Line of Sight Infrared Hydrocarbon Gas Detector AutroPath HC800 , 116-P-HC800/IGB, Rev. A, 2016-03-03
P/N 95-8744, v4.2 , rev. 3/16
Autronica Fire and Security AS
Page 29
MaintEnancE
WARNING
Do not open cover when an explosive gas
atmosphere may be present.
NOTE
Refer to the AutroPath HC800 Safety Manual
for speci c requirements and recommendations
applicable to the proper installation, operation,
and maintenance of all SIL-Certi ed AutroPath
HC800 IR gas detectors.
ROUTINE INSPECTION
The AutroPath HC800 detector should be inspected
periodically to ensure that external obstructions such
as plastic bags, mud, snow, or other materials do not
block the path and thereby impair the performance of
the device.
OPTICS CLEANING
Cleaning of the AutroPath HC800 optical surfaces is
normally required only if an optical fault is indicated.
Thoroughly douse both window surfaces using a liberal
amount of isopropyl alcohol to clear away contaminant
particles. Repeat the alcohol fl ush to remove any
remaining contaminants.
WARNING
Bypass/Inhibit: Volatile organic compounds in
cleaning solutions could cause false alarms.
FUNCTIONAL CHECKING
Functional checks should be performed as required
by site conditions and local regulations. For specifi c
approval requirements regarding functional checks,
see appendices and the AutroPath HC800 safety
manual.
Autronica Fire and Security provides two functional
check options for the AutroPath HC800. The test lm
method provides a basic functional check as described
in step 20 of the basic alignment procedure.
Alternatively, the gas test cell method can be used
for a more precise output verifi cation. The gas cell
is typically used to verify the factory calibration of the
AutroPath HC800. The gas cell has a known optical
length and has infrared transparent windows on both
ends. When fi lled with 100% v/v gas, it contains a
specifi c LFL-m amount of gas. When the gas cell is
placed in the beam of the detector, the output will rise
to a specifi c value.
The gas cell is not intended for routine use. It does,
however, demonstrate in a very direct way the response
of the detector to hydrocarbons along with the resulting
control action. This is particularly useful when required
by regulatory authorities. See the gas cell instruction
manual for further details and use instructions.
PROTECTIVE CAPS AND COVERS
Ensure that the wiring compartment cover is installed and
fully engaged.
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