
User's Guide _______________________________________________________________________
16 ___________________________________________________________________ M210762EN-A
For quantities measured by DMT345, see Table 3 below. For the
optional calculated quantities measured by DMT345, see Table 4
below.
For quantities measured and calculated by DMT36, see Table 5 below.
Table 3 Output Quantities and Their Abbreviations for
Vaisala DRYCAP
®
Dewpoint Transmitter DMT345
Quantity Abbreviation Metric Unit Non Metric Unit
Dewpoint/frost point temperature (T
d/f
) TDF ºC ºF
Mixing ratio (x) X g/kg gr/lb
Relative humidity RH RH %RH %RH
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
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
1) Use these parameters only if you need dewpoint over water below 0 ºC/32 ºF and not over
ice (industry standard)
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
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