Vaisala HMT330 - Manual (Page 50)

User's Guide _______________________________________________________________________
48 ___________________________________________________________________ M210566EN-K
Tightening the Clasp Nut
1. Adjust the probe to a suitable depth according to the type of
installation.
2. Tighten the clasp nut first manually.
3. Mark the fitting screw and the clasp nut.
4. Tighten the nut a further 50 -60º (ca. 1/6 turn) with a wrench. If
you have suitable torque wrench, tighten the nut to max 45 ± 5 Nm
(33 ± 4 ft-lbs).
0505-276
Figure 30 Tightening the Clasp Nut
The following numbers refer to Figure 30 above:
1 = Probe
2 = Clasp nut
3 = Fitting screw
4 = Pen
CAUTION Take care not to damage the probe body. A damaged body makes the
probe less tight and may prevent it from going through the clasp nut.
CAUTION In pressurized processes it is essential to tighten the supporting nuts and
screws very carefully to prevent loosening of the probe by the action of
pressure.
NOTE Take care not to over tighten the clasp nut to avoid difficulties when
opening it.