Model FP-700
FP-700 Instruction Manual Rev. 5.1 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
detectors.
5.1 Calibration Frequency
In most applications, quarterly to biannual zero and 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 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.
Housing Bottom
Locking Set-Screw
Splash Guard
O-Rings
Intelligent ransmitter Module (ITM)
Microprocessor controlled circuit
encapsulated in an explosion
proof housing.
Bottom Housing
Assembly
Plug-In replaceable
H2S Sensor
Magnetic
Programming
Switches
Lens and LCD
Display
Interconnect Wiring
detcon inc.
LEL Sensor
MODEL
FP-700
Figure 18 Sensor Assembly
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