Detcon CX-IR - Manual (Page 29)

Model CX-IR
5. Service and Maintenance
Calibration Frequency
In most applications, monthly to quarterly span calibration intervals will assure reliable detection. With
industrial environments varying, after 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.
Visual Inspection
The Sensor should be inspected annually for the following:
• Inspect the sensor for signs of corrosion, pitting, and water damage.
• Remove the Splash Guard and inspected it for blockage, broken, cracked, or missing pieces.
• For H2S Sensor assemblies, inspect CX-IR Series Splashguard Adapter Assembly with integral filter (P/N
602-003803-200) for blockage of filter material.
• Inspect inside of the Junction Box for signs of water accumulation, signs of corrosion.
• Check wiring to ensure there are no loose or pinched wires and all connections are clean and tight.
Condensation Prevention Packet
A moisture condensation packet should be installed in every explosion proof junction box. The 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.
5.1 Replacement of Plug-in Sensor
NOTE
It is not necessary to remove power while changing the plug-in toxic gas sensor in order to
maintain area classification. The sensor is intrinsically safe.
NOTE Only replace the plug-in sensor with an authorized CX-IR family of gas sensors.
ITM
(Bottom View)
Display
Window
Plug in Sensor
(Bottom view)
Locking
Setscrew
Locking
Setscrew
detcon inc .
MODEL
CXT-IR
Figure 14 Sensor Cell and ITM Mating
CX-IR Instruction Manual Rev. 1.2 Page 25 of 34