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MAN0530 Issue 09 October 03 Searchline Excel
2104M0506
The second line shows the gas reading and measurement units along with a gas detector
status indicator.
The status character at the end of the second line indicates one of the following:
/ - Normal Operation
A spinning line shows the unit is in the fully active state.
- Inactive State
A stationary line shows the unit is in the inactive state.
w - Active Warning
F - Active Fault
B - Beam Blocked
(7) Switch off the Interrogator (see section 3.7.7 Finishing Up) and disconnect it from the
gas detector.
5.5 ALIGNMENT TELESCOPE
To clean the telescope lens/mirror:
(1) Moisten the surface of the lens/mirror by breathing on it.
(2) Using a soft tissue or lens cloth, lightly wipe the lens/mirror dry with a minimum number
of strokes.
The wiping material may be slightly dampened with a lens cleaning fluid as sold in any
camera store.
5.6 OPERATIONAL MAINTENANCE (FM)
As required as a criterion for the FM Performance Approval, routine operational verification is
recommended once within a three month period and is required once within a six month period
using one of the following methods.
WARNING
The following procedure will indicate a gas reading. Ensure all required personal
have been notified prior to starting and completing the procedure.
• Following the procedure described in section 5.1.2 insert a known test filter in the beam
path. Record the response to the test filter and verify that the response is within the
tolerance for stability and repeatability.
• Following the procedure described in section 5.1.3, test the unit s response to high %V/V
gas in a gassing cell. Verify that the response is within the tolerance for stability and
repeatability.
• For Cross-Duct units, follow the procedure described in section 4.7.2 and verify that the
response to high %V/V gas introduced into the gassing cell is within the tolerance for
stability and repeatability.
5. MAINTENANCE
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