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Envoy_front_cover D005.fm Page 2 Monday, November 11, 2002 7:43 AM FCC Part 15 Class B Registration Warning This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
WE GSG TOC D007.fm Page i Monday, November 11, 2002 7:44 AM Table of Contents Tab le o f C on t e n ts Welcome to the Weather Envoy! . . . . . . . . . . . . . . . . . . .1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Required for Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 All Weather Envoys: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Wireless Weather Envoy: . . . . . . . . . . . . . . . . . .
WE GSG TOC D007.fm Page ii Monday, November 11, 2002 7:44 AM Table of Contents Set Rain Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Set Temp & Hum Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Set Total Rain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Set Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Set Archive Interval . . . . . . . . . . . . . . . . . . . .
WELCOME TO THE WEATHER ENVOY! Contents Welcome to the We ather Envoy! Welcome to Davis Instruments’ Weather Envoy! The Weather Envoy provides a new and exciting way of getting your Davis weather station data into your Windows (95 or later) or Macintosh (OS X) computer. The Weather Envoy includes the data collection and logging functions of the Vantage Pro console, but in a smaller package that can be discreetly placed next to your computer.
HARDWARE INSTALLATION Optional Accessories O p t i o n al A c ce ss o r i es The following optional accessories are designed for use with your Envoy. They are available from your dealer or may be ordered directly from Davis. ▲ Telephone Modem Adapter (#6533) Allows transmission of data from the data logger using a modem.
HARDWARE INSTALLATION Preparing the Envoy Pr e pa r ing t h e E n voy Perform the following procedures to prepare your Envoy for operation. ▲ Install the Data Logger ▲ Install the Batteries ▲ Mount your Envoy ▲ Make the Envoy Connections ▲ Test using WeatherLink ▲ Setup the Envoy using WeatherLink Installing the Data Logger CAUTION: The WeatherLink data logger must be installed before you install the batteries! 1. Remove the three screws from the back of the Envoy case. 2.
HARDWARE INSTALLATION Preparing the Envoy 3. Carefully insert the data logger into the connector. Note:Be sure to push down firmly on the data logger to seat the connection. Data Logger Data Logger Cable Channel Installing the Data Logger 4. Rejoin the case halves, making sure the data logger cable passes through the cable channel. 5. Fasten using the three screws you previously removed.
HARDWARE INSTALLATION Preparing the Envoy 3. Insert the three AA-cell batteries, negative terminal (flat side) first. The Envoy will run through a brief self-test procedure. If the test is successful you will hear two (2) beeps. 4. Replace the battery cover on the case. Note: Operating on battery power alone, the Cabled Weather Envoy will run approximately 10 days and the Wireless Weather Envoy will run approximately 5 months.
HARDWARE INSTALLATION Preparing the Envoy Mounting the Envoy You can install your Envoy on your desktop or on the wall next to your computer. Note: Whenever you first install the Weather Envoy, place the antenna in a vertical position. If necessary, you can adjust the angle for best reception after it’s installed. Use this procedure for a wall installation. 1. Find the template located on the next page. 2.
HARDWARE INSTALLATION Local Computer Installation L o ca l Com p u te r I n s ta l la ti o n The instructions below explain how to make a typical local connection. Note that if you extend the cable run beyond 48’ (14.4 m), the software may have difficulty communicating with the station. Note: Mac Users - Refer to your WeatherLink for Mac OS X Getting Started Guide for additional installation instructions.
HARDWARE INSTALLATION Remote Computer Installation R em o t e C o m p u t er I n stal l at io n The illustration below shows a typical remote computer installation using a modem. This involves connecting the data logger to the Weather Envoy and to a modem at the station console site and connecting your computer’s modem to a phone line, which will allow you to dial the Weather Envoy .
HARDWARE INSTALLATION Remote Computer Installation Installing with a Remote Computer 1. Install and set up an internal or external modem (according to the instructions supplied by the manufacturer) for use with your computer. Make a note of the COM port used by the modem. You will need this information when entering serial port settings for the station. 2. At the Weather Envoy site, put the external modem in a location where it can connect to both the data logger and the phone jack.
SOFTWARE INSTALLATION AND SETUP Installing the Software S oft w a r e I n s ta l la t io n a nd S e t up Refer to the following procedure to install WeatherLink software on your computer. I n stal l i n g t h e S o ft wa r e Windows Computer 1. Place the Install Disk in your CD ROM drive. 2. The install program should start automatically.
SOFTWARE INSTALLATION AND SETUP Station Setup 3. Choose OK. The software saves the station, creates a directory and subdirectories for that station, and prompts you to indicate whether you want to enter the walkthrough procedure. About the Walkthrough The software includes a “Walkthrough” utility that steps you through most of the station setup and configuration procedures.
