COSA Xentaur Xentaur HDT - Manual (Page 22)

Section 3: Instrument
page 15
ing DPT.00.D.7042. refer to appendix E
3.3 Installation
3.3.1 Mechanical Installation
The HDT has two thread sizes (refer to Appendix C) for
mounting to the sample cavity (consult the sensor installa-
tion section) where the dewpoint will be measured. Various
adapters are available for direct connection into existing
system openings. Ask your representative for a Sample
Cell, if you do not have the ability to provide an appropriate
sample cavity mounting. If the ¾”x16 thread is used then
the HDT will seal against the wall of the sample cell with
the provided Viton A O-ring. If the 14mm x 1.25 spark plug
thread is used then an additional Viton gasket must be
installed to provide the proper seal. Ask your representative
for this gasket, it is available free of charge. The HDT is
light enough such that either thread will mechanically sup-
port the whole instrument. To prevent any leaks, tighten the
HDT into the sample cavity, with a
1
1
/
4
” wrench, 1/8 turn
past finger-tight to assure metal-to-metal contact, do not
exceed 15 foot-pounds.
The sensor can be removed from the HDT by unscrewing it.
Make sure that the sensor is securely fastened to the HDT
(the tension washer should be compressed), so that it does
not come loose during use, do not overtighten because the
sintered material will break.
3.3.2 Electrical Installation
The HDT will operate properly with 5VDC minimum to
28VDC maximum at its input, if this voltage is exceeded the
internal fuse may open, this fuse will self reset after a