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Commissioning, operation – WIKA TR75 User Manual

Page 17

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11325232.04 01/2014 GB/D/F/E

WIKA operating instructions DiwiTherm

®

, model TR75

17

GB

Typical mounting situation with contact bulb

Mounting on pipes

The geometry of the contact bulb has been

designed for pipes with external diameters

between 20 and 160 mm. For fixing the

contact bulb to the pipe, pipe clamps are

sufficient. The contact bulb should have

direct metallic contact with the measuring

point and have firm contact with the surface

of the pipe. Where temperatures under

200 °C are expected, a heat conductive

paste can be used to optimise the heat

transmission between contact bulb and pipe.

Insulation must be applied at the mounting

point to avoid error due to heat loss. This

insulation must have sufficient temperature

resistance and is not included in the scope of delivery.

Measuring

insert

Thermowell

Pipe clamp mounting

Lagging *

* Lagging mandatory!

6. Commissioning, operation

DiwiTherms

®

must only be operated with an additional thermowell.

Exception: Axial cable outlet (for panel mounting) or version with contact bulb.
Typical mounting situation with thermowell

6. Commissioning, operation