Det-Tronics Eagle Quantum 95-8470-05, Инструкция по эксплуатации

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XI-1 95-8470
Section XI
System Maintenance
ROUTINE MAINTENANCE
To ensure reliable protection, it is important to check
and calibrate the system on a regularly scheduled
basis. The frequency of these checks is determined by
the requirements of the particular installation.
MANUAL CHECK OF OUTPUT DEVICES
It is important that response devices be checked initially
when the system is installed, as well as periodically
during the on-going maintenance program.
CAUTION
Be sure to secure all output devices that are
actuated by the system to prevent unwanted
activation of this equipment, and remember to
place these same output devices back into service
when the checkout is complete.
O-RING MAINTENANCE
WARNING
The hazardous area must be de-classified prior to
removing a junction box cover with power applied.
A rubber O-ring is used to ensure that the junction box
cover will seal tightly and provide protection against
water ingress. Periodically the enclosure should be
opened and 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. When re-installing the ring,
be sure that it is properly seated in the groove on the
housing. It is imperative that this O-ring be properly
installed and in good condition. Failure to properly
maintain it can allow water to enter the enclosure and
cause premature failure. A coating of lubricant should
also be applied to the threads on the cover before re-
assembling the enclosure. This will both lubricate the
threads and help to prevent moisture from entering the
enclosure.
CAUTION
The O-rings should be lubricated with a silicone
free grease. The use of other lubricants is not
recommended, since they can adversely affect the
performance of some sensors. Under no
circumstances should a lubricant or compound
containing silicone be used on systems using
catalytic type combustible gas sensors.
FLAME DETECTOR MAINTENANCE
The flame detector requires no periodic calibration.
However, to maintain maximum sensitivity, the viewing
window must be kept clean at all times.
To clean the optical surfaces, remove the
oi
ring from
the detector by gently squeezing the tabs together and
then pulling out. Clean the viewing window and the
back side of the
oi
ring using a clean cloth or tissue
and Det-Tronics window cleaning solution. Avoid the
use of commercial glass cleaners, since many of them
can leave a UV absorbing residue on the surface.
Avoid leaving fingerprints on the reflective surface of the
oi
ring. Re-install the ring so that the opening is
positioned downward.
NOTE
If corrosive contaminants in the atmosphere cause
the reflective rings to deteriorate to the extent that
it is no longer possible to restore them to their
original condition, they must be replaced.
To ensure the watertight integrity of the detector, the O-
rings must be maintained following the guidelines
described above.
GAS SENSOR MAINTENANCE
All gas sensors must be calibrated on a regularly
scheduled basis, typically every 90 days for catalytic
and electrochemical sensors and annually for
PointWatch.
Catalytic sensors have a finite lifespan. If a successful
calibration cannot be performed, replace the sensor
and recalibrate following the procedure described in the
“Calibration” section. Exposure of the sensor to high
concentrations of combustible gases for extended
periods of time can introduce stress to the sensing
element and seriously affect its performance. After
exposure to a high concentration of combustible gas,
recalibration should be performed and, if necessary, the
sensor should be replaced.
Electrochemical sensors have a finite lifespan. If a
successful calibration cannot be performed, inspect the
hydrophobic filter. If the filter is plugged, replace it and
recalibrate the sensor. If the filter is in good condition,
replace the sensor. Recalibrate following the procedure
described in the “Calibration” section.
If the PointWatch fails calibration, refer to the
PointWatch manual.
NOTE
Compare part numbers to be sure that the correct
replacement sensor is being used.