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HMW40/50 Wall and Duct Mount Transmitters for HVAC Applications

HMD4050Download PDF

Description

Vaisala INTERCAP® Humidity and Temperatur e Transmtters HMD/W40/50 are competitively priced and require no routine maintenance – a smart choice for your HVAC/EMC applications.

The two and three-wire Vaisala
INTERCAP® Humidity and Temperature Transmitters HMD/W40 and HMD/W50 are designed for use in energy management systems in buildings. They combine excellent stability with easy installation and reliable operation. The HMD40/50 are for duct installations and the HMW40/ 50 for wall installations.

Low maintenance costs
The HMD40/50 humidity transmitters use Vaisala INTERCAP® Sensor - the world’s rst interchangeable capacitive humidity sensor. The transmitters require no recalibration if the sensor is changed. This means great savings in overall maintenance costs. The sensor is also insensitive to dust as well as most chemicals.

Measures both humidity and temperature
The 40/50 series is available as humidity and temperature (Y), or humidity only (U) transmitters. The transmitters measure humidity with a ±3 %RH accuracy and a ±1 %RH stability per year.

Selectable functions
(HMD/W50) The HMD/W50 transmitters feature selectable output signals of 0 to 1 V and 0 to 10 V. They can be powered by either AC or DC voltage.

Features and Benefits

  • Specially designed for building energy management systems.

  • 10...90 %RH measurement.

  • -10...+60 °C (+14…+140 °F) operating range for duct units.

  • -5...+55 °C (+23…+131 °F) operating range for wall units.

  • 4...20 mA 2-wire output (HMD/W40).

  • Selectable voltage 3-wire output (HMD/W50).

  • Combines excellent stability with easy installation and reliable operation.

  • No recalibration.

  • Fully interchangeable Vaisala INTERCAP ® Sensor is easy to replace.

  • Low cost.

Wiring

Technical Data

Relative humidity
Measurement range
(for which accuracy is specied) 10...90 %RH
Operating range
HMD40/50 0...100 %RH
HMW40/50 0...90 %RH
Accuracy at +20 °C better than ±3 %RH
Stability ±2 %RH over 2 years
Temperature dependence <±1.5 %RH from -10...+60 °C
(+14…140 °F)
Sensor INTERCAP® Sensor,
part no. 15778HM

Temperature (40Y and 50Y)
Measurement range
HMD40/50 -10...+60 °C (+14…+140 °F)
HMW40/50 -5...+55 °C (+23…+131 °F)
Total accuracy at +25 °C ±0.3 °C (±0.54 °F)
Temperature dependence 0.01 °C/°C (.01 °F/°F)
Sensor Pt 1000 IEC 751 class B

Technical Data

Output signal for relative humidity
(equals 0...100 %RH)

HMD/W40 4...20 mA
HMD/W50 0...1 V & 0...10 V
Output signal for temperature  
HMD/W40 4...20 mA
HMW50 0...1 V & 0...10 V/td>
HMD50 0...10 V/td>
HMD40Y, HMD50Y equals -40...+60 °C (-40..140 °F)
HMW40Y, HMW50Y equals -5...+55 °C (+23..131 °F)
Load resistance >20 kohm
Power supply  
HMD/W40 10...28 VDC/td>
HMD/W50 for 0...1 V output:
12...35 VDC/12...24
VAC for 0...10 V output:
15...35 VDC/15...24 VAC
Current consumption  
HMD/W40 4 mA minimum
HMD/W50 6 mA typical
Operating temperature range  
HMD40/50 -10...+60 °C (+14…+140 °F)
HMW40/50 -5...+55 °C (+23…+131 °F)<
Storage temperature range -40..+60 °C(-40..+140 °F)
Operating humidity range  
HMD40/50 0...100 %RH
HMW40/50 0...90 %RH
Sensor protection  
standard membrane lter part no. 17039HM
option plastic grid, part no. 17038
Housing Material ABS Plastic
Housing classication (HMD40/50) IP65 (NEMA 4)

Complies with EMC standard EN61326-1:1997 + Am 1:1998; Generic Environment.

Dimensions