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1. ambient weather Fischer 1508BTH 45 5 Brass Barometer with Temperature amp Humidity User Manual ambient weather Table of Contents e O E E E E E une teshsavaeiehanet 2 2 Care and CVC A e E e eE Earra 2 J BaromeTr Oc O e A i anuseasamansuavoayaaatananadstesaasechouenscguanas 2 S A HOW the ancroid barometer WOLKS s s0ni sos testransiaaisanctandseuadonssandland ies aaa ara enumeddionsneind Uelssasbstwwationss 2 3 2 Pe AI iG AT OMICLED cc2ccce lt cocceseaaasse2enaetseseecntecateenseeassaatensesaascetesomnesassdconsuneponacosenecsacnesuemsanss 3 3 3 Absolute VS Relative PIC SS Whe oansein a aa 3 3 4 Barom e a AO ne EE 3 d Hygrometer and ENErmOnmie I eeh a E EER ENEE tienen 4 4 1 POW The hysromeler WOrKS mescere n E ER EEE ioari 4 a Ds a D E EES E o TE E EA F A N T A E AE A 4 da Dial Thermo metet srein er E O R S UO OE EE Inrena 4 Js Maranty MMOL TAG OM ceca ncccceeesccectennesectsnstcectuantenotunsteeetensteactenateweneneonseneseenpcceneonssbeseensceatecassnesbensceas 5 C Laoi Ts a aaa E E de cue danecncedenncnandeunceenaer TT beter eb T TE T biesesett 5 Version 1 0 Copyright 2015 Ambient LLC All Rights Reserved Page 1 2 ambient weather 1 Introduction Thank you for your purchase of the Fischer Instruments 1508BTH 45 5 Brass Barometer with Temperature amp Humidity The following is a guide for preparation care and operation of your marine weather instrument Note Some of the images are generic and may not matc2. fferent 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 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 4 3 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 Version 1 0 Copyright 2015 Ambient LLC All Rights Reserved Page 4 2 ambient weather thermometers are not as accurate as bulb mercur
3. h your exact model 2 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 3 Barometer Operation Figure 1 A Barometer Mechanism Case B Barometer calibration set screw 3 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 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 This model includes a manually set gold needle which is used to mark the current measurement so a change can be seen It Version 1 0 Copyright 2015 Ambient LLC All Rights Reserved Page 2 2 ambient weather was invented by Blaise Pascal 3 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 ge
4. in 4 5 hours period indicates coming rain and or storm with strong winds 3 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 3 4 Barometer Calibration Your barometer can not be pre calibrated at the factory for your altitude so you must calibrate the barometer for your specific location 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 Version 1 0 Copyright 2015 Ambient LLC All Rights Reserved Page 3 2 ambient weather Wunderground com and set your weather station to match the official reporting station Your ba
5. neral 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 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 e A fast rise in barometric pressure means good weather of short duration e A rapid drop in barometric pressure means disturbances nearby showers of short duration e 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 with
6. r performance variations resulting from installation related circumstances 6 Liability Disclaimer Reading the User manual is highly recommended The manufacturer and supplier cannot accept any responsibility for any incorrect readings and any consequences that occur should an inaccurate reading take place The specifications of this product may change without prior notice This product is not a toy Keep out of the reach of children No part of this manual may be reproduced without written authorization of the manufacturer Ambient LLC WILL NOT ASSUME LIABILITY FOR INCIDENTAL CONSEQUENTIAL PUNITIVE OR OTHER SIMILAR DAMAGES ASSOCIATED WITH THE OPERATION OR MALFUNCTION OF THIS PRODUCT Version 1 0 Copyright 2015 Ambient LLC All Rights Reserved Page 5
7. rometer will operate from 100 to 3 000 feet with reliable accuracy Aneroid barometers have a small screw on the back for sea level calibration reference Figure 1 B With a flat blade screwdriver turn this screw in either direction slightly while looking at the indicator needle Turn counter clockwise to increase the barometer and clockwise to decrease the barometer 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 If the barometer needle exceeds the measurement range do not continue to turn the set screw This is likely occurring because you live outside the barometer operating range After the initial calibration no further adjustment will be required unless the barometer is moved to a new geographic location 4 Hygrometer and Thermometer 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 di
8. y or red spirit thermometers The dial thermometer should require no calibration 5 Warranty Information 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 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 to Ambient 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 o
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