ENGLISH
Pag. 33
7. Maintenance
The periodical check-ups and maintenance of the detectors, in the explosion-proof version,
must be carried out by expert personnel according to the criteria of the EN 60079-17 stan-
dard.
7.1 Preventive maintenance routines
Within the European Union countries, bump testing and calibration procedures of gas de-
tectors are required by strict regulations and detailed in the IEC EN 60079-29-2. This stan-
dard gives guidance on the selection, installation, use and maintenance of gas detectors
intended for use in industrial and commercial applications therefore the User have to read
the procedure described in IEC EN 60079-29-2 for reference.
The standard requires calibration and bump testing as well as recording of the performed
check-ups and it defines that all gas detectors should undergo periodical operational te-
sting according to the manufacturer’s specifications. Test results should be recorded into a
suitable book to be shown to the Local Jurisdiction Authority in case of inspection, accor-
ding the IEC EN 60079-17.
If there are chemical substances in the environment capable of altering the original cha-
racteristics of the sensors, maintenance operations must be carried out more frequently.
Periodically check the integrity of the threads and joints by restoring them with a film of
protective grease (do not use grease with silicone components).
For more information, refer to the manual for the calibration kit.
7.2 Corrective maintenance routines
For any anomaly found during the functional test, please check the tests performance as de-
scribed in paragraph 6. If during the preventive maintenance routine, the detector does not
react to the gas it has been calibrated for, please return the instrument to your supplier that
on his turn will return it to the manufacturer for repair. It is possible to adjust the calibration
parameters by employing the calibration keypad available on request.
7.3 Sensor head substitution
If necessary, the sensor head can be replaced, with prior authorization from Sensitron, with
a special kit and instructions provided by Sensitron.
It’s strictly forbidden open and close the equipment when it’s installed in hazardous area
and it’s powered-on. This operation can be conducted in safe zone and without power sour-
ce. After 10 minutes from power source interruption, the equipment can be opened.
It’s strictly recommended the use of personal protective equipment during operations insi-
de the enclosure.
In case of tapered thread, use a thread-lock glue (Loctite 243 for example) on 2-3 threads.
WARNING!
Summary of Contents for SMART3G-GrI
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