Ambient Weather GL152-BO Manual do utilizador - Página 5

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Steep drops of 6-10 tenths mbar within 4-5 hours period indicates coming rain and/or storm

with strong winds.

4.3 Absolute vs. Relative Pressure

To compare pressure conditions from one location to another, meteorologists correct pressure to

sea-level conditions. Because the air pressure decreases as you rise in altitude, the sea-level corrected

pressure (the pressure your location would be at if located at sea-level) is generally higher than your

measured pressure.

Thus, your absolute pressure (measured at your location) may read 28.62 inHg (969 mb) at an altitude

of 1000 feet (305 m), but the relative pressure (sea-level) is 30.00 inHg (1016 mb).

The standard sea-level pressure is 29.92 in Hg (1013 mb). This is the average sea-level pressure

around the world.

Relative pressure measurements greater than 29.92 inHg (1013 mb) are

considered high pressure and relative pressure measurements less than 29.92 inHg are considered low

pressure.

To determine the relative pressure for your location, locate an official reporting station near you (the

internet is the best source for real time barometer conditions, such as Weather.com or

Wunderground.com), and set your weather station to match the official reporting station.

Your barometer will operate from -100 to 7,000 feet with reliable accuracy. Aneroid barometers have a

small screw on the back for sea-level calibration. With a flat blade screwdriver, turn this screw in

either direction slightly while looking at the indicator needle. It should move in one direction or the

other. Tap the barometer to see where the needle settles. Continue this procedure until the proper

pressure reading is obtained. Do not turn the screw counter-clockwise (to the left) too far, since the

screw can fall out. After the initial calibration, no further adjustment will be required unless the

barometer is moved to a new geographic location.

This unit is waterproof with double seals on the front and back of the unit and can be submersed in

300mm of water for 3 months and includes a 5 year warranty against corrosion.

The manufacturing process includes double plating: Physical Vapor Deposition (PVD) Zirconium

plating over Chromium plating. Zirconium is a metal which has a high hardness and melting point. It

is corrosion resistant, and will never tarnish, discolor or scratch.

The surface of Zirconium Coating has the color of brass, with a mirror, hand polished finish. The

aluminous dial is suitable for various weather harsh conditions.

High quality stainless steel mounting screws with PVD Zirconium plating are included. All fasteners

are made of stainless steel, suitable for salt water environments.

Ambient, LLC provides a 5-year limited warranty on this product against manufacturing defects in

materials and workmanship.

This limited warranty begins on the original date of purchase, is valid only on products purchased and

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