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Version 1.1 ©Copyright 2014, Ambient LLC. All Rights Reserved. Page 1
Ambient Weather WS-152B 6" Contemporary Barometer
User Manual
Table of Contents
2. Introduction ........................................................................................................................................ 2
3. Preparation ......................................................................................................................................... 2
4. Care and Cleaning .............................................................................................................................. 2
5. Barometer Operation .......................................................................................................................... 3
4.1 How the aneroid barometer works ................................................................................................ 3
4.2 Reading the barometer ................................................................................................................. 3
4.3 Absolute vs. Relative Pressure ..................................................................................................... 4
4.4 Barometer Calibration .................................................................................................................. 4
6. Installation ......................................................................................................................................... 5
7. Warranty Information ........................................................................................................................ 5
8. Liability Disclaimer ........................................................................................................................... 6
Version 1.1 ©Copyright 2014, Ambient LLC. All Rights Reserved. Page 2
2. Introduction
Thank you for your purchase of the Ambient Weather WS-152B 6" Contemporary Barometer. The
following is a guide for preparation, care and operation of your weather instrument.
3. Preparation
Your weather instrument includes a protective pad to prevent damage to the barometer mineral glass
case during shipment. Remove this protective pad and circular instruction sheet. The barometer is ready
to use.
4. Care and Cleaning
Avoid use of harsh household cleaners and coarse paper towels, which can scratch the bezel or lens.
Fingerprints and dirt may be removed the lenses and bezels with a soft cloth lightly dampened with a
mixture of water and mild dishwashing liquid. Be sure to dry the lens and bezel with a soft cloth after
cleaning.
Version 1.1 ©Copyright 2014, Ambient LLC. All Rights Reserved. Page 3
5. Barometer Operation
4.1 How the aneroid barometer works
An aneroid barometer uses a small, exible metal box called an aneroid cell. This aneroid capsule (cell)
is made from an alloy of beryllium and copper. The evacuated capsule is prevented from collapsing by
a strong spring. Small changes in external air pressure cause the cell to expand or contract. This
expansion and contraction drives mechanical levers such that the tiny movements of the capsule are
amplied and displayed on the face of the aneroid barometer. This model includes a manually set gold
needle which is used to mark the current measurement so a change can be seen. It was invented by
Blaise Pascal.
4.2 Reading the barometer
The ability if the barometer to indicate changes in barometric pressure makes it a useful instrument in
weather forecasting.
The weather forecast or pressure tendency is based on the rate of change of barometric pressure. In
general, when the pressure increases, the weather improves (sunny to partly cloudy) and when the
pressure decreases, the weather degrades (cloudy to rain).
The weather forecast is an estimation or generalization of weather changes in the next 24 to 48 hours,
and varies from location to location. The tendency is simply a tool for projecting weather conditions
and is never to be relied upon as an accurate method to predict the weather. Note: Barometric
pressure readings, under normal conditions, only uctuate between 1-1.25 inHg per day. Not to
be confused with +/- 1-1.25. So, the needle may never actually reach either forecast icon.
Q: My Barometer Forecast Is Incorrect or Inaccurate. It Does Not Reect the Weather Outside:
A: https://help.ambientweather.net/help/barometer-forecast/
The barometer includes a manually set gold needle, which is used to mark the current measurement so
a change can be seen. Barometric readings should be taken daily. Remember that the rate of change of
barometric pressure is important in determining weather changes. You may want to take multiple
readings each day during periods of unstable weather conditions.
The following basic rule of thumb will hold true in using the barometer to predict weather conditions.
• A fast rise in barometric pressure means good weather of short duration.
• A rapid drop in barometric pressure means disturbances nearby, showers of short duration.
• Regular elevation in barometric pressure usually will indicate a clear, dry weather conditions
(cold and dry in the winter).
• A slow but continuous drop in barometric pressure will indicate persistent, bad weather.
• Slow drops of 2-3 tenths mbar per 24 hours a depression of some distance away.
• Drops of 1-2 tenths mbar per hour means disturbances nearby of short duration.
• Steep drops of 6-10 tenths mbar within 4-5 hours period indicates coming rain and/or storm
with strong winds.
Produktspecifikationer
| Varumärke: | Ambient Weather |
| Kategori: | ej kategoriserat |
| Modell: | WS-152B |
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