Examining And Caring For The Flamepaths - Ametek 241CE II Operator's Manual

6-24 | Model 241CE II Hydrocarbon Dewpoint Analyzer

Examining and Caring For the Flamepaths

The analyzer is designed with flamepaths that will prevent flame propa-
gation from within the analyzer's Electronics Enclosure to the outside,
should an internal explosion occur.
The flamepaths on the analyzer consist of:
• The Electronics Enclosure's joining surfaces (flange on enclosure/en-
closure door).
During each analyzer maintenance, use a feeler gauge to check the
flamepath gap of the Electronics Enclosure flanges (enclosure door
and housing joining surfaces). The surfaces of the flanges must be flat
(0.05 mm or better) and the minimum flamepath must be at least 38 mm.
When the bolts are tightened, the flamepath gap must not exceed
0.08 mm. Use stainless steel fasteners with yield stress ≥450 MPa
(65,300 PSI). See Warning below.
• The User Interface's push-buttons and Window Housing assembly
(Figure 6-3).
Examine the push-buttons on the User Interface for signs of wear
or damage (color loss or scratches on the cylindrical portion of the
push-buttons). See Warning below.
• All separable joints in the Heatsink/Measuring Cell assemblies (Figure
6-1).
If the Heatsink/Measuring Cell assemblies are separated as part of
analyzer maintenance, examine the surfaces of the flanges for scratch-
es or indentation, or other damage. See Warning below.
!
Do not apply AC power to the analyzer if any of its flamepaths appear
to be scratched, dented, or worn. Applying power to an analyzer with
WARNING
a damaged flamepath is dangerous and could result in serious injury
or death to personnel and/or serious damage to equipment.
Replace the parts immediately if damage or wear is apparent. Contact
AMETEK immediately if there is any doubt about the integrity of any
flamepath.