Safety
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Safety Symbols - Various symbols are used on the instrument. They have the following meaning:
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Caution (refer to the accompanying documents)
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Grounding of the temperature sensor shield - In some installations, it is common practice to replace the temperature sensor while the controller is still powered up. Under these conditions, as additional protection against electric shock, it is recommended that the shield of the temperature sensor be grounded. Do not rely on grounding through the framework of the machine.
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Installation requirements for EMC - To ensure compliance with the European EMC directive, certain installation precautions are necessary. When using relay or triac outputs, it may be necessary to fit a filter suitable for suppressing the emissions. The filter requirements will depend on the type of load. For typical applications, it is recommended to use Schaffner FN321 or FN612.
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Routing of wires - The wiring for the low voltage DC, and particularly the sensor, input should be routed away from high-current power cables. This will minimize the pick-up of electrical noise. When it is impractical to do this, use shielded cables with the shield grounded at one end.