Vaisala HMT330 - Manual (Page 46)

User's Guide _______________________________________________________________________
44 ___________________________________________________________________ M210566EN-K
0506-029
Figure 25 HMT344 Probe
The following numbers refer to Figure 25 above:
1 = Tightening cone
2 = Nut
3 = Fitting screw, M22x1.5 or NPT 1/2"
4 = Sealing washer
5 = Probe; Ø12 mm
5. Tighten the nut a further 30º (1/12) turn or if you have a torque
wrench tighten it with a torque of 80 ± 10 Nm (60 ± 7 ft-lbs).
0503-034
Figure 26 Tightening the Nut
NOTE When re-tightening the nut after detachment the nut must be tightened
without increased effort.
6. Clean and grease the tightening cone of the fitting screw after every
tenth detachment. Change the sealing washer every time the fitting
screw is detached. Use high-vacuum grease (for example Dow
Corning) or similar grease.