TELEDYNE OLDHAM SIMTRONICS OLCT 80 d, Руководство пользователя

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OLCT 80
GAS TRANSMITTER
USER MANUAL
NPO80GB
Revision F.1
73
8 Preventative Maintenance
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.
8.1 Maintenance frequency
Gas detectors are safety devices. TELEDYNE OLDHAM SIMTRONICS 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. TELEDYNE
OLDHAM SIMTRONICS is not responsible for implementing safety procedures.
8.2 OLCT 80
Periodic maintenance involves the following steps:
•
Remove dust from the sensor's protective housing, using a dry cloth only. Do not use water
or any type of solvent.
•
When using the equipment in dusty explosive atmospheres, the equipment should be
thoroughly cleaned on a regular basis to prevent the build-up of dust. If a layer of dust
does build up on the detector, this layer may not exceed 5 mm.
•
Replace the screws: use high-quality screws > A4.70.
•
Perform the zero test with clean air: follow the steps described under
Sensor calibration
on page 44 in the event of deviation.
•
Perform the gas sensitivity test: follow the steps described under
Sensor calibration on
page 44 in the event of deviation.