Vaisala HMDW80 - Manual (Page 12)

User's Guide _______________________________________________________________________
10 ___________________________________________________________________ M211510EN-C
HMDW80 Series Transmitter Models
Table 3 below lists the most important differences between the HMDW80
series transmitter models. For technical specifications, see Chapter 6, Technical
Data, on page 45.
Table 3 HMDW80 Series Transmitter Models
Model Type Outputs Display IP Rating Output Parameters
HMD82 Duct 2 × 4 ... 20 mA No IP65 T, RH, Td, h, Tw
HMD82D Duct 2 × 4 ... 20 mA Yes IP65 T, RH, Td, h, Tw
TMD82 Duct 1 × 4 ... 20 mA No IP65 T
HMD83 Duct 2 × 0 ... 10 V No IP65 T, RH, Td, h, Tw
HMD83D Duct 2 × 0 ... 10 V Yes IP65 T, RH, Td, h, Tw
TMD83 Duct 1 × 0 ... 10 V No IP65 T
HMW82 Wall 2 × 4 ... 20 mA No IP30 T, RH
TMW82 Wall 1 × 4 ... 20 mA No IP30 T
HMW83 Wall 2 × 0 ... 10 V No IP30 T, RH
TMW83 Wall 1 × 0 ... 10 V No IP30 T
HMW88 Wall 2 × 4 ... 20 mA No IP65 T, RH, Td, h, Tw
HMW88D Wall 2 × 4 ... 20 mA Yes IP65 T, RH, Td, h, Tw
HMW89 Wall 2 × 0 ... 10 V No IP65 T, RH, Td, h, Tw
HMW89D Wall 2 × 0 ... 10 V Yes IP65 T, RH, Td, h, Tw
HMS82 Outdoor 2 × 4 ... 20 mA No IP65 T, RH, Td, h, Tw
HMS83 Outdoor 2 × 0 ... 10 V No IP65 T, RH, Td, h, Tw
Output Parameters Explained
Table 4 Parameters Supported by HMDW80 Series
Parameter Symbol Unit(s) Description
Temperature T °C
°F
Temperature in Celsius or Fahrenheit scale.
Relative
humidity
RH % Ratio of the partial pressure of water vapor in
the air to the saturation vapor pressure of air
at the current temperature.
Dewpoint Td °C
°F
Temperature at which the water vapor in the air
will condense into water at the current pressure.
When the dewpoint is below 0 °C, the
transmitter outputs frostpoint (Tf) instead of
dewpoint.
Enthalpy h kJ/kg
BTU/lb
Sum of the internal energy of a thermodynamic
system.
Wet bulb
temperature
Tw °C
°F
The minimum temperature that can be reached
by evaporative cooling in the current conditions.