SENSITRON
A Halma Company
MTEX4899
SMART S-MS MED
Manuale (IT)
P. 31/36
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 standard.
7.1
PREVENTIVE MAINTENANCE ROUTINES
Within the European Union countries, bump testing and calibration procedures
of gas detectors are required by strict regulations and detailed in the IEC EN
60079-29-2.
This standard 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 checks and it defines that all gas detectors should undergo
periodical operational testing 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, according the IEC EN 60079-17.
7.2
CORRECTIVE MAINTENANCE ROUTINES
For any anomaly found during the functional test, please check the tests
performance as described 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.
For further information, refer to the calibration kit manual MT894.
7.3
NOTE ON IP GRADE
Warning
Please note that the IP rating indicated on the instrument label (in case of use
of the STGD/AD3 accessory) does not imply that the equipment will detect gas
during and after exposure to those conditions of dusta and water intrusion.
If exposed to the conditions representative of the IP rating, the equipment should
be checked and recalibrated with a higher frequency and in case of damage of
the IP protection cap, it must be replaced.
The goretex filter of the IP protection cap, should by no means be touched by
bare hands as this may alter the protection and the response in gas.
7.4
SENSOR HEAD SUBSTITUTION
If necessary, the sensor head can be substituted. First of all, the user must
request to Sensitron and Sensitron will give a proper kit and instructions.
Warning
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 source. After 10 minutes from power source
interruption, the equipment can be opened.
It’s strictly recommended the use of personal protective equipment during
operations inside the enclosure.
In case of tapered thread, use a thread-lock glue (Loctite 243 for example) on 2-3
threads