Sensepoint XCD RTD Technical Manual SPXCDHMRTEN Issue 1
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11 General Maintenance
Honeywell Analytics recommends that gas detectors are tested and re-calibrated on a six-
monthly basis, or according to site practice. For Sensepoint Toxic sensors that are used
either directly with XCD RTD transmitter or remotely mounted in a separate junction box,
please refer to individual sensor manual for specific recommended calibration periods.
11.1 Operational Life
Typical life of a toxic gas sensor is dependant on the application, frequency and amount
of gas exposure. Under normal conditions (3 monthly visual inspection and 6 monthly test/
re-calibration), the XCD toxic sensors have an expected life equal to or greater than 24
months. The XCD Oxygen sensor has an expected life equal to or greater than 12 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 certification 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/refit 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 flammable liquids.
At the end of their working life, replacement electrochemical sensors for oxygen and toxic
gas must be disposed of in an environmentally safe manner. Disposal should be according
to local waste management requirements and environmental legislation.
Alternatively, old replaceable sensors may be securely packaged and returned to Honeywell
Analytics clearly marked for environmental disposal.
Electrochemical sensors should NOT be incinerated as this action may cause the cell to
emit toxic fumes.
Caution: Oxygen deficient atmospheres (less than 6%V/V) may result in inaccuracy of
reading and performance.
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