Eurotherm 3116 PID Podręcznik Użytkownika Pobierz pdf (Strona 12)

3116 User Guide Part No. HA028005ENG Issue 2.0 May 04

ENG

4. Installation Safety Requirements

Safety Symbols

Various symbols may be used on the controller. They have the following meaning:

Personnel

Installation must only be carried out by suitably qualified personnel

Enclosure of Live Parts

To prevent hands or metal tools touching parts that may be electrically live, the controller must be enclosed in an enclosure.

Caution: Live sensors

The controller is designed to operate with the temperature sensor connected directly to an electrical heating element. However

you must ensure that service personnel do not touch connections to these inputs while they are live. With a live sensor, all

cables, connectors and switches for connecting the sensor must be mains rated.

Wiring

It is important to connect the controller in accordance with the wiring data given in this guide. Take particular care not to connect

AC supplies to the low voltage sensor input or other low level inputs and outputs. Only use copper conductors for connections

(except thermocouple inputs) and ensure that the wiring of installations comply with all local wiring regulations. For example in

the UK use the latest version of the IEE wiring regulations, (BS7671). In the USA use NEC Class 1 wiring methods.

Power Isolation

The installation must include a power isolating switch or circuit breaker. This device should be in close proximity to the

controller, within easy reach of the operator and marked as the disconnecting device for the instrument.

Caution, (refer to

accompanying documents)

Equipment protected throughout

by DOUBLE INSULATION

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Eurotherm 3116 PID Podręcznik Użytkownika Strona 12