Emerson Rosemount 936, Reference Manual

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7 Maintenance
7.1 General maintenance
The source and detector viewing windows should be kept as clean as possible. The
frequency of cleaning operations depends on the existing environmental conditions and
the applications used.
7.2 Periodic maintenance
Emerson recommends keeping the source and detector viewing windows as clean as
possible.
Note
The frequency of cleaning operations is ultimately dependent upon the existing
environmental conditions and the applications used.
Things to keep in mind when performing periodic maintenance:
• Proper maintenance will allow the system to retain maximum performance and
reliability.
• Align the detector each time that the source or the detector has been opened or
moved for any reason.
• The signal verification check corroborates the current signals from the flash source
compared to that of previous alignments. Emerson recommends performing this
check every six to twelve months. Check the signal according to threshold levels.
See
Verifying signal .
• Zero calibrate (see Zero calibrate ) every time the detector or source is realigned or the
windows are cleaned.
7.2.1 Clean optical surfaces
The optical surfaces concerned are the source and detector viewing windows.
Procedure
1. Turn off the power to the detector and source.
2. In places where dust or dirt has accumulated on the optical surface, clean the
surface with a small, soft bristle brush.
3. Wash the surfaces thoroughly with water and a mild non-abrasive detergent.
4. Thoroughly rinse the glass surface with clean water, ensuring that no residue is left
behind.
5. Dry the glass with a clean, dry, soft cloth.
6. Enter the date and the names of the person and company who performed the
maintenance service in the maintenance logbook.
7. Turn on power to the detector and source.
Reference Manual Maintenance
00809-0100-4036 October 2021
Rosemount 936 59