La Crosse Technology C84612 - Manual (Page 22)

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Note: Until the first rainfall total reset is performed, the time and date of the total rainfall are displayed
as "- - -.--. ----". After the rainfall total is reset, the rainfall total display will indicate the date and time of the
last rainfall total reset.
COMMON TERMS
RELATIVE HUMIDITY
Relative humidity is how close the air is to saturation (how much moisture the air can hold). On a warm
day, more water can evaporate as there is more thermal energy to do the work of evaporation. Generally
the higher the temperature, the lower the RH as more evaporation takes place.
W IND CHILL-EQUIVALENT TEMPERATURE
A fictional temperature that is felt by human beings under certain conditions instead of the measured
temperature which can be taken into account during low temperatures. For La Crosse Technology®
products, these conditions are a Temperature below 40°F and a wind velocity above 5 mph.
W IND GUST
A wind gust is a sudden, brief increase in the speed of the wind (less than 20 seconds) followed by a lull.
This is different from a sustained wind.
MOUNT ING AND PL ACEMENT OF SENSORS AND DISPLAY
IMPORTANT: Ensure that all of the sensor data can be received at the intended mounting locations
before you drill mounting holes. The outdoor sensors have a wireless range of 200 feet. Keep in mind
that the 200 foot range equates to an open-air scenario with no obstructions. Each obstruction (roof,
walls, floors, ceilings, etc.) will reduce the range.
• The thermo-hygro sensor measures outdoor temperature & humidity and collects the data from the
wind and the rain sensors and sends all outdoor weather data to the wireless weather station, so the
thermo-hygro sensor must be within the 200 foot wireless range of the wireless weather station. This
allows the wind and rain sensors to be placed relative to the thermo-hygro sensor rather than the
wireless weather station. See the Wireless Connection Diagram below.
• The wind and rain sensors must be mounted within the 200 foot wireless range of the thermo-hygro
sensor and on the same side of the house. In addition, 915 MHz sensors transmit better at a
minimum mount height of 6 feet.
• The wireless weather station must be within the 200 foot wireless range of the gateway to upload
weather data to the Internet.