Model S4100C
23
5.0 Maintenance
WARNING - Installation and Maintenance must be carried out by suitably skilled and
competent personnel only.
5.1 Maintenance
Once correctly installed, systems require very little maintenance other than Routine
Re-calibration (see section 4) and periodic inspection.
Sensors exposed to the elements may require a little grease on the accessory
mounting threads. The grease must be free from silicones (Refer to Sensor Poisons)
and have a high melting point. Alternatively P.T.F.E. tape may be used.
The removal of particulate matter from sensor accessories may be facilitated by the
use of an appropriate halogen-free solvent. The accessories should be thoroughly
dried, with compressed air if necessary, before refitting to the sensor body.
General Monitors strongly recommends that the complete system, including all alarm
circuitry be tested at least annually and that the following checks be carried out:
• All Smart Transmitter assemblies for suitability of mounting positions so that
modifications to plant layout have not affected these.
• Security of mounting
• Sensor flame arrestors for clogging due to water, oil, dust, paint or other
contaminants.
• Sensor accessories where fitted
• Condition of fastening of cables.
• Air filters, where fitted
• Operation of complete system on stand-by supplies, where fitted, for the full
prescribed time.
5.2 Storage
Modules should be stored in a clean dry area and within the temperature range
quoted in the Specification (see Section 2):
When prolonged storage is anticipated, modules should be sealed, together with a
desiccant, into plastic bags and double wrapped for protection.
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