PN 903-8797, Rev A
Examining and Caring for the Flamepaths
The analyzer is designed with amepaths that will prevent ame propaga-
tion from within the analyzer’s Electronics Enclosure to the outside, should an
internal explosion occur.
The amepaths on the analyzer consist of:
• The Electronics Enclosure’s joining surfaces (ange on enclosure/enclosure
door).
During each analyzer maintenance, use a feeler gauge to check the
amepath gap of the Electronics Enclosure anges (enclosure door
and housing joining surfaces). The surfaces of the anges must be at
(0.05 mm or better) and the minimum amepath must be at least 38mm.
When the bolts are tightened, the amepath gap must not exceed
0.08mm. 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
4-3).
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 4-1).
If the Heatsink/Measuring Cell assemblies are separated as part of
analyzer maintenance, examine the surfaces of the anges for scratches
or indentation, or other damage. See Warning below.
Do not apply AC power to the analyzer if any of its amepaths appear
to be scratched, dented, or worn. Applying power to an analyzer with
a damaged amepath 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
amepath.
Maintenance and Troubleshooting | 4-29
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