Atest Gaz Sigma SmArt, User Manual

Page: 27 / 84

www.atestgaz.pl
6.4.3.2 Calibration procedure
The procedure for calibration / adjustment is based on:
switching the selected detectors to calibration mode – the calibration mode is recognized by the
control unit – it allows it to avoid unnecessary alarming of the environment as the detector
responds to the test gas,
activation of the registration mode in the program,
subsequent provision of the gas sequence (high concentration / air / high concentration) to the
various detectors. Indications of detectors automatically register in the service tool,
data analysis – entering the correction factors for detectors,
switching of the calibration mode,
conducting re-checking of the detectors.
During calibration the following is determined:
the degree of characteristics drift,
the degree of sinter contamination (measuring the response time T90),
the degree of sensor wear,
the power state of the sensor (if applicable).
Calibration can be performed only by persons specifically authorized by the manufacturer.
6.4.4 Handover inspection – reminder
The manner of conducting the handover inspection is described in section 6.2.2.
Below we remind you of only two key observations:
the handover inspection should provide for the examination of the detectors and the whole alarm
track for each detector,
the handover inspection should include suggestions as to the date of the first survey inspection.
The date of the first survey inspection should be no longer than 6 months (the period of 3 months
is recommended).
6.4.5 Checking the detectors before the survey inspection
In certain cases, in the period preceding the first survey inspection, it may be necessary to check detectors
– e. g. every two weeks, to determine their behavior. A period of two weeks may be too short to assess e. g.
corrosive atmospheres, so checking should not be equated with a survey inspection.
6.4.6 First survey inspection
The first survey inspection is performed for assessing the aggressiveness of the environment in which the
installation is situated.
On its basis it is possible to define the cycle of periodic inspections:
visual inspection of the installation; during this inspection it is also appropriate to check detectors
to determine the frequency of subsequent checks,
checking the detectors,
checking the alarm track for the selected alarm detectors.
p. 27|34
User's Manual: POD-009-ENG R07