SOFTWARE INSTALLATION AND SETUP Station Setup Note:When you set the time and date, you will be prompted to clear your archive memory. If you do not clear archive memory, you may end up with data stored at an incorrect time or duplicate records. We recommend that you download before setting the time, unless you are creating a brand new station or just adjusting the time, so you may safely clear the archive memory.
SOFTWARE INSTALLATION AND SETUP Station Setup Station Configuration You may enter information which will help to identify a particular station and select a number of station-specific settings. 1. Choose Station Config from the Setup menu or press Ctrl-C. The Station Configuration dialog box appears. Station Configuration 2. Enter the following information: ▲ Name Enter the desired station name in this text box.
SOFTWARE INSTALLATION AND SETUP Station Setup Note: The “download.txt” file is written as a space-delimited file. The export feature available in the Browse Window produces a tab-delimited file. 3. When finished, choose OK. The software saves the station configuration settings. Serial Port To communicate with the data logger and station you must select the serial port you are using and enter the correct settings. 1. Choose Serial Port from the Setup menu or press CtrlI.
SOFTWARE INSTALLATION AND SETUP Station Setup ▲ Modem Initialization String The default modem initialization string should work in almost all cases: AT &F S7=60 E Q V X4. Before changing the modem string, see “Modem Initialization String” on page 34 for an explanation of what each part of the string means. ▲ After Connect Wait Controls the number of seconds the software waits after it has connected to a remote station before sending the first command.
SOFTWARE INSTALLATION AND SETUP Station Setup 3. Set Retransmit If you want your Weather Envoy to retransmit weather data, say to either a Vantage Pro console or a Weather Echo, turn Retransmit ON by selecting the transmitter ID number for the retransmitted signal. 4. Set Daylight Savings Select your local time zone from the list. You can manually turn on Daylight Savings by selecting On.
SOFTWARE INSTALLATION AND SETUP Station Setup 3. After selecting units of measure, choose OK. The software saves your choices. All information will be displayed in the units of measure you selected. Set Barometer You configure the barometer by entering the Weather Envoy’s current elevation and current barometric pressure. If you don’t know the elevation, there are many ways to find out.
SOFTWARE INSTALLATION AND SETUP Station Setup Set Rain Cal Based on the type of rain collector you selected in station configuration (See “Station Configuration” on page 13), the software automatically changes your station console’s rainfall calibration number to the correct setting. 1. Choose Set Rain Cal from the Setup menu. The software prompts you to confirm that you wish to change the rainfall calibration number. 2. Choose Yes. The software sets the rainfall calibration number on your station.
SOFTWARE INSTALLATION AND SETUP Station Setup Set Total Rain You may want to enter a total rainfall amount to reflect any rainfall which occurred during this season before you obtained your station or before you started using the software. 1. Choose Set Total Rain from the Setup menu. The Set Total Rain dialog box appears. 2. Enter the total rainfall amount and choose OK. The software saves the total rainfall amount to the console and to the station’s configuration file.
SOFTWARE INSTALLATION AND SETUP Station Setup 4. To indicate whether you want to clear your archive memory, choose Yes or No. If you choose Yes, the software clears your archive memory. Set Archive Interval You may choose to store data to the WeatherLink’s archive memory at an interval of 1, 5, 10, 15, 30, 60, or 120 minutes. This interval is known as the archive interval.
SOFTWARE INSTALLATION AND SETUP Station Setup Set Latitude and Longitude Note: Note:Latitude and longitude are a way of identifying your position on the earth. Latitude measures distance north or south of the equator. Longitude measures distance east or west of the Prime Meridian, an imaginary line running north and south through Greenwich, England. If you do not know your latitude and longitude, there are many ways to find out. Many atlases and maps include latitude and longitude lines.
SOFTWARE INSTALLATION AND SETUP Station Setup Set Alarms You may quickly set the alarm thresholds on the Weather Envoy using the software. See the Alarms section in this manual for more information on alarms and how they work. Note: The only way to clear an alarm in the Weather Envoy is to modify the threshold in the Alarm Setup screen to a value that would not cause an alarm, or to delete the value altogether. 1. Choose Set Alarms from the Setup menu or press Ctrl-A.
SOFTWARE INSTALLATION AND SETUP Station Setup 3. When finished entering alarm information, choose Set. The software sets the alarms on the station console to match the settings in this dialog box. Auto Download You may set up the software to automatically download data at specified times each day (the software must be running). 1. Choose Auto Download from the Setup menu or press Ctrl-J. The Auto Download dialog box appears.
ALARMS Station Setup 4. To set the time(s) at which the selected station should be downloaded, choose Download At. The Download At dialog box appears. 5. Enter the following information: ▲ Download Times Select the hour(s) at which the software should automatically download information from this station by clicking on the desired hour in the list. You may select as many download hours as you want; the software will download data from your station during each of the specified hours.
