5. General Description
Contents
1. ambient weather Ambient Weather WM 35 Handheld Wind Meter with Temperature Humidity Barometer User Manual ambient weather Table of Contents 2 ATOU Oiee A EEE E 2 1 1 a 5 E e E E N E E nsorasetaneiueniucstasthasie 2 De Mande eT 2 W A E E EE E E 2 3 General DESsCm OU ON sses uniesie ainis a aae ai ae ai ienis 3 o OO E E T E E E R 4 6 1 Poner ne Ee E raan E E EE 4 6 2 MTS ley MOO vs eae TE E 4 02l Wind eS sieneen a e e Ea a a aaa Oae ake 5 O W aig E E E A caqceninastendec 5 s RA eaa E EEEE 6 624 Heat ndx sinski a ai in e hlaced sybian 6 O23 Dew Poll eeen e E E E Mebaedioease 7 020 Prometi Prese yc sccrecceccsansatecsansatcssascdcemeosoaasoaasaaancnassaarseansaces a toadeovansaduneeseaaentoanmcaaneds 7 Oey Pressun Ald ats ctanactccauestesaanasidsaduestalseaesadticcauns e e 8 6 3 MN MIx Aye Te repa A E EEA EA ETRE 8 6 4 MS MAUS We WAC AS UMS P EE AE A E AE EE A E E A E A EA AAT 9 6 5 Backi 09 Fean e E nner mye tome tt mir errr nn enn nT iret 9 6 6 se Rea ee oc a an i ie ie er ie 9 6 7 A AID TALON FC ALUN esseen nnen a a a a iasa nin A 9 6 7 1 Wind Speed Calibration sese sese 9 O72 Temperature al Diao sineren i ERE 10 OJo Humidity Ft esseere EAEE EAEE AEE EREE 10 O24 Barometer C aHDraN Ois a 10 67 3 Presstire Altitude CaN Drain 4 s cssssnossaacenseaseneonmanecucsaaianuacnatadenunerocunausadncsaniaseaneneadeapies 11 OG Pecali aubraon Noles icenen eee E E EE arrira 11 6 8 L w Battery Indicator enion E E E dau lanadauni2. F Max Min Avg wind chill temperature reading display HOLD Displayed when meter is on hold mode Beaufort scale Wind chill reading based on mode setting Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 5 ambient weather 6 2 3 Relative Humidity 4 E mogan TEINE LU ARH 1 Figure 6 1 Relative humidity units RH S O 3 HOLD Displayed when meter is on hold mode O Z oS O 4 Beaufort scale o OSOS 5 Relative humidity reading based on mode setting Z gt Z o O 6 2 4 Heat Index 2 MAX MIN AVG 5 1 Heat index HOI gt D D D a mi C F 1 Pa Figure 7 l Heat Index Temperature units C or F SSS O 3 HOLD Displayed when meter is on hold mode 4 Beaufort scale 3 Heat index reading based on mode setting Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 6 ambient weather 6 2 5 Dew Point 3 2 gy CD MAX MIN AVG 11 10 Dew point T ALILILICLILE a poo C L 1 A Figure 8 1 Dew Point Temperature units C or F 2 Max Min Avg dew point temperature reading display 3 HOLD Displayed when meter is on hold mode 4 Beaufort scale 3 Dew Point reading based on mode setting 6 2 6 Barometric Pressure 3 2 A MAX L AVG N e hpa mbar inHg Figure 9 Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 7 ambient weather 1 Barometric pressure units
3. and then the O button at the same time to enter the calibration mode Press the Units button four times and the number 5 will be displayed I Press the O button to continue with the density altitude calibration X1 units of density altitude will flash Press Set to adjust Press Units button and x10 units of density altitude will flash Press Set to adjust Press Units button and x100 units of density altitude will flash Press Set to adjust Press Units button and x1000 units of density altitude will flash Press Set to adjust To exit the calibration mode at any time press the button and the meter will power off 6 7 7 Special Calibration Notes 6 7 7 1 Temperature Temperature errors can occur when a sensor is placed too close to a heat source such as your body temperature To calibrate temperature we recommend a mercury or red spirit fluid thermometer Bi metal dial and digital thermometers from other weather stations are not a good source and have their own margin of error Using a local weather station in your area is also a poor source due to changes in location timing airport weather stations are only updated once per hour and possible calibration errors many official weather stations are not properly installed and calibrated Place the sensor in a shaded controlled environment next to the fluid thermometer and allow the sensor to stabilize for 48 hours Compare this temperature to the fluid thermometer and a
4. based mainly on observed sea conditions on land it is categorized by the physical effects it has on vegetation and structures Its full name is the Beaufort Wind Force Scale Dew Point The dew point is the temperature at which a given parcel of humid air must be cooled at constant barometric pressure for water vapor to condense into water The condensed water is called dew The dew point is a saturation temperature The dew point is associated with relative humidity A high relative humidity indicates that the dew point is closer to the current air temperature Relative humidity of 100 indicates the dew point is equal to the current temperature and the air 19 maximally saturated with water When the dew point remains constant and temperature increases relative humidity will decrease Heat Index The Heat Index sometimes referred to as the apparent temperature 1s a measure of how hot it really feels when relative humidity is factored with the actual air temperature To find the Heat Index temperature look at the Heat Index chart below As an example if the air temperature is 96 F and the relative humidity is 65 the heat index how hot it feels is 121 F IMPORTANT Since heat index values were devised for shady light wind conditions exposure to full sunshine can increase heat index values by up to 15 F Also strong winds particularly with very hot dry air can be extremely hazardous The Heat Index Chart shaded zone above
