Atest Gaz Alpa EcoTerm XT, User Manual

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the condition for admitting the system to use is conducting all the inspection operations with a
positive result.
9.4 Periodical operations
During the operation of the gasometric system, it is necessary to be aware of the fact that the detectors –
and most of all the sensors – are components susceptible to aging and environmental impacts. Therefore,
the maintenance process must be performed systematically.
These operations may be conducted by trained services only, in accordance with the art, general safety
principles and special installation conditions.
The periodic operations include:
periodic inspections,
calibration of detectors,
replacement of consumables.
9.4.1 Calibration
The gas sensor incorporated into the detector subjects to ageing and environmental impacts, therefore
worsening of its sensitivity in pace with time passing is a normal phenomenon.
To compensate that effect it is necessary to carry out maintenance services for detectors and their
calibration under regular schedule (calibration frequency is specified in the Calibration Certificate – see
Table 8). These services should be carried out for the Alpa EcoTerm XT Gas Detectors by a competent
service company authorized by the manufacturer. The calibration can be carried out in several ways:
detectors can be removed from the system and sent to the manufacturer for calibration,
only MiniPal measuring heads can be taken out from Alpa EcoTerm XT Gas Detectors after opening
of the device housing (see Figure 1) and sent to the manufacturer for calibration. Remember to
mandatory power the gas detector off prior to disassembling.
refer to a service company authorized by the manufacturer to carry out the calibration process on
site.
All expenses related to calibration (p&p, calibration itself and travelling expenses of calibration engineers
shall be borne by users.
9.4.2 Replacement of consumables
Details of the lifetime of consumables can be found in Table 9.
9.4.2.1 Replacement of the MiniPel Measuring Head
Metrological parameters or gas sensors subject to normal deterioration over operation time of gas
detectors. Consequences of that phenomenon can be compensated by scheduled, regular adjustment of
detector indications until the critical condition of the sensor is achieved and it must be replaced with a new
one.
However, it is impossible to replace the sensor alone. The replaceable component is the entire measuring
head – see Table 9.
To replace the head proceed in the following way:
switch off the power voltage for the detector,
undo the locking screw (see Figure 1),
disconnect the head from its plug-in socket and connect a new head,
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User Manual: POD-044-ENG R01