Wika TR25 Bedienungsanleitung PDF herunterladen (Seite 10)

14073045.01 10/2013 GB/D

WIKA operating instructions model TR25 (Ex i)

Pressure equipment directive

■

For instruments with nominal widths of ≤ DN 25 (1“), an EC conformity evaluation in

accordance with the Pressure Equipment Directive (PED) is not permitted.

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Instruments with nominal widths of ≤ DN 25 (1“), and thus without CE marking, should be

designed and manufactured in line with the applicable sound engineering practice (PED

article 3, chapter 3).

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For instruments > DN 25 (1“) and for the associated marking on the measuring instrument

or thermowell, WIKA conrms conformity with the 97/23/EC Pressure Equipment Directive in

accordance with the conformity assessment procedure, module H.

For further specications see WIKA data sheet TE 60.25 and the order documentation.

4. Design and function

4.1 Description

This resistance thermometer, through a wide variety of process connections, enables trouble-free

connection to many dierent processes.

3- or 4-wire platinum measurement resistances in accuracy classes A and B per DIN EN 60751

serve as sensors.

Analogue or digital transmitters built into the connection head are capable of making various

output signals available, for example 4 ... 20 mA, HART

protocol, FOUNDATION™ eldbus or

PROFIBUS

PA.

3. Specications / 4. Design and function

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Wika TR25 Bedienungsanleitung Seite 10