User Manual
3
Figure 2-2. The CNR4 net radiometer with CNF 4 heater/ventilator unit, top view.
2.1 CNR4 Specifications
Sensor sensitivities:
Four probes have unique sensitivity
values. Please refer to the calibration
sheets or label on the bottom of the
sensor for the sensitivity values.
Operating temperature:
-40 to +80°C (-40 to 176°F)
Operating humidity:
0 to 100 % RH
Bubble level sensitivity:
< 0.5°
Sensor type:
Thermopile
Receiver paint:
Carbon Black
Desiccant:
Silica gel (replaceable)
Housing material:
Anodized aluminium body
Shock/vibration:
IEC 721-3-2-2m2
CE:
Complies with EC guideline
89/336/EEC 73/23/EEC
Environmental protection:
IP 67
Requirements for data acquisition
Radiation components:
4 differential or 4 single-ended
analogue channels
Thermistor:
1 voltage excitation and 1 single-
ended analogue channel
Pt-100 temperature:
1 current excitation and 1 differential
analogue channel.
Cable length:
User defined
Weight
Sensor:
0.85 kg (1.89 lbs) without cables
Heater/Ventilator, CNF4
(optional):
0.50 kg (1.11 lbs) without cables
Mounting rod:
34.7 cm (13.67 ”) length
1.6 cm (0.63 ”) diameter
CNR4 Package includes:
CNR4 sensor
Mounting rod (1 ea.)
Solar cable (labelled SOLAR)
Temperature cable (labelled TEMP)
Drying cartridge (2 ea.)
