USER'S GUIDE____________________________________________________________________
22 _______________________________________________________________ M210619EN-C
HMT313 for General Use
The HMT313 is a small size (d = 12mm) general-purpose probe
suitable for ducts and channels with the installation kit available from
Vaisala.
The HMT313 provides for two measuring range options. The first
probe version is equipped with a flexible cable and can be used when
measuring in environments up to 80 ºC. The second version is suitable
for measuring in environments up to 120 ºC.
See Appendix A on page 80 for the following probe installation kits
for HMT313 and installation examples:
- Duct mounting kit
- Cable
gland
HMT314 for Pressurized Spaces
HMT314 probe is for humidity measurements in pressurized rooms
and industrial processes. The probe is provided with a nut, a fitting
screw and a sealing washer. Keep the fitting screw and nut in place on
the body of the probe during handling to prevent damage to the highly
polished surface of the probe. Follow the instructions below to
achieve a leak-tight assembly:
1.
Remove the fitting screw from the nut and the probe.
2.
Attach the fitting screw to the chamber wall with a sealing
washer. Tighten the fitting screw into the threaded sleeve with a
torque spanner. The tightening torque is 150 ± 10 Nm
(110 ± 7 ft-lbs).
3.
Insert the body of the probe into the fitting screw and attach the
nut manually to the fitting screw so that the connection feels
tight.
4.
Mark both the fitting screw and the nut hex.
