Campbell Scientific TurfWeather Weather Station - Manual (Page 45)

TurfWeather Weather Station
6.3 Temperature/Relative Humidity Sensor pn 14144
The temperature/relative humidity sensor has a life expectancy of 18 months.
The relative humidity measurement will begin to drop off as the sensor ages. It
is located on the bottom of the weather station inside the slotted cylinder-
shaped protector. Take care not to expose this sensor to overspray from
pesticides, fertilizers, etc. Use a soft brush to remove dust and cob webs from
sensor area. See Section 6.9.3, Temperature/Relative Humidity Sensor
Assembly Replacement Procedure, for instructions on replacement.
6.4 Solar Radiation Sensor pn 14009
The solar radiation sensor has a life expectancy of approximately five years, at
an expected 2% per year degradation rate. This sensor is replaced rather than
recalibrated. It is the small round sensor located on the opposite end from the
wind sensors. Keep this sensor clean using a soft cloth and very mild soapy
water, and follow up with a clean damp cloth with water only. See Section
6.9.4, Solar Radiation Sensor Replacement Procedure, for instructions on
replacement.
6.5 Rain Gage pn 25585
The rain gage has a life expectancy of five years or more. It is the box-shaped
sensor on top of the weather station. Keep the funnel area clean from debris
such as leafs and pine needles. Keep the tipping mechanism spoon clean by
removing accumulated dirt build up. The spoon can be accessed by removing
the top funnel from the main body of the rain gage. Hold the body with one
hand while removing the funnel. The body, base, and funnel all just press
together with no fasteners holding them. One tip of the spoon measures 1 mm
(0.03937008 in) of rain. See Section 6.9.5, Rain Gage Replacement
Procedure, for instructions on replacement.
6.6 Wind Speed Sensor pn 14010
The wind speed sensor has a life expectancy of five years or more. It is the
black sensor with three cups that rotate as the wind blows. To check the wear
of this sensor, gently rotate the sensor using your thumb and forefinger on the
top point of the sensor. The sensor should move freely and feel very smooth.
See Section 6.9.6, Wind Speed Sensor (Anemometer) Replacement Procedure,
for instructions on replacement.
6.7 Wind Direction Sensor pn 14011
The wind direction sensor has a life expectancy of five years or more. It is the
black sensor with a tail on one end and a stainless steel nose on the other end.
To check the sensor for wear, gently rotate the sensor’s top half. The sensor
should move freely and feel very smooth. See Section 6.9.7, Wind Direction
Sensor Replacement Procedure, for instructions on replacement.
6.8 Memory Battery pn 15598
The memory battery is a small coin cell type battery that will keep the clock
time correct and the stored data when the power supply and battery pack are
not supplying power to station. Life expectancy is five years or more. This
battery voltage should be above 3 Vdc, and can be displayed using PC200W
software. The battery manufacturer’s model number is the CR1016. See
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