5. hpa mbar inHg Max M in Avg dew pressure reading display HOLD Displayed when meter is on hold mode Barometric pressure reading based on mode setting 6 2 7 Pressure Altitude MAX MIN AVG K P ate a ra Lea Pha aay j l l f f f I eins a a E E E E E E E Figure 10 1 Pressure Altitude units m ft 2 Max Min Avg density altitude reading display oS O 3 Beaufort scale 4 Pressure altitude reading based on mode setting 6 2 7 1 Relative Altitude Ascent To view the relative altitude or the change in altitude since last calibrated referred to as climb or ascent descent press and hold the Units button for two seconds and relative altitude will be displayed Press and hold the Units button again for two seconds to change back to Density Altitude 6 3 Min Max Avg Mode I While the meter is powered up press the O button to view the maximum value recorded since the meter was powered up The MAX icon will be displayed i Press the O button again to view the minimum value recorded since the meter was powered up The MIN icon will be displayed I Press the O button again to view the average value recorded since the meter was powered up The AVG icon will be displayed Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 8 ambient weather I Press the O button again to view the current measured value 6 4 Units of Measure Press the Units button to change the units of measur
6. 105 F shows a level that may cause increasingly severe heat disorders with continued exposure or physical activity Heat Index is not calculated below 80 F Measured Absolute pressure is the barometric pressure measured at your location The Pressure or Absolute pressure is adversely affected by altitude and to a lesser extent changes in Absolute the weather Pressure Pressure Pressure Altitude is the altitude in the International Standard Atmosphere an Altitude atmospheric model of how the pressure changes over a wide range of altitudes calculated from the measured air pressure Resolution Resolution is defined as the number of significant digits decimal places to which a value is being reliably measured Sea level Sea level Pressure is the relative pressure measured at your location compensated Pressure or to sea level To compare pressure conditions from one location to another Relative meteorologists correct pressure to sea level conditions Pressure Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 13 ambient weather True Altitude True altitude is the elevation above mean sea level To measure true altitude you must know your exact position on the earth as measured by a GPS An altimeter measures pressure altitude The Beaufort Scale is displayed on the top and left side of the display and is defined as follows po Cam _ 002 OI Ol Ol 058 6 Strongbreeze 10 8 13 8 2
7. 2 27 25 31 39 49 2126 2735 8 Gale 17 2 20 7 34 40 39 46 62 74 3386 4093 9 Strong gale 20 8 24 4 41 47 47 54 75 88 4094 4822 8 Specifications 8 1 General Specifications Wind Speed Update Interval 0 5 seconds Temperature Update Interval 0 1 seconds Humidity Update Interval 1 second Power Source 1 x 3V lithium cell CR2032 Battery Life About 1 year under normal usage accelerated if power on is overridden Dimensions L x W x H 1 6 x 0 75 x 4 5 40 x 19 x 115 mm 8 2 Measurement Specifications The following table provides specifications for the measured parameters 03 O O 080 Wind speed Lad j Dew point Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 14 ambient weather Barometric pressure Altitude Other specifications Battery CR2032 2 0V Operating temperature 10 50 C 14 122 F Storage temperature 10 to 60 C 14 to 140 F Operating humidity 10 to 90 RH Storage humidity S 75 About 2 5mA 5mA with backlight on 60g 9 Troubleshooting Guide To download the latest manual and additional troubleshooting tips please visit http ambientweather wikispaces com wm3 If your question is not answered here you can contact us as follows 1 Email Support support ambientweather com 2 Technical Support 480 346 3398 M F 8am to 4pm Arizona Time It is normal for the impeller to oscillate as it comes
