23
ENG
Gas Leakage Detector +0300047IE rel 1.1 - 26.04.2023
Maintenance
4. MAINTENANCE
4.1 Calibration procedure
The calibration procedure is performed periodically and involves introducing a known gas concentration at the sensor inlet,
using the calibration kit.
The need to perform calibration is signalled by a speci c variable on the supervisor. Each type of device has a di erent calibra-
tion interval, as described in the technical speci cations table. After a few years of operation, the sensor needs to be replaced,
as described in the following chapters, as the calibration is no longer su cient to guarantee reliability of the measurement
performed.
Calibration is performed by connecting the kit described in the following chapter. It is also recommended to read the chapters
on calibration via app or supervisor before connecting the kit, so as to choose the most suitable calibration method.
For semiconductor versions (group, 1, 2, 3), it is recommended to wait at least 48 hours between exposures to the gas, to allow
the sensor to reset and make a correct measurement. The sensor should be exposed to the known gas concentration for a lim-
ited time: recommended time 3 minutes, maximum 5 minutes.
IMPORTANT: the semiconductor versions are designed to detect di erent types of gases, as described under “Further
information”; however, the calibration procedure does not use one of these gases, rather the default gas. The complete table of
gases to be used for each type of product is shown under “Gases detected”.
It is therefore recommended to only use the speci c gas for each group to perform the calibration procedure.
The CO detectors do not require periodic calibration, but simply replacement of the sensor after a approximately 7 years.
Calibration can be performed every 12 months if wanting to guarantee greater accuracy of the measurement or if needing to
issue a new calibration certi cate. Below is a description of how to calibrate via the supervisor or via the app.
4.2 Calibration kit
The calibration kit is used to perform periodic calibration required for maintenance of the device. The gas cylinder and pressure
adapter to perform the calibration need to be procured separately.
Calibration kit with adapter, humidi er
The following section describes how to connect the calibration kit to the sensor in order to complete the cali-
bration procedure in the most suitable way.
Once the required gas cylinder is available, screw the pressure reducer onto
the cylinder, keeping the valve closed so that no gas is released.
Screw the highlighted part of the calibration kit onto the sensor on the
product being calibrated.
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