Kestrel 4300 (Construction) Instrukcja Użytkownika Pobierz pdf (Strona 14)

Kestrel

4300 Construction Weather Tracker 27

Heat Index

A practical measure of how hot the current combination of relative humidity and temperature feels to a

human body. Higher relative humidity makes it seem hotter because the body’s ability to cool itself by

evaporating perspiration is reduced.

Reference Pressure

The local barometric pressure. Input to the altitude screen to provide correct altitude readings. Also known

as the altimeter setting.

Relative Humidity

The amount of water vapor actually in the air divided by the maximum amount of water vapor the air could

hold at that temperature, expressed as a percentage.

Station Pressure

The air pressure of your location, NOT reduced to the sea level equivalent.

Temperature

The ambient air temperature.

Wet Bulb Temperature

The lowest temperature to which a thermometer can be cooled by evaporating water into the air at constant

pressure. This measurement is a holdover from the use of an instrument called a sling psychrometer. To

measure wet bulb temperature with a sling psychrometer, a thermometer with a wet cloth covering over

the bulb is spun rapidly through the air. If the relative humidity is high, there will be little evaporative

cooling and the wet bulb temperature will be quite close to the ambient temperature. Some exercise

physiology guides use wet bulb temperature, rather than heat index, as a measure of the safety of exercise in

hot and humid conditions.

Wind Chill

The cooling eect of combining wind and temperature. The wind chill gives a more accurate reading of

how cold it really feels to the human body. The Kestrel Meter’s wind chill is based on the National Weather

Service standards as of November 1, 2001.

DEFAULT SETTINGS

UNIT METRIC IMPERIAL

Wind Functions M/s mph

Temperature Functions °C °F

Barometric Pressure hPa inHg

Altitude Functions M Ft

Time Format 24 hour 12 hour

Date Format Day/month/year Month/day/year

SETTING FACTORY DEFAULT

Automatic Data Store On

Data Store Rate 1 hour

Data Overwrite On

Manual Data Store On

User Screen 1 Wind speed, temperature, humidity

User Screen 2 Humidity, dewpoint, wet bulb

User Screen 3 Pressure, altitude, density altitude

Display Contrast 10

Automatic Shutdown 15 minutes

Language English

PC Upload

Stored data may be uploaded to a PC with the optional Kestrel Interface.

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