8. altitude you do not want to calibrate the pressure and are likely interested in the measured or absolute pressure If you are tuning your race car at a track or your RC plane air density 1s important and this is based on measured or absolute pressure If you are stationary and use the barometer to monitor changes in the weather then you are likely interested in relative pressure or barometer corrected to sea level The following is a brief discussion on absolute measured pressure vs relative corrected to sea level pressure The measured barometer is referred to as absolute pressure This meter displays absolute pressure To compare pressure conditions from one location to another meteorologists correct pressure to sea level conditions referred to as relative pressure Because the air pressure decreases as you rise in altitude the relative pressure the pressure your location would be at if located at sea level is generally higher than your absolute pressure Thus your absolute pressure may read 28 62 inHg 969 mb at an altitude of 1000 feet 305 m but the relative pressure is 30 00 inHg 1016 mb The standard relative pressure is 29 92 in Hg 1013 mb This is the average relative pressure around the world Relative pressure conditions greater than 29 92 inHg 1013 mb are considered high pressure and less than are considered low pressure Most weather stations instruct you to find a reporting station near your locati
9. arienneder 13 Te Glossaty of Terms s xananatananieensnerinasiaaaiessanenieadeceusbieginaseaneaniesianananenit E karen NR ES E NK a KE aae a 13 Oe CC O E E EE E E 14 8 1 Cereri Spe ea O oer E A EE 14 8 2 Measurement Spec1IHCaHOHS sese eee eee e 14 Di ApS Ot E Ta aa aac cre rctearderesree ea cease creeds toc wm doe nas cisco ect oeeen ta cmamuiacna daa antiedl Cepanekcreawnbicicun 15 10 PRC CE SONG TT 16 11 Wales iy ET tacetacacssctevaacatheeesasciseatisdbseateadavataudlanedareniveedadtiuadtaddavataudbaledcecdtiseddedieveaciddtves 16 12 Warranty Information sse eee eee ee eee 16 13 Mery Cy Cle tale MN 1 a tcss sa ates E E 17 Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 1 2 ambient weather 2 Introduction Thank you for your purchase of the Ambient Weather WM 35 Wind Meter with Wind Speed Temperature Humidity Barometer Wind Chill Dew Point and Heat Index The following user guide provides step by step instructions for installation operation and troubleshooting To download the latest manual and additional troubleshooting tips please visit http ambientweather wikispaces com wm35 The WM 35 wind meter features Wind speed in mph Km h m s ft min or Knots Beaufort wind scale bar graph Wind Speed min max average selection Open Air temperature and humidity sensors for fast response Temperature display in degrees Fahrenheit or Celsius Humidity Wind Chill Dew Point and Heat Index Barom
10. at occur should an inaccurate reading take place This product is designed for use in the home only as indication of weather conditions This product is not to be used for medical purposes or for public information 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 12 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 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 con
11. djust the console to match the fluid thermometer 6 7 7 2 Humidity Humidity is a difficult parameter to measure electronically and drifts over time due to contamination In addition location has an adverse affect on humidity readings measuring over dirt vs lawn for example Official stations recalibrate or replace humidity sensors on a yearly basis Due to manufacturing tolerances the humidity is accurate to 5 To improve this accuracy the indoor and outdoor humidity can be calibrated using an accurate source such as a sling psychrometer or humidipack Another low cost method is the saturated salt test For more information visit http ambientweather wikispaces com wm35 6 7 7 3 Wind Speed Impeller bearings moving parts wear over time Without a calibrated source wind speed can be difficult to measure We recommend using a calibrated wind meter available from Ambient Weather and a constant speed high speed fan or an accredited wind tunnel Do not attempt to calibrate in a moving vehicle The constant high speed may damage the impeller Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 11 ambient weather 6 7 7 4 Barometer The most frequently asked question about the barometric pressure is why do I need to calibrate the barometer The answer is based on how you use the meter and your specific application If you use it to hike or travel and your barometric pressure is changing due to
