Design and function – WIKA TR12-M Benutzerhandbuch

Seite 14

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GB

4. Design and function

11419904.02 09/2013 GB/D

WIKA operating instructions models TR12, TC12 (Ex d)

14

Variant 3:

The thermometer is fitted to certified equipment (transmitter) with an ignition protection type

of “flameproof”. The thermometer is marked with II 2 G Ex d IIC Tx Gb and is designed for

use in zone 1 with a thermowell. For any potential usage at the partition to zone 0 with a

thermowell, the approvals and conditions of the relevant transmitter must be considered.

4.3 Neck tube versions

4.4 Housing- and connection heads

The dimensions of the housing- and connection heads are given in the respective data

sheet.

Legend:

Neck tube

Thread to the thermowell

Measuring insert

Thread to the connection head

A(U

2

) Insertion length

(tapered thread)

A(L

1

) Insertion length

(parallel thread)

NL

Nominal length

N(M

H

) Neck length

tapered

thread

parallel

thread

14013854.02

parallel

thread

tapered

thread

fabricated neck tube

(neck tube welded)

“nipple-union-nipple”

neck tube

tapered

thread

parallel thread with

counter nut

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