COSA Xentaur Xentaur LPDT - Manual (Page 27)

LPDT User’s Manual
page 20
3.4.4.1 Viewing Dewpoint Mode
In this mode the user can view the dewpoint, this is indi-
cated by the presence of the ‘DEWPOINT’ legend on the
lower left of the display. The available engineering units in
which to view the moisture content are °C, °F, PPM, LBS
and G/M 3 ; the UP and DOWN buttons scroll back and forth
through these units in respective order. The °C and °F are
dewpoint readings. The PPM is parts per million by volume
computed at the sensor pressure (more about pressure in
appendix F). The LBS and G/M
3
are pounds of water per
million standard cubic feet and grams of water per standard
cubic meters, both in Natural Gas, they are computed
according to data derived by IGT Research Bulletin 8, tak-
ing into account sensor pressure.
Note that the analog output is linear to the selected engi-
neering units, therefore be mindful that while scrolling
through various units the analog output may change even
though the measured dewpoint is stable.
The PSI legend flashes at the bottom of the display, when
there is pressure correction in the computation of the dis-
played values, refer to appendix F.
3.4.4.2 Viewing Temperature at the Sensor
In this mode the user can view the thermodynamic tempera-
ture at the dewpoint sensor inside the sampling chamber,
this is indicated by the flashing ‘TEMP’ legend on the lower
left of the display. The available units in which to view the
temperature are °C and °F. The UP and DOWN buttons
switch back and forth between these units.
Pressing the MODE button changes to the Start Calibration
Mode.