12. e eee ae 1 hpa mbar inHg RH T F d m s ftimin knots km h mph Figure 3 6 1 Powering On and Off I To power ON the meter press the O button To save power the meter will power off automatically after 10 minutes I To override the Auto Power Off hold down the Set button and then press the O button at the same I time The power icon O will remain on the display upper left hand corner until the batteries run down or the meter is turned off i To power OFF the meter press and hold the O button for two seconds 6 2 Display Modes Press and hold the SET button for two seconds to change the display modes Wind Speed gt Wind Chill gt Relative Humidity gt Heat Index gt Dew Point gt Barometric Pressure gt Pressure Altitude Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 4 ambient weather 6 2 1 Wind Speed 3 2 12 MAX MIN AVG ra ra ra ra r B Tal sls B U U U U U 0 m s ft min knots km h mph 1 Figure 4 Wind speed units m s ft min knots km h mph MAX Maximum wind speed recorded while in this mode MIN Minimum wind speed recorded while in this mode AVG Average wind speed recorded while in this mode ooo HOLD Displayed when meter is on hold mode Wind speed reading based on mode setting 6 2 2 Wind Chill 3 2 o MAX MIN AVG Wind chill Gp SD FTD 0D FD 5 T SE 1 d p DEDNI Figure 5 Wind Chill temperature units C or
13. e of the measurement currently displayed 6 5 Backlight Feature The backlight will automatically turn on then you press any button The backlight will automatically turn off after 10 seconds of inactivity to save battery life 6 6 Hold Mode The purpose of the Hold mode is to hold the measured value in the event you cannot read the display when taking a measurement example inside a duct To enter the HOLD mode press and hold the Units button for two seconds The HOLD icon will be displayed To exit the HOLD mode press and hold the Set button for two seconds and the hold icon will disappear NOTE This function is different for altitude Refer to Section 6 2 7 1 for details 6 7 Calibration Feature Note Read Section 6 7 7 first before performing any calibration Note Each time you enter the calibration mode for a particular measurement it will display the default measured value Note Dew Point Heat Index and Wind Chill are calculated parameters and cannot be calibrated directly and are based on the calibrated temperature humidity and wind speed measurements 6 7 1 Entering the Calibration Mode The calibration feature supports wind speed Mode 1 temperature Mode 2 humidity Mode 3 barometer Mode 4 and density altitude Mode 5 calibration I With the meter powered off press and hold the Units and O button at the same time for one second to enter the calibration mode 6 7 2 Wind Speed Calibration The
14. etric Pressure Pressure Altitude LED backlight Wind Speed HOLD feature Low battery display Lanyard included Soft case included Auto power off with override feature Wind speed temperature and humidity calibration CE Certified amp RoHS Compliant 1 1 Parts List 1 Wind Meter 1 1 CR2032 3 Volt Lithium Battery Soft Carrying Case User Manual 3 Warnings and Cautions Ay Warnings e This meter is accurate at low and mid range air speeds Consistent use at very high speeds example from the window of a fast moving car will damage the impeller s bearing and reduce accuracy e This meter is not a personal safety device 4 Getting Started 1 Open the battery cover as shown in Figure 1 Turn counter clockwise to open 2 Inset the included 3V CR2032 lithium cell battery with the terminal up Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 2 ambient weather 3 Replace the cover by turning clockwise All of the LED segments will briefly light up TH MAX MIN AVG ta Heat index Wind chill Dew point pantata ta H hpa mbar inHg RH YC F 1 Mane Impeller wind speed o 4 Wind Speed Units and temperature selection buon 5 Powerbuttom 6 Setbutton S O 8 Lanyard attachment point o O Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 3 ambient weather 6 Operation MAX MIN AVG Ga Heat index Wind chill Dew point nnn eo re e
15. on to identify the relative pressure A good source is Wunderground com If you correct your pressure to sea level relative pressure if you change locations or altitude you will have to calibrate the relative pressure again 6 7 7 5 Pressure Altitude Altimeters are often misunderstood because they do not measure your actual position on the earth true altitude such as a GPS but measure the air pressure and predict the altitude based on this measurement This is referred to as Pressure Altitude Pressure Altitude is adversely affected by the true altitude and to a lesser extent changes in the weather often referred to as barometric pressure changes Thus your Pressure Altitude can change without changing your position These changes can be as great as a thousand feet the changes due to weather are more pronounced at higher altitude To offset the difference between Pressure Altitude and True Altitude you must calibrate the device at a Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 12 ambient weather known altitude whenever convenient 6 8 Low Battery Indicator If the low battery indictor is present 4 or there is no LCD display it is time to change the battery 7 Glossary of Terms Accuracy Accuracy is defined as the ability of a measurement to match the actual value of the quantity being measured Beaufort Scale The Beaufort Scale is an empirical measure for describing wind speed
