Vaisala HUMICAP HMT330 SERIES Guida Utente Pagina 44

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User's Guide ______________________________________________________________________
44 __________________________________________________________________ M210566EN-H
0506-029
Figure 25 HMT344 Probe
The following numbers refer to Figure 25:
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.
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