Wika TR33 Manuale Utente Scaricare il pdf (Pagina 17)

WIKA operating instructions model TR33

14073818.01 01/2014 GB/D

6. Commissioning, operation

WARNING!

Avoid putting any mechanical loading on the electrical

connections and on the enclosures. Connections must only

be opened once the instrument has been depressurised and

has cooled down.

Maximum permissible temperatures:

■

Without neck tube: -50 … +150 °C (-58 ... +302 °F)

■

With neck tube: -50 … +250 °C (-58 ... +482 °F)

■

At case with transmitter: 85 °C (185 °F)

6.1 Mounting

These resistance thermometers are designed for screw-tting directly

into the process. The insertion length, along with the ow velocity and

viscosity of the process media, may reduce the max. loading on the

thermowell.

The housing must be grounded against electromagnetic elds and

electrostatic discharge. It is not necessary to connect the housing

separately to the equipotential bonding system, provided that it has a

xed and secure contact to the metallic vessel, its components or pipes,

and that these are connected to the equipotential bonding system.

When there is a non-metallic contact with the vessel, or with its

structural components or piping, the instrument must be provided with

equipotential bonding.

WARNING!

Neither repairs nor structural modications are permitted,

and any would void the guarantee.

6. Commissioning, operation

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Wika TR33 Manuale Utente Pagina 17