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1. ambient weather Ambient Weather WS DP02 Digital Psychrometer with Temperature Humidity Heat Index Dew Point Wet Bulb Temperature and Clock User Manual ambient weather Table of Contents L O E E E E 2 4 Display Console Set UP eviriieirieisisnisinni d ienei aE O R NERE ETL RNE ia LAr DPS C O o LE T a E EAE EAS E Dipy E an A E A O ZA BS IVS E A A E E 22 Dew PontAlinn Set Mode oine E N 2 3 Pew Pom FU Aes est seis seins salad E seins Sas Some bons aise E E E 2 4 Temperature Wet Bulb Heat Index and Dew Point Display i eeeccceceeeeeeeeeeeeeeeeeaees 25 Cahibradon Adjustment Mode az4cncscrduwsctnssucancedcnseteadenetenduisevendeunanaedennedetdauecudadswsaiesacenenentcnnes Heat THe padri DISCUS O eeren EAE S Glosaro Taer A SPECICATION serat E A E E E E E E 3 L Measurement SPCCIHICAlIONS sescciincree uirri E aan rO eera Ori i Did OW COn i ON ee e E E E 6 Troubleshooting Guide 00000ooeooeoeeeenessssssssssssseeeterersssssssssssssseeteerresssssssssssseeeetreeesossssssssssseeeeeeeeo F A O E EEEE EE EEE EERE 8 9 Mm B amp B Ww LADUT D OO cetera cya rcs Seeder ental ceed E Wairau VT Oia OM onesie dco ssresacsets edi densawnensateewadaniewvan ants valduniausaacets Ueiduulaveansntawententaengeauiatwicautaerasants Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 1 ambient weather 1 Introduction Thank you for your purchase of the Ambient Weather WS DP02 Digital Psychrometer with Temperat2. a device that measures relative humidity Relative cn humidity is a term used to describe the amount or percentage of water vapor that exists in air Psychrometer A Psychrometer is an instrument used for measuring the water vapor content of the atmosphere a type of hygrometer It consists of two thermometers one of which the dry bulb is an ordinary glass thermometer while the other wet bulb has its bulb covered with a jacket of clean muslin which is saturated with distilled water prior to an observation A digital psychrometer differs in that it measures humidity directly rather than wet and dry bulb temperature and calculates wet bulb temperature Some HVAC analysis tables still use wet and dry bulb temperature Wet Bulb Temperature The wet bulb temperature is the lowest temperature that can be reached under current ambient conditions by the evaporation of water only it 1s the temperature felt when the skin is wet and exposed to moving air Wet bulb temperature is largely determined by both actual air temperature dry bulb temperature and humidity the amount of moisture in the air 5 Specifications 5 1 Measurement Specifications The following table provides specifications for the measured parameters Measurement Temperature 14 to 140 F Humidity 20 to 99 Note when temperature or humidity read out of range the display will read LL out of range low or HH out of range high 5 2 Power Consumption e 2xAA
3. 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 6 the products inability to receive a signal due to any source of interference or metal obstructions and 7 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 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 pst Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 10
4. 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 that 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 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 Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 9 ambient weather Warranty service
5. particularly with very hot dry air can be extremely hazardous The Heat Index Chart shaded zone above 105 F shows a level that may cause increasingly severe heat disorders with continued exposure or physical activity Temperature F 8 90 92 94 96 98 100 102 104 106 108 110 Relative Humidity E Caution ei Extreme Caution a Danger E Extreme Danger Effects of the heat index shade values Range F Caution 80 90 Fatigue is possible with prolonged exposure and activity Continuing activity could result in heat cramps activity could result in heat stroke Danger 105 130 Heat cramps and heat exhaustion are likely heat stroke is probable with continued activity Extreme Danger Over 130 Heat stroke is imminent 4 Glossary of Terms Accuracy Accuracy is defined as the ability of a measurement to match the actual value of the quantity being measured 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 Heat Index The Heat Index sometimes referred to as the apparent temperature is a Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 7 ambient weather Term a measure of how hot it really feels when relative humidity is factored with the actual air temperature Hygrometer A hygrometer is
6. I1 5V Alkaline or Lithium batteries not included e Battery life Approximately one year 6 Troubleshooting Guide If your question is not answered here you can contact us as follows 1 Email Support support ambientweather com 2 Live Chat Support www ambientweather com chat html M F 8am to 4pm Arizona Time Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 8 ambient weather 3 Technical Support 480 346 3380 M F 8am to 4pm Arizona Time Problem Solution ee Display console contrast is weak Replace console batteries with a fresh set of batteries console batteries with a fresh set of batteries Temperature or humidity is inaccurate Use the humidity and temperature calibration to match your calibration source Temperature Heat Index appear to read Since heat index values were devised for shady high conditions exposure to full sunshine can increase heat index values by up to 15 F Make sure you take your readings in a shaded area if possible 7 Accessories The following software and hardware accessories are available for this weather station at www AmbientWeather com Ambient Weather Humidity One step calibration kits for digital Calibration Kits hygrometers use salt slurry formula to accurately calibrate the indoor and outdoor hygrometers 8 Liability Disclaimer Please help in the preservation of the environment and return used batteries to an authorized depot The electrical and
