Vaisala DPT146 - Manual (Page 28)

User's Guide _______________________________________________________________________
26 ___________________________________________________________________ M211372EN-D
0801-069
Figure 13 Sampling Cells DMT242SC2 (left) and DMT242SC
(right)
where
1 = Male pipe welded connector Swagelok 1/4"
2 = G1/2"
3 = G1/4"
4 = G3/8"
DSC74 Sampling Cell with Quick
Connector and Leak Screw
DSC74 has been designed especially for compressed air lines. The
sampling cell contains an adjustable leak screw that allows keeping up
the pipeline pressure at the sensor. The leak screw is opened and closed
with a screwdriver. The leak screw should be half a turn open. This can
be verified by first closing the leak screw, then turning 1/2 turn to open
it. Then the air coming out will make a barely audible little hiss which
can be lightly felt when putting a hand in front of the air stream.
NOTE Do not open the leak screw more than 1/2 turn to avoid reducing the
pressure in the sampling cell.
DSC74 comes with a quick connector that fits to industry standard
compressed air line connectors (suitable for type D, Quick08, NIP08).
This allows for easy installation and detachment of the dewpoint
transmitter without having to shut down the process. Alternative ways to
connect are through the two different thread adapters (G3/8" to G1/2"
and G3/8" to G1/4" ISO) that are supplied with each DSC74 unit.