Wika TR10-B Manual do Utilizador descarregar pdf (Página 14)

3132465.01 07/2011 GB/D

WIKA operating instructions resistance thermometers per EN 14597

■

Only use circular cross-section cables (if necessary, slightly oval in cross-section)

■

Do not twist the cable

■

Repeated opening/closing is possible; however only if necessary, as it might have a

detrimental eect on the protection class

■

For cable with a pronounced cold-ow behaviour the screw connection must be fully

tightened

6.3 Parallel threads

If the thermometer connecting head, neck tube, thermowell or process connection are

connected to parallel threads (e.g. G ½, M20 x 1,5 ...), these threads must be secured by

means of seals preventing liquids from penetrating into the thermometer.

As standard, WIKA uses copper prole seals for the connection between the neck tube

and the thermowell, and at paper seals for the connection of the connection head and the

extension neck or thermowell.

If the thermometer and the thermowell are already connected, the seals will already be

mounted. The plant operator must check whether the seals are suitable for the operating

conditions and must replace them, if necessary, with suitable seals.

For thermometers without a thermowell, and/or where these are delivered separately, the

seals are not included and must be ordered separately.

Tighten the threads by hand when carrying out the nal assembly on the plant. This will

correspond to the delivery status of the premounted components. The nal tightening torque

should be applied using a spanner (half rotation).

The seals must be replaced after dismantling!

The seals can be ordered from WIKA, indicating the WIKA order number and/or

the designation (see table).

WIKA

Order No.

Description Suitable for threads

1605933 D15 x D21 x 1 -NP-Univ M24 x 1.5

0479632 per DIN 7603 D16.2 x D21.9 x 1.5 -2.0060 M24 x 1.5

(Head neck tube/thermowell)

Legend:

NP-Univ = Novapress universal

(2.0060

E-Cu57 per DIN 1708)

∧

6. Commissioning, operation

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Wika TR10-B Manual do Utilizador Página 14