Wika MHC-1 Manuel d'utilisateur télécharger pdf (Page 15)

15WIKA operating instructions pressure transmitter, model MHC-1

14035467.01 08/2012 GB/D/F/E

6. Commissioning, operation

WARNING!

Prior to commissioning, the pressure transmitter must be subjected to a visual inspection.

Only use the pressure transmitter if it is in perfect condition with respect to safety.

6.1 Making the mechanical connection

■

The sealing faces at the instrument have to be undamaged and

clean.

■

When screwing the instrument in, the force required to do this must

not be applied through the casing, but only through the spanner ats

provided for this purpose and using a suitable tool.

The correct torque depends on the dimensions of the process

connection and the gasket used (form/material).

Maximum tightening torque

Process connection Tightening torque

G ½ A DIN 3852-E 60 Nm

M14 x 1.5 60 Nm

7/16-10 UNF-2A 20 Nm

¼ NPT 34 Nm

■

When screwing in, do not cross the threads.

■

For information on tapped holes and welding sockets, see Technical information IN 00.14 at

www.wika.com.

Spanner ats

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Wika MHC-1 Manuel d'utilisateur Page 15