La Crosse Technology C86234 - Manual (Page 24)

RESET TOTAL RAINFALL AMOUNT
The total rainfall measurement is displayed in the unit of mm or inch. It shows the total rainfall
accumulated since last reset of the total rainfall amount.
In either Mode 1 or Mode 2 display, press and release the MIN/MAX button until the display
shows the Total Rainfall value.
Press the
▲/DATE button to reset the Total Rainfall reading on the display. The total rainfall
amount will be reset to 0, and the time is updated to current time.
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:
DEW POINT TEMPERATURE
Dew point is the saturation point of the air, or the temperature to which the air has to be cooled
in order to create condensation (100% humidity). Dew Point Temperature reflects the point at
which condensation and evaporation are equal.
Dew Point Temperature is the accurate measure of the quantity of water vapor in the air. Dew
Point Temperature does not change with air temperature changes. It only changes with
moisture content changes with barometric pressure stable.
Note: Dew Point is lower than the actual temperature.
Note: A Frost Point occurs when the Dew Point Temperature is below freezing.
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. The RH may be low and you can still have condensation when at the Dew Point
Temperature.
WIND CHILL-EQUIVALENT TEMPERATURE
A fictional temperature that is felt by human beings under certain conditions instead of the
measured temperature and which can be taken into account during low temperatures. For La
Crosse Technology Products these conditions are a Temperature below 40 degrees Fahrenheit
and a Wind velocity above 5 mph.
WIND 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.
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