Fine Offset Electronics WH32B Wireless weather station (Transmitter) User Manual

Fine Offset Electronics Co., Ltd. Wireless weather station (Transmitter)

User Manual

Version 1.0 Page 1 Wireless Internet Remote Monitoring Weather Station User Manual Table of Contents 1. Introduction ..................................................................................................................................... 2 2. Quick Start Guide ............................................................................................................................ 2 3. Getting Started ................................................................................................................................ 2 3.1 Parts List ................................................................................................................................. 2 3.2 Recommend Tools .................................................................................................................. 3 3.3 Outdoor Thermo-Hygrometer Sensor Set Up ......................................................................... 3 3.4 Mounting the Outdoor Thermo-Hygrometer Sensor .............................................................. 4 3.5 Indoor Thermo-Hygrometer-Barometer Transmitter .............................................................. 5 3.5 Best Practices for Wireless Communication ................................................................................. 6 3.6 ObserverIP Receiver ............................................................................................................... 6 3.6.1 Hardware Requirements ..................................................................................................... 6 3.6.2 Software Requirements ...................................................................................................... 7 3.6.3 ObserverIP Connections ..................................................................................................... 7 3.7 Finding the ObserverIP from your computer.......................................................................... 8 3.7.1 PC Users ............................................................................................................................. 8 3.7.2 Mac Users .......................................................................................................................... 9 5.7.3 Linux Users .......................................................................................................................... 10 3.7.3 Local Device Network Settings ........................................................................................ 11 3.8 Weather Network Settings .................................................................................................... 12 3.9 Viewing your Data on Wunderground.com .......................................................................... 15 3.9.1 Web Browser .................................................................................................................... 15 3.9.2 WunderStation iPad App .................................................................................................. 15 3.9.3 Mobile Apps ..................................................................................................................... 16 3.9.4 Station Settings ................................................................................................................. 17 3.9.5 Live Data .......................................................................................................................... 18 3.9.6 Calibration ........................................................................................................................ 19 4. Updating Firmware ....................................................................................................................... 21 5. Glossary of Terms ......................................................................................................................... 23 6. Specifications ................................................................................................................................ 24 6.1 Wireless Specifications ........................................................................................................ 24 6.2 Measurement Specifications ................................................................................................. 24 6.3 Power Consumption ............................................................................................................. 24 7. Troubleshooting Guide .................................................................................................................. 25 8. Liability Disclaimer ...................................................................................................................... 25 9. FCC Statement .............................................................................................................................. 26
Version 1.0 Page 2 1. Introduction Thank you for your purchase of the Wireless Internet Remote Monitoring Weather Station. The following user guide provides step by step instructions for installation, operation and troubleshooting. 2. Quick Start Guide Although the manual is comprehensive, much of the information contained may be intuitive. In addition, the manual does not flow properly because the sections are organized by components. The following Quick Start Guide provides only the necessary steps to install, operate the weather station, and upload to the internet, along with references to the pertinent sections. Required Step Description Section 1 Power up the outdoor thermo-hygrometer sensor 3.3 2 Power up the indoor thermometer-hygrometer-barometer sensor 3.4 3 Power up the ObserverIP, connect to your router and synchronize with the indoor and outdoor sensors 3.6 4 Calibrate the relative pressure to sea-level conditions (local airport) on the ObserverIP module 3.9.6 5 Register and upload to Weather Server 3.8 3. Getting Started The WS-1000-WiFi weather station consists of a ObserverIP receiver, an outdoor thermos-hygrometer sensor, and wireless thermo-hygrometer-barometer. 3.1 Parts List QTY Item Image 1 ObserverIP Receiver Dimensions (LxWxH): 3x2x1” 1 Indoor thermo-hygrometer-barometer transmitter (WH32B) Dimensions (LxWxH): 4.8” x 1.6” x 0.7” (122 x 42 x 18 mm)
Version 1.0 Page 3 QTY Item Image 1 Outdoor thermo-hygrometer transmitter (WH32E) Dimensions (LxWxH): 4.8” x 1.6” x 0.7” (122 x 42 x 18 mm) 1 Sensor screw (for hanging sensor) 1 Zip Tie (for hanging sensor) 1 5V DC Adaptor 1 Ethernet Cable 1 User manual 3.2 Recommend Tools  Precision screwdriver (for small Phillips screw on battery cover door and mounting bracket)  Drill for mounting bracket 3.3 Outdoor Thermo-Hygrometer Sensor Set Up Note: To avoid permanent damage, please take note of the battery polarity before inserting the batteries. The outdoor thermometer-hygrometer measures and displays the outdoor temperature and humidity to the ObserverIP receiver.
