Product information Wireless data loggers
41
Wind speed – Characteristics of the HD54.3 cup anemometer
Sensor
Passive 3-cup anemometer
Measuring range
1…65 m/s
Resolution (of the instrument)
0.1 m/s
Accuracy
± 0.14 m/s @ 10 m/s installed on a flat terrain site
Offset
0.35 m/s
Gain
0.765 m s
-1
/Hz
Distance constant (63% recovery)
2.55 m @ 5 m/s / 2.56 m @ 10 m/s (ASTM D 5096-02)
Wind direction – Characteristics of the HD54.D vane
Sensor
Continuous rotation potentiometric vane
Measuring range
0…359°
Resolution (of the instrument)
1°
Accuracy
< 1%
Dead band
4° typical, 8° max.
Threshold
1 m/s
Rainfall quantity
Sensor
Tipping bucket with NC or NO configurable contact
Resolution (of the instrument)
Configurable 0.1 – 0.2 – 0.5 mm/tipping
Other characteristics not reported depends on the sensor connected, please refer to the data sheet of the chosen rain gauge.
Level
Sensor
Sensor of pressure relative to the atmosphere
Pressure measuring range
0…1 bar
Level measuring range
Depends on the fluid density (configurable via software)
For water: 0…10 m approx.
Resolution (of the instrument)
1 hPa / 0,01 m (for water)
Accuracy
± 0.8% f.s. @ 25 °C
Solar radiation
Sensor
Thermopile
Measuring range
0…2000 W/m
2
Resolution (of the instrument)
1 W/m
2
Sensitivity
Configurable in mV/(kW
m
-2
)
Other characteristics not reported depends on the sensor connected, please refer to the data sheet of the chosen pyranometer. The
instrument also displays the mV signal of the pyranometer.
Illuminance
Sensor
Photodiode
Measuring range
I
: 0…20,000 lux
I2
: 0…200,000 lux
Resolution (of the instrument)
I
: 1 lux (0…2,000 lux), 10 lux (>2,000 lux)
I2
: 10 lux (0…20,000 lux), 100 lux (>20,000 lux)
Spectral range
According to photopic curve V(
l
)
Spectral response
See graph 1
α (temperature coefficient) f
6
(T)
<0.05% K
Calibration uncertainty
<4%
f’1 (according to photopic curve V(
l
))
<6%
f
2
(response according to the cosine law)
<3%
f
3
(linearity)
<1%
f
4
(instrument reading error)
<0.5%
f
5
(fatigue)
<0.5%
Class
B
Drift after 1 year
<1%
Operating temperature
0…50
°
C
Reference Standard
CIE n°69 – UNI 11142
