Wika TR75 Manual do Utilizador descarregar pdf (Página 11)

11325232.04 01/2014 GB/D/F/E

WIKA operating instructions DiwiTherm

, model TR75 11

4.1.2 DiwiTherm

for mounting in a thermowell

Sensor

Material: stainless steel

The sensor is made from vibration-resistant, sheathed cable (MI cable).

The sensor diameter should be approx. 1 mm smaller than the bore diameter of the

thermowell. Gaps of more than 0.5 mm between thermowell and the sensor will have a

negative eect on the heat transfer, and they will result in unfavourable response behaviour

of the thermometer.

When tting the measuring insert into a thermowell, it is very important to determine the

correct insertion length (= thermowell length for bottom thicknesses of ≤ 5.5 mm). In order to

ensure that the sensor is rmly pressed down onto the bottom of the thermowell, the sensor

must be spring-loaded (spring travel: max 10 mm).

Process connection (standard process connection)

Material: stainless steel

Threaded connection: G ½ B

M14 x 1.5

M18 x 1.5

½ NPT

Union nut: G ½ B

Male nut: G ½ B

Neck tube

Material: stainless steel

Neck tube diameter: 12 mm

Standard neck length: 150 mm

others on request

(minimum neck length: 30 mm)

Sensor lengths

Sensor Ø in mm Standard insertion lengths A (l

) in mm

3 110 140 145 170 200 205 230 245 260 294 305 345 350 395 410 445 545

6 - - - 170 200 205 230 245 260 295 305 345 350 395 410 445 545

8 - - - - 200 205 230 245 260 295 305 345 350 395 410 445 545

Special lengths are possible.

4. Design and function

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 91 92

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Wika TR75 Manual do Utilizador Página 11