Version 1.0 Page 4 Remove the battery door on the back of the sensor by sliding off the battery door. Insert two AA batteries as shown in Figure 1, and close the battery door. Note that the temperature and humidity will be displayed on the LCD display. We recommend lithium batteries for cold weather climates, but alkaline batteries are sufficient for most climates. We do not recommend rechargeable batteries. They have lower voltages, do not operate well at wide temperature ranges, and do not last as long, resulting in poorer reception. Figure 1 3.4 Mounting the Outdoor Thermo-Hygrometer Sensor It is recommended you mount the remote sensor on a north facing wall, in a shaded area, at a height at or above the receiver. Direct sunlight and radiant heat sources will result in inaccurate temperature readings. Although the sensor is weatherproof, it is best to mount in a well protected area, such as an eve. Use a small nail or screw (included) to mount to a vertical surface, as shown in Figure 2.
Version 1.0 Page 5 Figure 2 The sensor can also be hung from a nylon zip tie (included) or string (not included). Figure 3 3.5 Indoor Thermo-Hygrometer-Barometer Transmitter The indoor thermometer, hygrometer and barometer measures and displays the indoor temperature, humidity and pressure and transmits this data to the ObserverIP receiver. Note: Do not install the thermo-hygrometer-barometer transmitter outside. This will cause errors
Version 1.0 Page 6 in the barometric pressure due to large variations in temperature (barometric pressure is temperature compensated for accuracy). Note that pressure readings made inside your home, business, or facility will correspond closely to the actual barometric pressure outside. Note: The thermo-hygrometer-transmitter transmits directly to the ObserverIP receiver. For best results, place between 5 to 20 feet from the ObserverIP receiver. Note: To avoid permanent damage, please take note of the battery polarity before inserting the batteries. Remove the battery door on the back of the sensor by sliding off the battery door. Insert two AA batteries as shown in Figure 1, and close the battery door. Note that the temperature, humidity and barometer will be displayed on the LCD display. 3.5 Best Practices for Wireless Communication Note: To insure proper communication, mount the remote sensor(s) upright on a vertical surface, such as a wall. Do not lay the sensor flat. Wireless communication is susceptible to interference, distance, walls and metal barriers. We recommend the following best practices for trouble free wireless communication. 1. Electro-Magnetic Interference (EMI). Keep the ObserverIP receiver several feet away from computer monitors and TVs. 2. Radio Frequency Interference (RFI). If you have other 433 MHz devices and communication is intermittent, try turning off these other devices for troubleshooting purposes. You may need to relocate the transmitters or receivers to avoid intermittent communication. 3. Line of Sight Rating. This device is rated at 300 feet line of sight (no interference, barriers or walls) but typically you will get 100 feet maximum under most real-world installations, which include passing through barriers or walls. 4. Metal Barriers. Radio frequency will not pass through metal barriers such as aluminum siding. If you have metal siding, align the remote and ObserverIP receiver through a window to get a clear line of sight. The following is a table of reception loss vs. the transmission medium. Each “wall” or obstruction decreases the transmission range by the factor shown below. Medium RF Signal Strength Reduction Glass (untreated) 5-15% Plastics 10-15% Wood 10-40% Brick 10-40% Concrete 40-80% Metal 90-100% 3.6 ObserverIP Receiver 3.6.1 Hardware Requirements 1. Broadband router 2. An “always-on” connection to the Internet. A high speed DSL or cable internet connection that maintains constant connection to the internet.