7. rapidly press and hold the button To decrease the temperature press the ALARM button To decrease rapidly press and hold the ALARM button To confirm the temperature calibration press the SET button do not hold and the humidity will begin flashing 2 Humidity Calibration To increase the humidity to match your calibration source press the button To increase rapidly press and hold the button To decrease the humidity press the ALARM button To decrease rapidly press and hold the ALARM button To confirm the humidity calibration and return to normal mode press the SET button do not hold N Temperature Calibration Discussion Temperature errors can occur when a sensor is placed too close to a heat source such as a building structure the ground or trees To calibrate temperature we recommend a mercury or red spirit fluid thermometer Bi metal dial and other digital thermometers 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 24 hours Compare this temperature to the fluid thermometer and adjust the console to match the fl
8. s the button 2 1 Set Mode To set the time and units of measure press and hold the SET button 3 seconds or longer and let go of the SET button 1 12 24 Hour 12 Hr or 24 hour will begin flashing Press the button to switch between 12 hour and 24 hour display mode Press the SET button do not hold to advance to the next setting 2 Hour of Day The hour of day will begin flashing Press the button to increase the hour and the ALARM button to decrease the hour Press the SET button do not hold to advance to the next setting 3 Minute of Day The minute of day will begin flashing Press the button to increase the minute and the ALARM button to decrease the minute Press the SET button do not hold to advance to the next setting 4 Temperature Units of Measure The F or C icon will begin flashing Press the button to switch between F and C Press the SET button do not hold to exist the Set Mode 2 2 Dew Point Alarm Set Mode To set the Dew Point Alarm press and hold the ALARM button for 3 seconds or greater and the dew point alarm set point will begin flashing To increase the dew point alarm set point press the button To increase rapidly press and hold the button To decrease the dew point alarm set point press the ALARM button To decrease rapidly press and hold the ALARM button To confirm the Alarm setting and return to normal mode press the SET button do not hold 2 3 Dew Point Alarm To t
9. uid thermometer N Humidity Calibration Discussion 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 installation 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 one step humidpak calibration kits reference Section 7 3 Heat Index Safety Discussion The following section is courtesy of the United States National Weather Service Office of Climate Water and Weather Services The Heat Index sometimes referred to as the apparent temperature is given in degrees Fahrenheit The Heat Index is 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 Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 6 ambient weather full sunshine can increase heat index values by up to 15 F Also strong winds
10. ure Humidity Heat Index Dew Point Wet Bulb Temperature and Clock 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 wsdp02 2 4 Display Console Set Up 1 Remove the battery door on the back of the sensor as shown in Figure 1 Figure 1 Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 2 ambient weather 2 Insert two AAA batteries as shown in Figure 2 and close the battery door Figure 2 3 Close the battery door as shown in Figure 3 Figure 3 Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 3 ambient weather 2 4 1 Display Console Layout X Note The following illustration shows the full segments of the LCD for description purposes only and will not appear like this during normal operation Figure 4 1 Dew Point Alarm 5 Alarm Button also serves as button 2 Temperature Wet Bulb Temperature Heat Index or 6 Button Dew Point F or C 7 SET Button 3 Relative Humidity 8 TEMP WET BULB HEAT INDEX DEW 4 Time of Day HH MM SS POINT Indicator Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 4 2 ambient weather 2 Display Settings X Note The console has three buttons for easy operation SET button button and ALARM button which also serves a
11. urn on the Dew Point Alarm press do not hold the ALARM button The alarm icon BT will appear To turn off the alarm press the ALARM button again and the alarm icon will disappear 2 4 Temperature Wet Bulb Heat Index and Dew Point Display Press the SET button do not hold to switch the display between temperature heat index and dew point or temperature wet bulbDheat index gt dew point gt temperature 2 5 Calibration Adjustment Mode The purpose of calibration is to fine tune or correct for any sensor error associated with the devices margin of error The measurement can be adjusted from the console to calibrate to a known source Calibration is only useful if you have a known calibrated source you can compare it against and is optional This section discusses practices procedures and sources for sensor calibration to reduce manufacturing and degradation errors Do not compare your readings obtained from sources such as the internet radio television or newspapers The purpose of the heat index monitor is to measure conditions of your surroundings which vary significantly from location to location Version 1 0 Copyright 2012 Ambient LLC All Rights Reserved Page 5 ambient weather To calibrate temperature and humidity press and hold the SET button for 9 seconds and the temperature will start flashing 1 Temperature Calibration To increase the temperature to match your calibration source press the button To increase
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