WIKA TR10-C - Handbuch (Seite 21)

WIKA operating instructions resistance thermometers and thermocouples, Ex n
14106886.01 06/2014 GB/D
21
GB
6.6 Tapered threads
Connections with tapered threads are self-sealing and normally must not be sealed. It should
be checked whether it may be necessary to seal them additionally with PTFE tape or hemp. The
threads must be lubricated with a suitable lubricant before fitting.
Tighten the threads by hand when carrying out the final assembly on the plant. This will
correspond to the delivery status of the premounted components. The final tightening and sealing
must be made with a spanner (1.5 to 3 rotations).
6.7 Tightening torques
6.7.1 Tightening torques at the transmitter (model T32.xx.0NI)
Tightening torques
in Nm
Min. wire cross-section
in mm²
Max. wire cross-section
in mm²
0.4 0.14 2.5
6.7.2 Tightening torques at the ceramic terminal
Tightening torques
in Nm
Min. wire cross-section
in mm²
Max. wire cross-section
in mm²
2.5 0.14 2.5
6.7.3 Tightening torques between cable gland and connection head
■ Junction between cable gland and connection head
Thread Tightening torques in Nm
M20 x 1.5 12
½ NPT 30
■ Junction between cable and cable gland
Screw the male nut tightly into the adapter (use appropriate tools!)
6.7.4 Tightening torques between connection head and neck tube
Thread Tightening torques in Nm
Connection head material
Aluminium
Stainless steel
½ NPT 32 35
¾ NPT 36 40
M24 x 1.5 with male nut 1) 27 30
1) Only for versions with non-divisible neck tube
6. Commissioning, operation