Honeywell Sensepoint XCD RFD - General Maintenance; Operational Life

Sensepoint XCD RFD Technical Manual SPXCDHMRFENU Issue 1
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11 General Maintenance
For remote Flammable sensors used with the XCD RFD Transmitter, please refer to the
individual sensor manual for specic recommended calibration periods.
11.1 Operational Life
The equipment should be checked following exposure to known contaminants.
Recalibrated if necessary.
The pellistors used in the Catalytic flammable gas sensor can suffer from a loss of
sensitivity when in the presence of poisons or inhibitors, e.g. silicones, sulphides, chlorine,
lead or halogenated hydrocarbons. The pellistors are poison resistant to maximize the
operational life of the Catalytic ammable sensor. A typical operating life, subject to the
presence of poisons/inhibitors is 36 months.
Refer to section 12 for sensor replacement procedures.
WARNINGS
Access to the interior of the transmitter, when carrying out any work, must only be
conducted by trained personnel.
Before carrying out any work ensure local regulations and site procedures are followed.
Appropriate standards must be followed to maintain the overall certication of the sensor
and transmitter.
To reduce the risk of ignition of hazardous atmosphere, de-classify the area or disconnect
the equipment from the supply circuit before opening the transmitter enclosure. Keep
assembly tightly closed during operation.
Never attempt to open a junction box/enclosure or replace/ret the sensor in potentially
hazardous atmospheres.
Take care when handling sensors as they may contain corrosive solutions.
Do not tamper with or in any way disassemble the sensor.
Do not expose to temperatures outside the recommended ranges.
Do not expose sensors under storage conditions to organic solvents or ammable liquids.