Ambient Weather WS-YG302 Bedienungsanleitung

Ambient Weather WS-YG302 Cherry Finish Brass Dial

Traditional Weather Station User Manual

Table of Contents

1. Introduction.....................................................................................................................................2

2. Preparation......................................................................................................................................2

3. Care and Cleaning...........................................................................................................................2

4. Hygrometer (Humidity Meter)........................................................................................................3

4.1 How the hygrometer works....................................................................................................3

4.2 Hygrometer Accuracy.............................................................................................................3

5. Aneroid Barometer..........................................................................................................................3

5.1 How the aneroid barometer works .........................................................................................3

5.2 Reading the barometer............................................................................................................3

5.3 Absolute vs. Relative Pressure......................................................................................................4

5.4 Barometer Calibration............................................................................................................4

6. Dial Thermometer...........................................................................................................................5

7. Installation.......................................................................................................................................5

8. Measurement Specifications ...........................................................................................................5

9. Warranty Information......................................................................................................................5

1. Introduction

Thank you for your purchase of the Ambient Weather WS-YG302 Cherry Finish Brass Dial

Traditional Weather Station. The following is a guide for preparation, care and operation of your

traditional weather station.

Figure 1

2. Preparation

Your weather instrument includes a protective pad to prevent damage to the barometer glass case

during shipment. Remove this protective pad and circular instruction sheet. The barometer is ready

to use.

3. Care and Cleaning

The solid wood case is finished with a clear, satin lacquer to protect and preserve the appearance.

Although occasional use of a good furniture polish is acceptable, we recommend periodic cleaning

with a very lightly water dampened soft cloth. Be sure to wipe the wood dry with a soft cloth before

cleaning.

Avoid use of harsh household cleaners and coarse paper towels, which can damage the lacquer coating

or 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.

Do not install the weather station outside. The weather station is intended for indoor use only.

4. Hygrometer (Humidity Meter)

4.1 How the hygrometer works

The hygrometer measures the indoor relative humidity. The sensor measures the air moisture by a

sensitive mechanical coil spring that is bonded with a moisture absorbent material.

Hygrometers register the percentage of water vapor present in the air, compared to the maximum

amount that can be present at a given temperature.

The coils in hygrometers respond slowly and while humidity levels change abruptly, it can take an

hour or more for the meter to reach an accurate reading. Remember that the hygrometer is reading

indoor humidity, and is vastly different than outdoor humidity, as reported by the National Weather

Service.

It is not uncommon to have low humidity reading during cold weather when indoor air is heater. Air

conditioning also removes moisture from the air. The optimum levels are 45% to 50% during

heating and cooling seasons. Low humidity can cause health problems and can be hard on wood

furnishings. High humidity can cause mold or mildew to grow.

4.2 Hygrometer Accuracy

Humidity measurement is among the more difficult problems in basic meteorology. Accuracy is

difficult to achieve and are subject to drift, so need regular recalibration.

A further difficulty is that most hygrometers sense relative humidity rather than the absolute amount

of water present, but relative humidity is a function of both temperature and absolute moisture content,

so small temperature variations within the air in a test chamber will translate into relative humidity

variations.

5. Aneroid Barometer

5.1 How the aneroid barometer works

An aneroid barometer uses a small, flexible metal box called an aneroid cell. This aneroid capsule

(cell) is made from an alloy of beryllium and copper. The evacuated capsule (or usually more

capsules) 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 amplified and displayed on the face of the aneroid barometer. Many

models include a manually set needle which is used to mark the current measurement so a change can

be seen. It was invented by Blaise Pascal.

5.2 Reading the barometer

It is highly advisable to lightly tap the glass near the center brass knob with your fingers before taking

a barometer reading. The light tap will overcome any friction that may affect accurate hand readings,

especially during periods of slow atmospheric changes. The Coast Guard has informed us that tapping

the barometer is even required on the most expensive aneroid barometers, because the mechanism is

made deliberately “stiff”.

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.

The barometer includes a manually set 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 goo 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.

5.3 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.

5.4 Barometer Calibration

Your barometer will operate from -100 to 3,000 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.

6. Dial Thermometer

The dial thermometer uses a bimetallic strip wrapped into a coil. One end of the coil is fixed to the

housing of the device and the other drives an indicating needle. The principle behind a bimetallic strip

thermometer relies on the fact that different metals expand at different rates as they warm up.By

bonding two different metals together, the coil bends, causing the needle to move. Bimetallic

thermometers are not as accurate as bulb (mercury or red spirit) thermometers. The dial thermometer

should require no calibration.

7. Installation

To install the traditional weather station, hang the plaque on a wall with the hole built into the plaque.

Only install indoors, in a clean area.

8. Measurement Specifications

The following table provides specifications for the measured parameters.

Measurement

Range

Accuracy

Resolution

Indoor Temperature

-40 to 140 °F

± 3.6 °F

2 °F

Indoor Humidity

0 to 100 %

20% –45%: ± 9%

45% –75%: ± 6%

75% –98%: ± 9%

1 %

Barometric Pressure

940 hPa to 1070 hPa

(about -100 to 7,000’)

1060hPa –1030hPa: ± 10hPa

1030hPa –990hPa: ± 5hPa

990hPa –960hPa: ± 10hPa

1 hPa

9. Warranty Information

Ambient, LLC provides a 1-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

only to the original purchaser of this product. To receive warranty service, the purchaser must contact

Ambient, LLC for problem determination and service procedures.

Warranty service can only be performed by a Ambient, LLC. The original dated bill of sale must be

presented upon request as proof of purchase toAmbient, LLC.

Your Ambient, LLC warranty covers all defects in material and workmanship with the following

specified exceptions: (1) damage caused by accident, unreasonable use or neglect (lack of reasonable

and necessary maintenance); (2) damage resulting from failure to follow instructions contained in your

owner’s manual; (3) damage resulting from the performance of repairs or alterations by someone other

than an authorized Ambient, LLC authorized service center; (4) units used for other than home use (5)

applications and uses that this product was not intended, such as outdoor use.

This warranty covers only actual defects within the product itself, and does not cover the cost of

installation or removal from a fixed installation, normal set-up or adjustments, claims based on

misrepresentation by the seller or performance variations resulting from installation-related

circumstances.

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