Vaisala PTU300 - Manual (Page 24)

User's Guide _______________________________________________________________________
22 ___________________________________________________________________ M210796EN-G
Table 4 Basic Quantities Measured by PTU300
Quantity Abbreviation Metric Unit Non-Metric Unit
Pressure P See Table 6 on page 22.
Relative Humidity
1)
RH %RH %RH
Temperature T ºC ºF
1) Relative humidity not included on the PTU30T model
Table 5 Optional Quantities Measured by PTU300
Quantity Abbreviation Metric Unit Non-Metric Unit
Dewpoint /Frostpoint Temperature (T
d/f
) TDF ºC ºF
Dewpoint Temperature (T
d
) TD ºC ºF
Absolute humidity (a) A g/m
3
gr/ft
3
Mixing ratio (x) X g/kg gr/lb
Wetbulb temperature (T
w
) TW ºC ºF
Humid air volume/ dry air volume
(by volume or by weight) (H
2
O)
H2O ppmv/ppm
w
ppm
v
/ppm
w
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 6 Optional Pressure Quantities Measured by PTU300
Quantity Abbreviation Units Available
Pressure trend and tendency P
3h
hPa, psia, inHg, torr, bara, barg,
psig, mbar, mmHg, kPa, Pa,
mmH
2
O, inH
2
O
Pressure (measures average pressure
from P
1
and P
2
if both are connected)
P
Pressure from transducer 1 or 2 P
1
and P
2
QNH pressure QNH
QFE pressure QFE
Height Corrected Pressure HCP