Version 1.0 Page 7 3.6.2 Software Requirements An IP scan tool is required to locate the ObserverIP on the network. 3.6.3 ObserverIP Connections Connect the ObserverIP receiver power jack to AC power with the power adapter (included), as shown in Figure 5, reference 10. Connect the OberverIP receiver to your router using the Ethernet cable (included), as shown in Figure 5, reference 8. Place the indoor and outdoor transmitters about 5 to 10 feet from the ObserverIP receiver and wait several minutes for the remote sensors to synchronize with the receiver. Once synchronized, the Indoor blue LED (Figure 4, reference 2) and Outdoor blue LED (Figure 4, reference 3) will be illuminated. Ref. LED Description 1 RF On when radio frequency receiver is operating properly 2 Indoor On when indoor sensor received 3 Outdoor On when outdoor sensor received 4 Server On when connected to Wunderground.com® internet hosting service 5 ACT Flashes when there is internet activity 6 Link Connected to the Internet (or router) 7 Power AC Power connected Figure 4
Version 1.0 Page 8 Ref. Description 8 LAN connection (connect to router) 9 Reset button 10 AC Power connection Figure 5 3.7 Finding the ObserverIP from your computer 3.7.1 PC Users To find the ObserverIP receiver, launch the IP Tools application The HostIP (your computers IP address) will be displayed. Press the OK button to continue. Figure 6 Select the Search button to find the ObserverIP on your local area network.
Version 1.0 Page 9 Figure 7 Select the ObseverIP module on your network as shown in Figure 8 (the field will be highlighted) and select the Open button (or double click this field) to view the ObserverIP module’s webpage within your browser. Alternately, you can type the IP address in your web browser address bar (example, Figure 9): Figure 8 Figure 9 You are now communicating directly to the ObserverIP and can proceed to Section 3.7. 3.7.2 Mac Users The file is compressed as a zip file and must be extracted to run. Select the Search button to find the ObserverIP on your local area network.
Version 1.0 Page 10 Figure 10 Select the ObseverIP module on your network as shown in Figure 10 (the field will be highlighted) and select the Open button (or double click this field) to view the ObserverIP module’s webpage within your browser. Alternately, you can type the IP address in your web browser address bar (example, Figure 9): Figure 11 You are now communicating directly to the ObserverIP and can proceed to Section 3.7. 5.7.3 Linux Users If you use an Apple or Linux operating system, download any commercially available IP scan tool, such as AngryIP Scanner and find the MAC address of the ObserverIP. The MAC address is a unique identifier for internet enabled devices. The MAC address will be printed on the bottom of the ObseverIP receiver. An example MAC address is 00:0E:C6:00:00:19. Figure 12 shows typical scan results. Locate the IP address of the ObserverIP by cross referencing the Mac address. In the example below, the IP address is 192.168.0.105.
Version 1.0 Page 11 Figure 12 Type the IP address you located from the IP Scan Tool into your web browser (example, Figure 13): Figure 13 You are now communicating directly to the ObserverIP and can proceed to Section 3.7. 3.7.3 Local Device Network Settings From your web browser, access the ObserverIP from the IP address obtained in the previous section. Select the Local Network tab to program the local network settings. Reference Figure 14: 1. IP Address. The default setting is receive automatically (DCHP), which is recommended. The network will assign an IP address. To statically assign an IP address, select Static from the pull down menu. This will prevent the IP address from changing each time you power up the ObserverIP receiver. 2. Static IP Address. If Static is selected as the IP address, enter the IP address you wish to access the ObserverIP device. 3. Static Subnet Mask. Default is 255.255.255.0. This should not be changed unless you are familiar with networking and subnet masking. 4. Static Default Gateway. This is typically the IP address of your router. 5. Static DNS Server. This is your DNS Server setting based on your router connection. 6. Server Listening Port. Default is 5000. Enter an integer between 1024 – 65535. If you made any Static IP Address changes (not recommended), to confirm these changes, select Apply and Reboot. Note: If you incorrectly set the static IP settings and can no longer access the ObserverIP, press the reset button on the back of the module.
