Vaisala DRYCAP DMT345, User Manual, Page: 20 / 157

USER'S GUIDE____________________________________________________________________
20 __________________________________________________________________ M210762EN-D
Quantity Abbreviation Metric Unit Non Metric Unit
Temperature T T ºC ºF
Table 4 Optional Output Quantities and Their Abbreviations
for Vaisala DRYCAP
®
Dewpoint Transmitter DMT345
Quantity Abbreviation Metric Unit Non Metric Unit
Parts per million H2O ppm
v
/ ppm
w
ppm
v
/ ppm
w
Absolute humidity (a) A g/m
3
gr/ft
3
Absolute humidity in standard pressure and
temperature (NTP) ANTP g/m
3
gr/ft
3
Wet bulb temperature (T
w
) TW ºC ºF
Water vapor pressure (P
w
) PW hPa lb/in
2
Water vapor saturation pressure (P
ws
) PWS hPa lb/in
2
Enthalpy (h) H kJ/kg Btu/lb
Difference of T and T
d/f
(
∆
T) DT ºC ºF
Table 5 Output Quantities and Their Abbreviations for Vaisala
DRYCAP
®
Dewpoint Transmitter DMT346
Quantity Abbreviation Metric Unit Non Metric Unit
Dewpoint temperature (T
d/f
) TDF ºC ºF
Mixing ratio (x) X g/kg gr/lb
Sensor saturation rate SSR % -
Sensor temperature TS ºC ºF
Basic Features and Options
DMT345/346 has the following basic features and options:
- Dewpoint measurement with AutoCal and sensor purge features.
- Sensor warming in high humidities.
- Two analog outputs and a serial interface, optional third analog
output.
- Installation accessories
- DMT345: mounting flange,
- DMT346: cooling set for high temperature applications.
- User friendly multilingual display option.
- Different sensor protection options and probe cable lengths 2 m, 5 m
or 10 m.
- USB connectivity for service connections via the optional
USB-RJ45 cable
- Optional modules:
- galvanic isolation for outputs