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3.1
MAINTENANCE
ROUTINE INSPECTION
The PointWatch Eclipse detector should be inspected
periodically to ensure that external obstructions such as
plastic bags, mud, snow, or other materials do not block
the weather baffle, thereby impairing the performance
of the device. In addition, the weather baffle assembly
should be removed and inspected to ensure that the
diffusion paths into the measurement chamber are clear.
See Figure 17.
WEATHER BAFFLE CLEANING
Remove the weather baffle assembly and clean with a
soft brush and soap and water. Rinse and allow to dry.
Replace the weather baffle if damaged or if fouling of the
baffle vents is evident.
NOTE
Solvents may damage the weather baffle
assembly. If contamination is not removed using
soap and water, then replacement of the baffle
may be required.
OPTICS CLEANING
Cleaning of the Eclipse optical surfaces is normally
required only if an optical fault is indicated.
Thoroughly douse the mirror and window using a liberal
amount of isopropyl alcohol to clear away contaminant
particles. Repeat the alcohol flush to remove any
remaining contaminants. Allow the assembly to air-dry in
a dust-free location.
O-RING
Periodically the O-ring should be inspected for breaks,
cracks and dryness. To test the ring, remove it from the
enclosure and stretch it slightly. If cracks are visible,
it should be replaced. If it feels dry, a thin coating of
lubricant should be applied. See “Spare Parts” section
for recommended lubricant. When re-installing the ring,
be sure that it is properly seated in the groove.
PROTECTIVE CAPS AND COVERS
The calibration nozzle cap must always be installed,
except while performing calibration. Also ensure that
the HART Communication Port cover and the wiring
compartment cover are installed and fully engaged.
HYDROPHOBIC FILTER
DIFFUSION PATHS INTO MEASUREMENT CHAMBER
MIRROR
IR SOURCE LAMP
AND WINDOW
O-RING
C2059
Figure 17—PointWatch Eclipse with Baffle Removed
