ROTRONIC HM4 - Manual (Page 33)

E-M-HM4-V0_08
ROTRONIC AG
Bassersdorf, Switzerland
Document Code Unit
HM4 Humidity and Temperature Probe with
Heated Sensor
Instruction Manual
Document Type
Page 33 of 41
Document Title
© 2014; ROTRONIC AG E-M-HM4-V0_08
10 Technical Data
General
Device type Humidity / Temperature probe
Circuit type 3-wire
Power Supply
(V+)
15…24 VDC (for all output variants and functions)
5…24 VDC (only 0…1 V analog output and sensor heating available)
Current consumption
<35 mA @ V+= 5 VDC (without sensor heating)
<55 mA @ V+= 5 VDC (with sensor heating)
<20 mA @ V+= 24 VDC (without sensor heating)
<30 mA @ V+ = 24 VDC (with sensor heating)
Electrical connection Tuchel connector (7-pin) / Open ends
Polarity protection Protective diode
Humidity Measurement
Sensor SMD Thermo
Measurement range 0…100 %RH
Measuring accuracy @ 23 °C ±1.5 %RH (sensor heating switched on)
Extended measuring accuracy
±2.5 %RH @ 80 °C (sensor heating switched on)
±2.5 %RH @ 60 °C (sensor heating switched on)
±2.0 %RH @ 40 °C (sensor heating switched on)
±2.0 %RH @ 0 °C (sensor heating switched on)
±3.0 %RH @ -20 °C (sensor heating switched on)
±4.0 %RH @ -40 °C (sensor heating switched on)
Long-term stability <1 %RH/year
Response time Typically: 25 s (wind velocity at sensor: 1 m/s)
DRAFT