16. tained 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 hobbyist use 5 applications and uses that this product was not intended and 6 extreme acts of nature such as lightning strikes or floods This warranty covers only actual defects within the product itself and does not cover the cost of Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 16 ambient weather 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 13 Battery Recycle Statement Recycle Batteries Recycle your old batteries at one of the many collection sites in the U S and Canada To find the site nearest you visit www call2recycle org or call toll free 1 877 2 RECY CLE Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 17
17. to a stop and it is not imbalanced The meter contains a very Impeller appears imbalanced small magnet that responds to the earth s magnetic fields This does not affect the accuracy of the wind speed readings and only appears when breaking or accelerating This is normal for the vane to vibrate at high speed Do Vane is noisy at high speed not operate above 67 mph Above 67 mph the meter will display The LCD display will not operate below approximately 14 F Use the warmth of your body or environment for Display is dim or disappears use in cold weather conditions or Battery is dead Replace the battery Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 15 2 ambient weather 10 Accessories The following software and hardware accessories are available for this weather station at www AmbientWeather com Accessory Description Ambient Outdoors CR2032 3 Volt Lithium Standard CR2032 3 Volt Lithium Battery 1 battery Button Cell Battery 11 Liability Disclaimer Please help in the preservation of the environment and return used batteries to an authorized depot The electrical and electronic wastes contain hazardous substances Disposal of electronic waste in wild country and or in unauthorized grounds strongly damages the environment Reading the User manual is highly recommended The manufacturer and supplier cannot accept any responsibility for any incorrect readings and any consequences th
18. wind speed calibration uses a multiplier where Calibrated wind speed Wind Speed Multiplier x Measured wind speed Example If the measured wind speed is 10 mph and the calibrated wind speed is 13 mph the Wind Speed multiplier is 1 3 or 13 mph 1 3 x 10 mph Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 9 ambient weather I With the meter powered off press and hold the Units and then the O button at the same time to enter the calibration mode The number 1 will be displayed I Press the O button to continue with the wind speed calibration e XU units of wind speed will flash Press Set to adjust e Press Units button and x1 units of wind speed will flash Press Set to adjust V S To exit the calibration mode at any time press the O button and the meter will power off 6 7 3 Temperature Calibration I With the meter powered off press and hold the Units button and then the O button at the same time to enter the calibration mode Press the Units button and the number 2 will be displayed I Press the O button to continue with the temperature calibration e XU units of temperature will flash Press Set to adjust e Press Units button and x1 units of temperature will flash Press Set to adjust e Press Units button and x10 units of temperature will flash Press Set to adjust To exit the calibration mode at any time press the G button and the meter will power off 6 7 4 Humidit
19. y Calibration I With the meter powered off press and hold the Units button and then the O button at the same time to enter the calibration mode Press the Units button twice and the number 3 will be displayed I Press the O button to continue with the humidity calibration e x0 1 units of humidity will flash Press Set to adjust e x units of humidity will flash Press Set to adjust e Press Units button and x10 units of humidity will flash Press Set to adjust l l To exit the calibration mode at any time press the O button and the meter will power off 6 7 5 Barometer Calibration With the meter powered off press the Units button and then the O button at the same time to enter the calibration mode Press the Units button three times and the number 4 will be displayed i Press the Q button to continue with the barometer calibration x0 01 units of barometer will flash Press Set to adjust Press Units button and x0 1 units of barometer will flash Press Set to adjust Press Units button and x1 units of barometer will flash Press Set to adjust Press Units button and x10 units of barometer will flash Press Set to adjust l l t l V l To exit the calibration mode at any time press the O button and the meter will power off Version 1 2 Copyright 2015 Ambient LLC All Rights Reserved Page 10 ambient weather 6 7 6 Pressure Altitude Calibration 1 With the meter powered off press the Units button
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