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SPM Flex Gas Detector
Converting a detector from fixed to portable
A fixed-installation SPM Flex gas detector can be converted for portable
applications following this procedure:
1. Remove the detector from its mounting bracket (see “Standard mounting bracket”
on page 29 or “Backward-compatible mounting bracket” on page 30).
Handle Shoulder
strap
ring (2)
Thumbscrew
Hex screw (2)
Bracket
pin
Hex
screw
Snap-in
bracket
Detail
Figure 24. Handle removal
2. Slide the handle into place as shown above.
3. Secure the snap-in bracket on the bracket pin with one of the 1/8-inch hex screws,
as shown in the detail illustration.
4. Repeat on the other side of the detector.
5. The handle is hinged to allow access to the Chemcassette cartridge compartment.
Lower the handle and secure it with the thumbscrew.
6. If the optional shoulder strap is to be used, attach its spring clips to each of the
rings on the detector’s handle. The strap must be laundered before use in clean-
room applications.
In-line filters
For most gases, it is imperative to use an external filter to protect the tubing and
the detector from contamination� Use particulate filter part number 780248 for
non-corrosive gases� Use filter 1991-0147 for corrosive gases� Refer to “Detectable
Gases” on page 62 for specific gases� Replace the filters after every 3 to 6
months of operation, depending on the cleanliness of the installation environment�
Note that filters are not used with diisocyanates, hydrazine, ozone, or hydrogen
peroxide so regular maintenance cleaning is especially important for detectors
exposed to those gases�
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