Wika TR10-J Manuel d'utilisateur télécharger pdf (Page 15)

WIKA operating instructions resistance thermometers, thermocouples

11208287.06 10/2013 GB/D/F/E

6. Commissioning, operation

6.2 Cable connections

The cable gland must be optimally sealed, to ensure that the required protection class is reached.

Requirements for meeting ingress protection

■

Only use cable glands within their indicated clamping range (cable diameter suitable for the

cable gland)

■

Do not use the lower clamping area with very soft cable types

■

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

CAUTION!

■

The protection class is not valid with armoured cables (stainless steel sheathed)

■

Seal should be checked for signs of brittleness and, if necessary, replaced

6.3 Parallel threads

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

connected to parallel threads (e.g. G ½, M20 x 1.5 ...), these threads must be secured using seals

which prevent 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).

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Wika TR10-J Manuel d'utilisateur Page 15

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