Version 1.0 Page 12 Figure 14 3.8 Weather Network Settings Select the Weather Network tab to program the Weather Underground station settings. Reference Figure 15: Figure 15 Enter the Station ID and password obtained from Wunderground.com®. Select the Apply button to confirm changes. Note: How to create a Wunderground.com® account and station ID. 1. Join the Wunderground.com® Community. Visit: https://www.wunderground.com/members/signup.asp and sign up with Wunderground.com.
Version 1.0 Page 13 2. Join the Personal Weather Station (PWS) network. Visit: http://www.wunderground.com/personal-weather-station/signup or select More | Register Your PWS from the menu at the top of the WeatherUndeground.com website:
Version 1.0 Page 14 Enter the Station ID obtained and password you entered into the ObserverIP Weather Server panel. Note: If Wunderground.com is not updating, make sure the Station ID and Password are correct. The Station ID is all capital letters, and the password is case sensitive. The most common issue is substituting an O for 0 in the Station ID. Example, You live in Phoenix, AZ and you are station number 11: KAZPHOEN11, not KAZPH0EN11 K = USA station designation AZ = Arizona PHOEN = Phoenix 11= station 11 in Phoenix, AZ
Version 1.0 Page 15 3.9 Viewing your Data on Wunderground.com There are several ways to view your data on Wunderground: 3.9.1 Web Browser Visit: http://www.wunderground.com/personal-weather-station/dashboard?ID=STATIONID where STATIONID is your personal station ID (example, KAZSEDON12). Figure 16 3.9.2 WunderStation iPad App Visit: http://www.WunderStation.com to download the WunderStation iPad app.
Version 1.0 Page 16 Figure 17 3.9.3 Mobile Apps Visit: http://www.wunderground.com/download/index.asp for a complete list of Mobile apps for iOS and Android. Alternately, you can find your data on your mobile device’s web browser.
Version 1.0 Page 17 Figure 18 3.9.4 Station Settings Select Apply to confirm any of the changes in this section. 3.9.4.1 Wireless Transmitter Settings Weather Station Model Number: Enter our weather station model number. 3.9.4.2 Time Zone Setting Enter your local time zone and daylight Savings Time. 3.9.4.3 Daylight Savings Time Enter off if you live in Hawaii or Arizona, where DST is not observed. Enter on if you live anywhere else, even if you are currently observing standard time. 3.9.4.4 Units of Measure Enter your preferred units of measure for each parameter.
Version 1.0 Page 18 Figure 19 3.9.5 Live Data Select the Live Data tab to view your live data from the weather station. To freeze the live data updates, select the Stop Refresh button. Figure 20
Version 1.0 Page 19 3.9.6 Calibration Select the Calibration tab to view your calibration data from the weather station. Select the Apply button to confirm changes. Calibration of most parameters is not required, with the exception of Relative Pressure, which must be calibrated to sea-level to account for altitude effects. For more information on sea-level pressure calibration, please reference note (3) below. 3.9.6.1 Relative Barometric Pressure Calibration Example The following is an example of calibrating the relative pressure. Your results will vary. 1. The local relative pressure from TV, the newspaper or the internet for the official station in your area is 30.12 inHg. 2. From the Live Data panel, your absolute pressure (measured, and not corrected to sea-level) reads 28.90 inHg. 3. Reference Figure 21. Enter the following offset in the Calibration panel for Relative Pressure Offset: Relative Pressure Offset = 30.12 – 28.90 = 1.22 Figure 21
Version 1.0 Page 20 Parameter Type of Calibration Default Typical Calibration Source Temperature Offset Current Value Red Spirit or Mercury Thermometer (1) Humidity Offset Current Value Sling Psychrometer (2) ABS Barometer Offset Current Value Calibrated laboratory grade barometer REL Barometer Offset Current Value Local airport (3) (1) 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 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 adjust the ObserverIP receiver to match the fluid thermometer. (2) 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. (3) The ObserverIP receiver displays two different pressures: absolute (measured) and relative (corrected to sea-level). 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 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 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.
