Wika TR12-M Manuel d'utilisateur télécharger pdf (Page 12)

14064370.01 08/2013 GB/D

WIKA operating instructions models TR12, TC1212

4. Design and function

4.1 Description

The model TR12-B (resistance thermometer) and model TC12-B (thermocouple) electrical

thermometers consist of a module (TR12-M, TC12-M) which is built into a certied Ex-d

housing. The module is made up of a spring-loaded measuring insert (TR12-A, TC12-A)

built into a neck tube. The measuring insert (TR12-A, TC12-A) is replaceable.

The active measuring component of the measuring insert is manufactured from a welded

tube or from mineral-insulated cable, optionally in combination with ceramic-insulated

thermocouple wires. The sensor is embedded in ceramic powder, heat-resistant potting

compound, cement compound or thermally conductive paste.

If the temperature sensor is designed as a grounded thermocouple, the thermocouple is

joined directly to the sheath. Designs with a diameter smaller than 3 mm and with grounded

thermocouples should be considered as galvanically connected with earth potential.

The connection side of the measuring insert consists of a transition sleeve with connected

connection wires.

CAUTION!

Thermometers of this model range must be installed with a thermowell. The

design of the thermowell can be selected as desired, but the operational

process data (temperature, pressure, density and ow rate) must be taken into

account.

Possible sensor measuring ranges:

Model TR12: -200 ... +600 °C

Model TC12: -40 ... +1,200 °C

The following mounting and operating information has been compiled with care. However, it

is not possible to consider all potential usage cases.

4. Design and function

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 47 48

Pas de commentaire

Wika TR12-M Manuel d'utilisateur Page 12