TFA Dostmann 20.1082.17 Handleiding

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Important: Adjust the barometer before use!

The barometer has to be adjusted first to your

local altitude.

Ask for the present atmospheric pressure of your home area (Local weather service, www, optician,

calibrated instruments in public buildings, airport). Carefully turn the adjusting screw to the right using

a small screw-driver until the pointer value concides with the actual atmospheric pressure.

Do not turn the barometer movement too far! Better precision can be achieved by Ijghtly tapping the

barometer glass after adjustment has been made.

Thermometer and hygrometer have been adjusted in the factory.

For readjustment compare the indicated value with a well-calibrated instrument.

Pointer movements can be corrected by carefully turning the adjusting screw at the back.

To regenerate the hygrometer wrap the instrument once a year in a moist piece of cloth for 30 min.

How the barometer works:

The barometer measures the atmospheric pressure in hekto-pascal (hPa), Millibar (mb) or inch (in).

The atmospheric pressure corresponds with the weight of the surrounding air masses and depends

on the weather situation and the local altitude.

The observation of the changes in atmospheric pressure allows you to weather forecast.

Simply mark the current air pressure with the movable needle and observe the changes:

IncreaseFine weather

Rapid increaseShort period of fine weather

decreaseBad weather

Rapid decreaseThunder and storm

Product specificaties