Burkert 8400 Manuel D'instructions page 4

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Temperature Controller 8400
1 SAFETY RECOMMENDATIONS
Always respect the safety instructions marked by the symbol
opposite as well as those included in the manual.
1.1 Utilisation
The 8400 or 8400 Extended controller has only been designed to
measure the temperature of a liquid or a gas.
There will be no manufacturer warranty for damages caused by
unexpected handling or wrong usage of the device. The warranty on the
device becomes invalid if any modification or change is made on the
device.
The device should only be installed and repaired by specialist
staff.
The user is not allowed to work on the cables inside the housing.
If any difficulties may occur with the product during installation,
please contact your nearest Bürkert sales office for assistance.