ROTRONIC MP400H - Manual (Page 16)

E-M-HM-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroMet MP Humidity Temperature
Meteorological Probe: User Guide Instruction Manual
Document Type
Page 16 of 19
Document title
© 2009; Rotronic AG E-M-HM-V1_10
10 Technical data
10.1 Specifications
General HM 3-wire
Device type Humidity temperature probe with analog output signals and RS485 interface
Circuit type 3-wire
Power supply and connections HM 3-wire
Supply voltage
15…24 VDC
0…1 V outputs: 5…24 VDC
0…5 V outputs: 10…24 VDC
Nominal current consumption < 50 mA
Electrical connections 3 m cable with tinned ends
Polarity protection Protective diode on V+
Humidity and temperature
measurement
See document E-M-HC2 Probes > Specifications
Calculated parameters
HM 3-wire
Psychrometric calculations
Dew point (Dp) above and below freezing
Frost point (Fp) below freezing and dew point above freezing
Wet bulb temperature (Tw)
Enthalpy (H)
Vapor concentration (Dv)
Specific humidity (Q)
Mixing ratio by weight (R)
Vapor concentration at saturation (Dvs)
Vapor partial pressure (E)
Vapor saturation pressure (Ew)
Start-up time and data refresh rate
HM 3-wire
Start-up time 3 s (typical)
Data refresh rate 1 s (typical)