Tork GA 21, Руководство пользователя

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NOTE
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GA21 gas alarm devices are offered to the user in the form of relay and non-relay types.
Offset, Zero, Span settings are adjusted with the trimpots on the electronic board, and output
signal selection can be made with the sliding switches.
OFFSET Trimpot; It is the alarm level adjustment trimpot. With this trimpot, the user can set the
alarm limit level of the device in %LEL.
SPAN Trimpot; It is used to adjust the upper limit level of the 4-20 mA signal when needed.
ZERO Trimpot; It is used to set the lower limit level of the 4-20 mA signal.
SLIDING Switches; It is used to select the output signal and the type of output signal as mA or
voltage.
When the power is cut off, the device will turn off. Since similar systems such
as the gas shut-off valve connected to the device output will close it, it will
stop the gas passage. When the power comes on, the device will turn on and the device will
continue to work normally. The user must activate the closed valve and similar mechanical
systems.
4.2. Power cut
4.3. Making the settings
• Make sure the device is intact before performing the Device Setup.
• Review the cables and ports for the device.
• Do not mount in a way that narrows the user's work area.
• In case of emergency, install it in such a way that it is easily accessible and easy to intervene.
• The lower explosion limit of % lel (APS) differs according to the type of gas used. Have a measuring
device available.
• Set the alarm level of the device with the OFFSET Trimpot.
• Identify areas that may pose a hazard as a result of gas leakage.
• Determine the places where the device will be mounted.
• Follow the instructions when performing the Installation/Assembly process.
4.4. Installation/Assembly