WIKA MHC-1 - Manual (Page 15)

15 WIKA operating instructions pressure transmitter, model MHC-1
14035467.01 08/2012 GB/D/F/E
GB
6. Commissioning, operation
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 flats
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 flats