WEATHER DATA MEASURED & CALCULATED Wind Three special alarms ▲ ETo (Evapotranspiration) ETo is updated only once an hour, on the hour. If during a given hour the ETo Value exceeds the alarm threshold, the ETo alarm sounds at the end of that hour. This is true for daily, monthly, and yearly ETo alarms. You must have the optional Solar Radiation Sensor to use this alarm. ▲ Barometric Pressure The Weather Envoy allows you to set two barometric pressure alarms: a “rise” alarm and a “fall” alarm.
WEATHER DATA MEASURED & CALCULATED Humidity ▲ Wind chill Wind chill takes into account how the speed of the wind affects our perception of the air temperature. Our bodies warm the surrounding air molecules by transferring heat from the skin. If there’s no air movement, this insulating layer of warm air molecules stays next to the body and offers some protection from cooler air molecules. However, wind sweeps that comfy warm air surrounding the body away.
WEATHER DATA MEASURED & CALCULATED Dew-Point D ew - Poi n t Dew-point is the temperature to which air must be cooled for saturation (100% relative humidity) to occur, providing there is no change in water content. The dew-point is an important measurement used to predict the formation of dew, frost, and fog. If dew-point and temperature are close together in the late afternoon when the air begins to turn colder, fog is likely during the night.
WEATHER DATA MEASURED & CALCULATED Solar Radiation Sol a r R ad i a t i o n Note: Requires optional solar radiation sensor (#6450, included on Vantage Pro Plus weather stations). What we call “current solar radiation” is technically known as Global Solar Radiation, a measure of the intensity of the sun’s radiation reaching a horizontal surface. This irradiance includes both the direct component from the sun and the reflected component from the rest of the sky.
WEATHER DATA MEASURED & CALCULATED UV (Ultra Violet) Radiation TABLE A1: EPA SKIN PHOTOTYPES SKIN PHOTO- SKIN COLOR TANNING & SUNBURN HISTORY TYPE 1 - Never tans, always burns Pale or milky white; alabaster Develops red sunburn; painful swelling, skin peels 2 - Sometimes tans, usually burns Very light brown; sometimes freckles Usually burns, pinkish or red coloring appears; can gradually develop light brown tan 3 - Usually tans, sometimes burns Light tan; brown, or olive; distinctly pigmented R
WEATHER DATA MEASURED & CALCULATED UV (Ultra Violet) Radiation UV Dose and Sunburn - Use this plot to estimate the MED dose leading to sunburn. A person with Type II (Environment Canada) skin type might choose 0.75 MED as the maximum for the day; in contrast, a person with Type V (Environment Canada) Skin Type might consider 2.5 MEDs a reasonable dose for the day. NOTE: the Weather Envoy assumes a Fitzpatrick (Environment Canada) Skin Type of II.
WEATHER DATA MEASURED & CALCULATED EvapoTranspiration (ET) Ev a p o Tr a n s p i r a t i o n ( E T ) Note: Requires optional solar radiation sensor (#6450, included on Vantage Pro Plus weather stations). EvapoTranspiration (ET) is a measurement of the amount of water vapor returned to the air in a given area.
TROUBLESHOOTING GUIDE Communications Problems Tro u bl e s ho ot i n g G ui de The following section answers some of the most commonly asked questions about WeatherLink® and the Weather Envoy. Please consult this guide and the WeatherLink software Help before contacting Davis. Please see Contacting Davis Technical Support on page 35 for more information.
TROUBLESHOOTING GUIDE Finding the Correct Serial Port Finding t he Correct Seri al Port The software includes a procedure for locating the serial port to which your station is connected or determining whether that serial port is working. Using the Loopback command (as opposed to Test) will help you find the correct port and determine whether the serial port or the data logger is causing a communication problem. The loopback function will also detect and report the presence of any modems.
TROUBLESHOOTING GUIDE Modem Initialization String M o d e m I n i t i a li z a t i o n Str i n g The software automatically enters the following modem initialization string in the serial port settings dialog box, which should work with most modems: AT &F S7=60 E Q V X4. The individual components of the string have the following meaning. ▲ ·AT This string precedes all Hayes commands.
TROUBLESHOOTING GUIDE Contacting Davis Technical Support ? WeatherLink says “No new data to download” but I know there’s data there. What can I do? Weather Envoy is smart enough to send only data it hasn’t already sent to the computer. So, when you initiate a new download, the program will retrieve the first record after the last record shown in the WeatherLink’s Browse Window. Older data is stored in the logger as a backup.
Spec i f i ca t i o n s Operating Temperature . . . . . . . . . . . . . . . . . . . . . . Non-operating Temperature . . . . . . . . . . . . . . . . . . Current Draw, Cabled . . . . . . . . . . . . . . . . . . . . . . Current Draw, Wireless . . . . . . . . . . . . . . . . . . . . . +14° to +140°F (-10° to +60°C) -5° to +158°F (-20° to +70°C) 10 mA average, 15 mA peak at 4 to 6 VDC 0.77 mA average, 15 mA peak, (plus .
