3 general description, 1 power supply, 2 measured parameters – ROTRONIC MP400H User Manual
Page 5: 3 calculated parameters, General description, Power supply, Measured parameters, Calculated parameters, E-m-hm-v1_10, 3general description
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 5 of 19
Document title
© 2009; Rotronic AG E-M-HM-V1_10
3
General description
3.1 Power supply
15 to 24 VDC
With both output circuits closed, the maximum current consumption is 50 mA.
Depending on the type of analog output signal, the minimum supply voltage can be reduced as follows:
0…1 V outputs: 5 VDC minimum
0…5 V outputs: 10 VDC minimum
3.2 Measured parameters
The HygroClip HC2-S3 probe used with the HygroMet MP measures relative humidity with a ROTRONIC
Hygromer
®
IN1 capacitive sensor and temperature with a Pt100 RTD.
3.3 Calculated parameters
Using the ROTRONIC HW4 software, the HygroMet MP can be configured by the user to calculate one of the
following parameters:
o
Dew point (Dp) above and below freezing
o
Frost point (Fp) below freezing and dew point above freezing
o
Wet bulb temperature (Tw)
o
Enthalpy (H)
o
Vapor concentration (Dv)
o
Specific humidity (Q)
o
Mixing ratio by weight (R)
o
Vapor concentration at saturation (Dvs)
o
Vapor partial pressure (E)
o
Vapor saturation pressure (Ew)
Note: some of the above parameters depend on the value of the barometric pressure. Using the ROTRONIC
HW4 software, a fixed barometric pressure value can be specified. For instructions see the following HW4
manual: E-M-HW4v2-F2-014