User manual
Version 1.0 ©Copyright 2014, Ambient LLC. All Rights Reserved. Page 43
Term
Definition
Solar
Radiation
A solar radiation sensor measures solar energy from the sun.
Solar radiation is radiant energy emitted by the sun from a nuclear fusion reaction
that creates electromagnetic energy. The spectrum of solar radiation is close to that
of a black body with a temperature of about 5800 K. About half of the radiation is in
the visible short-wave part of the electromagnetic spectrum. The other half is mostly
in the near-infrared part, with some in the ultraviolet part of the spectrum.
Thermometer
A thermometer is a device that measures temperature. Most digital thermometers are
resistive thermal devices (RTD). RTDs predict change in temperature as a function
of electrical resistance.
Wind Vane
A wind vane is a device that measures the direction of the wind. The wind vane is
usually combined with the anemometer. Wind direction is the direction from which
the wind is blowing.
8. Specifications
8.1 Wireless Specifications
Line of sight wireless transmission (in open air): 330 feet, 100 feet under most conditions
Update Rate: Outdoor Sensor: 16 seconds, Indoor Sensor: 64 seconds
Frequency: 915 MHz
8.2 Measurement Specifications
The following table provides the specifications for the measured parameters.
Measurement
Range
Accuracy
Resolution
Indoor Temperature
32 to 140 °F
± 2 °F
0.1 °F
Outdoor Temperature
-40 to 149 °F sensor
-23 to 140 °F rechargeable
battery range (alkaline)
± 2 °F
0.1 °F
Indoor Humidity
1 to 99%
± 5%
1 %
Outdoor Humidity
1 to 99%
± 5%
1 %
Barometric Pressure
8.85 to 32.50 inHg
± 0.08 inHg (within range of
27.13 to 32.50 inHg)
0.01 inHg
Light
0 to 400,000 Lux
± 15%
1 Lux
Rain
0 to 394 in.
± 10%
0.01 in
Wind Direction
0 - 360 º
1º
1º
Wind Speed
0 to 100 mph (operational)
± 2.2 mph or 10% (whichever
is greater)
0.1 mph
8.3 Power Consumption
Base station : 5V DC Adaptor (included), Power Consumption: 7.5 Watts
Indoor Thermo-hygrometer-barometer sensor : 2xAAA batteries (not included)
Outdoor sensor array: 3xAA alkaline rechargeable batteries (included)