Ntron SIL O2, User'S Operation Manual, Page: 22 / 56

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3.5 General Maintenance
Establish a periodic checking and maintenance routine in line with the requirements for Safety Instrumented
Systems. See the Ntron SIL O2 Analyser Technical and Safety manual for further details.
The SIL O2 Analyser requires little physical maintenance. The user Enclosure into which it is housed
should provide protection against a build up of dust or other contaminants on the surface of the SIL O2
Analyser housing. If such contaminants are seen during regular inspection, such can be removed by gentle
suction device or by wiping with a damp but not wet, cloth. The ingress of such contaminants should be
investigated.
Ensure all wiring to the SIL O2 Analyser is secure and in good condition, paying particular attention to the
security of the connection terminals if the user enclosure is subject to vibrations.
There are no user serviceable parts within the SIL O2 Analyser. If any malfunction is detected, mechanical
or electrical, the SIL O2 Analyser should be immediately removed from service following the correct
protocols.
The Sensor used has a finite life span. The Performance of the Sensor is verified by calibration check and
this should be performed according to the protocols required by the safety system. Replacement of the
Sensor is necessary when it does not meet the required performance levels.
During operation life, the Sensor should be kept clean of contaminants. It can be wiped with a soft damp
cloth. Observe the restrictions regarding potential static charges as detailed on the Sensor Installation
Instruction Documents found in the appendix to this manual.
When removing Sensors from their process installation for replacement or other service requirements,
observe the following points.
•
Ensure any and all system shut down protocols are followed as applicable.
•
Do not disconnect the Sensor from the connecting cables whilst the system is operating or is
‘Live’.
•
Ensure the process being measured is shut down or the Sensor connection is isolated by any
intermediate valve mechanism if fitted.
•
Always remove the Sensor connector before unscrewing the OC-25/OC-200 Sensors or
unclamping the OC-26 Sensors from their process fittings
•
Block off the exposed process connection if required during the period the Sensor is disconnected.
•
Protect the disconnected Sensor cable from damage during the period the Sensor is disconnected.