The operations explained in this section must be performed by
authorized, qualified personnel because they could affect detection
reliability. Inspection and maintenance must be carried out in
accordance with the current editions of EN60079-17 and eventually
with any local or national additional requirements that may apply in
the country of installation.
It is prohibited to open the transmitter when energized
Periodic inspections ensure that the equipment and system is functioning
properly and providing reliable detection services. The section describes the
preventative maintenance procedures required and how often they are to be
performed. Inspection and maintenance must be carried out in accordance with
the current editions of EN60079-17 and eventually with any local or national
additional requirements that may apply in the country of installation.
Maintenance frequency
Gas detectors are safety devices. Oldham recommends regular testing of fixed
gas detection installations. This type of test involves injecting a standard gas of
sufficient concentration into the detector to trigger pre-set alarms. This test does
not, in any event, replace a full calibration of the detector.
Frequency of gas testing depends on the industrial application in which the
detector is used. Inspection should occur frequently during the months following
installation start-up; later it may be spaced out if no significant problem is
observed. If a detector does not react upon contact with gas, it must be
calibrated. Calibration frequency will depend on the results of these tests
(moisture, temperature, dust, etc.); however, the device should be calibrated at
least once per year.
The site manager is responsible for implementing the safety procedures at the
site. Oldham is not responsible for implementing safety procedures.
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