BA02191C SS2100 H
2
S TDLAS Gas Analyzer
Endress+Hauser B-19
To replace the scrubber and scrubber efficiency indicator
1. Close the sample supply shut-off valve. Allow all residual gas to
dissipate as indicated by no flow on the sample bypass flow meter.
2. Unscrew the compression nuts on the inlet end of the scrubber and
scrubber efficiency indicator assembly.
3. To install the new scrubber and indicator, insert the inlet and outlet
tubes into the compression fittings of a new scrubber and scrubber
efficiency indicator assembly, ensuring each are oriented correctly,
according to the flow pattern shown in Figure B–12 on page B–18.
4. Tighten all new fittings 1-1/4 turns with a wrench from finger tight.
For connections with previously swaged ferrules, thread the nut to
the previously pulled up position, then tighten slightly with a wrench.
5. Reset the scrubber lifetime monitor with the New Scrub Installed
parameter and the General Fault Alarm with the Reset option for
the General Alarm
DO parameter (see “To change parameters in
Mode 2” in the Description of Device Parameters for your analyzer).
6. Restart the SCS.
7. Check all connections for gas leaks. Using a liquid leak detector is
recommended.
8. Re-validate the system with an appropriate gas standard following
the instructions under “Validating the Analyzer” in the
Description of Device Parameters for your analyzer.
9. Purge the scrubber and scrubber efficiency indicator assembly with
nitrogen to remove all flammable gas and cap the inlet and outlet.
All valves, regulators, switches, etc. should be operated in
accordance with site lock-out/tag-out procedures.
H
2
S scrubbers and scrubber indicators contain Copper (II) Oxide
[CAS# 1317-38-0] and basic cupric carbonate [CAS# 12069-69-
1], which are harmful if swallowed and toxic to aquatic organisms.
Handle with care and avoid contact with the internal substances.
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