Casella CEL Automatic weather station - Manual (Page 23)

Output calibration: Typically 100 µV/W/m², supplied with
individual calibration details
3.4.2 Solarimeter - Sensus Channel Configuration
Description Solarimeter
Units W/m 2
Type Analog
Information Single ended
Gain x 1
No current source
Display Format ####.#
Polynomial -27, 11990.4
(sensor specific)
Enabled Yes
Logged Yes
Minimum Limit 0.0
Maximum Limit 2000.0
3.4.3 Sunshine Duration
The Sensus Logger can determine daily Sunshine hour values. The accumulated
total is determined based upon the time during which the solarimeter has been
exposed to a radiation level exceeding a threshold of 200 W/m².
3.5 Standard Barometric Pressure Sensor
The weather station may be fitted with a
standard integral barometer mounted on a
circuit board in the data logger, which itself is
inside the environmental case. A 1 mm
ventilation hole in the case ensures the
internal pressure remains at ambient.
A monolithic silicon transducer
senses pressure by means of a silicon
diaphragm into which a “bridge” of piezo
resistors have been defused.
3.5.1 Standard Barometric Pressure Sensor Specification
Part number: 183014B
Transducer: The pressure sensor is temperature stabilised
at 60
o
C
Range: 800 to 1100 hPa (mB)
Operating temp: -40°C to + 85°C
Accuracy: <1 hPa (mB)
Temperature drift: Typically <0.15 mB/°C
Supply voltage: 9 - 12 V nominal
Power consumption: Approx. 10 mA at 12 V
Standard Sensors
The standard pressure sensor
board in the Sensus Logger
Page 23 of 34
Automatic Weather Station
Assembly & Commissioning Handbook