Ambient Weather WS-2000 User Manual

Version 2.12 ©Copyright 2020, Ambient LLC. All Rights Reserved. Page 53
Parameter
Type of
Calibration
Default
Typical Calibration Source
Temperature
Offset
Current Value
Red Spirit or Mercury
Thermometer (1)
Humidity
Offset
Current Value
Sling Psychrometer (2)
ABS
Barometer
Offset
Current Value
Calibrated laboratory grade
barometer
REL Barometer
Offset
Current Value
Local airport (3)
Wind Direction
Offset
Current Value
GPS, Compass (4)
Solar Radiation
Gain
1.00
Calibrated laboratory grade
solar radiation sensor
1 w/m
2
Gain
126.7 lux
Solar radiation conversion
from lux to w/m
2
for
wavelength correction (5)
Wind
Gain
1.00
Calibrated laboratory grade
wind meter (6)
Rain
Gain
1.00
Sight glass rain gauge with an
aperture of at least 4” (7)
Daily Rain
Offset
Current Value
Apply an offset if the weather
station was not operating for
the entire day.
Weekly Rain
Offset
Current Value
Apply an offset if the weather
station was not operating for
the entire week.
Monthly Rain
Offset
Current Value
Apply an offset if the weather
station was not operating for
the entire month.
Yearly Rain
Offset
Current Value
Apply an offset if the weather
station was not operating for
the entire year.
(1) Temperature errors can occur when a sensor is placed too close to a heat source (such as a
building structure, the ground or trees).
To calibrate temperature, we recommend a mercury or red spirit (fluid) thermometer. Bi-metal
(dial) and digital thermometers (from other weather stations) are not a good source and have
their own margin of error. Using a local weather station in your area is also a poor source due
to changes in location, timing (airport weather stations are only updated once per hour) and
possible calibration errors (many official weather stations are not properly installed and
calibrated).
Place the sensor in a shaded, controlled environment next to the fluid thermometer, and allow
the sensor to stabilize for 48 hours. Compare this temperature to the fluid thermometer and
adjust the tablet to match the fluid thermometer.
(2) Humidity is a difficult parameter to measure electronically and drifts over time due to
contamination. In addition, location has an adverse effect on humidity readings (installation
over dirt vs. lawn for example).
Official stations recalibrate or replace humidity sensors on a yearly basis. Due to
manufacturing tolerances, the humidity is accurate to ± 5%. To improve this accuracy, the
indoor and outdoor humidity can be calibrated using an accurate source, such as a sling

Ambient Weather WS-2000 Specifications

General

Display Type	Color LCD
Connectivity	Wi-Fi
Power Source (Console)	AC Adapter
Transmission Frequency	915 MHz
Data Logging	Yes
Indoor Temperature Range	32°F to 140°F (0°C to 60°C)
Indoor Humidity Range	10% to 99%
Outdoor Humidity Range	10% to 99%
Wind Direction	0° to 360°
UV Index Range	0 to 15
Console Display	Color
Sensors Included	Temperature, Humidity, Wind Speed, Wind Direction, Rainfall, UV, Solar Radiation
Power Source (Sensor Array)	Solar Panel with Battery Backup
Outdoor Sensor Range	Up to 330 feet (100 meters)
Transmission Range	Up to 330 ft (100 m) line of sight
Update Rate	16 seconds
Data Update Interval	16 seconds
Outdoor Temperature Range	-40°F to 140°F (-40°C to 60°C)
Rainfall Accuracy	+/- 5%
Rainfall Range	0 to 393.7 inches (0 to 9999 mm)
Wind Speed Range	0 to 100 mph (0 to 160 km/h)
Solar Radiation Range	0 to 1800 W/m²