How To Open Instrument Cover - Honeywell SPM Technical Handbook

2.5 How to Open Instrument Cover

The information in this section is provided to help protect
against instrument damage in case of the need to open
up the instrument cover and gain access to internal
components.
Note:
On purged units, purge pressure will be lost if
enclosure is opened.
Caution
Improper disassembly of the SPM enclosure
can cause internal tubing to become detached
from the sample inlet port (15) and result in loss
of monitoring. To protect against instrument
damage and to guard against possible loss of
monitoring, never allow the cover (29) to become
separated from the collar (30).
Warning
High voltage present on Line Powered units
Follow these important guidelines should it ever be
necessary to open up the SPM enclosure:
• Make sure electrical power is removed.
• The cover (29) and the collar (30) must always
remain connected to each other.
• During disassembly and reassembly, the
connection between the cover (29) and the collar
(30) must be secured by at least three cover
screws (20).
• To open the hinged collar (30) from the SPM
body (31), you must remove the collar fixing
screws (22), one at a time.
SPM Technical Handbook
SPM Single Point Monitor
• Observe that the collar fixing screws (22) are
mounted behind the cover screws (20).
• In order to reach each collar fixing screw (22),
you must temporarily remove the cover screw
(20) and the retaining ring (21).
• After removing each collar fixing screw (22) and
retaining ring (21), replace each cover screw (20)
in order to keep the collar (30) and the cover (29)
securely connected.
To replace the cover (29), follow these same guidelines
to install the collar fixing screws (22) and reassemble
the enclosure. Make sure that the cover (29) and collar
(30) stay connected throughout the entire procedure
and that the connection is always secured with at least
three cover screws (20).
Caution
Check all wiring harnesses and tubing lines to
make sure they are not pinched when the door is
closed.
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