbody (item 5). Clean the spoolbody and examine for corrosion.
If no corrosion or other damage is apparent on any of the piece parts, the instrument may be reassembled in reverse
order. During re-assembly of the sensing element, special attention is required to correctly orientate the
cylinder/spoolbody combination (see Figure 5-4).
Re-fit the meter to the 3098, by following the operations above in reverse order, making sure that the scribe marks align
as shown in Figure 5-4.
Note: It is recommended that O-rings be renewed during re-assembly and LIGHTLY COATED with silicone grease.
Scribe Lines to be
aligned.
Figure 5-4: Spoolbody/Cylinder alignment