Envent 330S-Ex, User Manual

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Envent Engineering Ltd. Page 36 Revision 1
Sample Conditioning System Cleaning Procedure
During start-up or plant upset situations, the 330S-Ex/330SDS-Ex H2S
analyzer may become contaminated with amine or hydrogen sulfide
scavenger solution. This may cause the analyzer to read low (this can be
determined at calibration). If the analyzer reads low, it will require incremental
increases in the gain to maintain calibration. Please refer to factory calibration
sheet for factory set gain factor. The scavenger solution is water soluble and
therefore is relatively easy to clean.
Material List
Cleaning Kit Part Number: 330900
•
Alconox RBS Solid, powdered precision cleaner w/ MSDS (2.5 tbsp)
•
330079 – Rear window and gasket
•
MIF-225-PP – Small nipple (x2)
•
MIF-32-PVC – Grey nipple
• MIF-32-PP – Big nipple
• MIF-24-PVC – Humidifier replacement tube fittings (x2)
• MIP-4 Humidifier replacement plug
• 06349-40 – Black 1/8" male/female elbow
• LT-2-4 (1/4" x 11") (0.635 x 27.94 cm) – Tubing for sample chamber
to humidifier
• LT-2-4 (1/4" x 10") (0.635 x 25.4 cm) – Tubing for flow meter to
humidifier
•
LT-3-5 (3/16" x 10") (0.77625 x 25.4 cm) – Tubing for sample
chamber to vent block
•
PFA (24") (60.96 cm) – Tubing for flowmeter to bulkhead
Do not use solvents, brake cleaners, soaps, detergents or rubbing alcohol to
clean up analyzer or sample system.
Procedure
1. Mix a 1% (2-1/2 tbsp per gallon) of Alconox in warm water
2. Sample line tubing
•
Shut off flow at the sample point prior to sample conditioning system
•
Flush the sample line and components with cleaning solution
•
Rinse with fresh water
•
Flush with isopropyl alcohol
•
Dry with clean, dry instrument air or gas
3. Sample conditioning system – Take pictures of SCS before
disassembling
• Remove filter elements from filter housings and discard
• Remove all sample conditioning system components and soak in
cleaning solution
• Ensure valves are fully open when cleaning