Model IR-700
IR-700 Instruction Manual Rev. 4.3 Page 32 of 46
5. Service and Maintenance
NOTE: It is recommended for end-users to read and reference the procedures described in IEC 60079-29-2
for guidance on the proper installation, operation, and servicing of this type of combustible gas detector.
5.1 Calibration Frequency
In most applications, quarterly to biannual zero and semi-annual to annual span calibration intervals will assure
reliable detection. However, industrial environments differ. Upon initial installation and commissioning, close
frequency tests should be performed, weekly to monthly. Test results should be recorded and reviewed to
determine a suitable calibration interval.
5.2 Visual Inspection
The Sensor should be inspected annually. Inspect for signs of corrosion, pitting, and water damage. During
visual inspection, the Splash Guard should be removed and inspected to insure that it is not blocked. Examine
the porous 316SS flame arrestor within the sensor’s bottom housing for signs of physical blockage or severe
corrosion. Also, inspect inside the Junction Box for signs of water accumulation or Terminal Block corrosion.
5.3 Condensation Prevention Packet
A moisture condensation packet should be installed in every explosion proof Junction Box. The moisture
condensation prevention packet will prevent the internal volume of the J-Box from condensing and accumulating
moisture due to day-night humidity changes. This packet provides a critical function and should be replaced
annually. Detcon’s PN is 960-202200-000.
Plug-in Replacable
Combustible
Hydrocarbon Sensor
Splash Guard
Housing Bottom
Assembly
O-Rings
Lens and LCD
Display
Housing Bottom
Locking Set-Screw
Magnetic
Programming
Switches
Intelligent Transmitter Module (ITM)
Micro-Processor controlled circuit
encapsulated in an explosion proof
housing.
detcon inc.
LEL
MODEL
IR-700
Figure 18 Sensor Assembly
5.4 Replacement of IR Plug-in Combustible Gas Sensor
Caution: A hazardous area must be declassified before opening the junction box or
removing and replacing the plug in sensor
To Next Page
Loading...
