5200 Multi Purpose and 5200 Multi Purpose HF Gas Analysers
05230001A / Revision 990
A7.6 Additional maintenance
A7.7 Draining the catchpot
Refer to Figure A3. During use, liquid entrained in the sampled gases will be
condensed in the catchpot (6).
When necessary (that is, when liquid is visible in the transparent body of the catchpot):
1. Place a suitable container under the catchpot drain plug (5).
2. Remove the drain plug and allow the liquid to drain from the catchpot.
3. Refit the drain plug and safely dispose of the drained liquid: refer to Section 9.2.
A7.8 Replacing/regenerating the drying agent
The colour of the silica gel drying agent in the drier is orange as supplied, and the
column of drying agent will turn progressively green as moisture is absorbed. When
the whole column of drying agent has turned green, the drying agent needs to be
regenerated or replaced.
You can regenerate the drying agent by passing dry air or dry nitrogen through the
drier, or:
• Removing it from the drier and laying it out on a tray, approximately 1 granule thick.
• Heating the silica gel on the tray in an oven at a temperature of 110 to 120
o
C (230
to 248
o
F) until the granules have turned orange again, or heating the calcium
sulphate (Drierite
®
) on the tray at a temperature of 210
o
C (425
o
F) for 1 hour.
The drying agent supplied will turn orange again when it has been successfully
regenerated. More than 100 regenerations can be made before the drying agent
becomes ineffective.
When necessary, dispose of the drying agent and replace with new drying agent,
available as a spare (see Section A7.9).
+
Do not allow the level of liquid in the catchpot to rise above the top of the
transparent body of the catchpot.
WARNING
If you replace the drying agent, ensure that you comply with any safe
handling and usage requirements specified on or with the package
containing the new drying agent.
+
If required, replace the silica gel drying agent supplied with calcium sulphate
(for example, use Drierite
®
), to reduce the response time: see Section A7.2.
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