Version 1.0 Page 21 Note: The purpose of calibration is to fine tune or correct for any sensor error associated with the devices margin of error. Errors can occur due to electronic variation (example, the temperature sensor is a resistive thermal device or RTD, the humidity sensor is a capacitance device), mechanical variation, or degradation (contamination of sensors). 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 your weather station is to measure conditions of your surroundings, which vary significantly from location to location. 4. Updating Firmware You must own a PC to update the firmware. Sorry, Linux and Apple products are currently not supported. 1. Download the latest version of firmware 2. Important Note: Close all of other applications while running the firmware update. This will insure the upgrade process will not be interrupted. 3. Launch the IP Tools application as referenced in Section 3.7, and locate the ObserverIP on your network. Reference Figure 22. Select the Upgrade button to begin the firmware upgrade. As shown in this figure, the IP address of the ObserverIP is 192.168.0.7. Make a note of your IP address (your results will vary). Figure 22 4. Reference Figure 23. Select the Select File button, and browse to the location of the file you downloaded in Step 1.
Version 1.0 Page 22 Figure 23 5. Select the Upgrade Firmware button. Reference Figure 24. The dialog box will display Received a Read Request from the ObserverIP module. A green progress bar will provide you with the upgrade status. DO NOT OPERATE THE MOUSE OR KEYBOARD WHEN UPGRADING to prevent interruption of the upgrade. Figure 24 6. Once the firmware upgrade is complete, the dialog box will display Read session is completed successfully, as shown in Figure 25.
Version 1.0 Page 23 Figure 25 7. Wait about one minute for the ObserverIP module to reboot. You can now Exit the upgrade window, and access the module again, as referenced in Section 3.7. You may be required to enter some settings, so check all of the panels for completeness. 5. Glossary of Terms Term Definition Absolute Barometric Pressure Absolute pressure is the measured atmospheric pressure and is a function of altitude, and to a lesser extent, changes in weather conditions. Absolute pressure is not corrected to sea-level conditions. Refer to Relative Barometric Pressure. Accuracy Accuracy is defined as the ability of a measurement to match the actual value of the quantity being measured. Barometer A barometer is an instrument used to measure atmospheric pressure. Calibration Calibration is a comparison between measurements – one of known magnitude or correctness of one device (standard) and another measurement made in as similar a way as possible with a second device (instrument). 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 is maximally saturated with water. When the dew point remains constant and temperature increases, relative humidity will decrease. HectoPascals (hPa) Pressure units in SI (international system) units of measurement. Same
Version 1.0 Page 24 Term Definition as millibars (1 hPa = 1 mbar) Hygrometer A hygrometer is a device that measures relative humidity. Relative humidity is a term used to describe the amount or percentage of water vapor that exists in air. Inches of Mercury (inHg) Pressure in Imperial units of measure. 1 inch of mercury = 33.86 millibars Range Range is defined as the amount or extent a value can be measured. Relative Barometric Pressure Measured barometric pressure relative to your location or ambient conditions. Resolution Resolution is defined as the number of significant digits (decimal places) to which a value is being reliably measured. Thermometer A thermometer is a device that measures temperature. Most digital thermometers are resistive thermal devices (RTD). RTDs predict change in temperature as a function of electrical resistance. 6. Specifications 6.1 Wireless Specifications  Line of sight wireless transmission (in open air): 300 feet, 100 feet under most conditions  Update Rate: about one minute  Frequency: 915 MHz 6.2 Measurement Specifications The following table provides the specifications for the measured parameters. Measurement Range Accuracy Resolution Indoor Temperature 32 to 140 °F ± 2 °F 0.1 °F Outdoor Temperature -40 to 149 °F Lithium batteries -23 to 140 °F Alkaline batteries ± 2 °F 0.1 °F Indoor Humidity 1 to 99% ± 5% 1 % Outdoor Humidity 1 to 99% ± 5% 1 % Barometric Pressure 8.85 to 32.50 inHg ± 0.08 inHg (within range of 27.13 to 32.50 inHg) 0.01 inHg 6.3 Power Consumption  ObserverIP Receiver : 5V DC Adaptor (included)  Indoor Thermo-hygrometer-barometer sensor : 2xAAA batteries (not included)  Outdoor Thermo-hygrometer sensor: 2xAAA batteries (not included)
Version 1.0 Page 25 7. Troubleshooting Guide Problem Solution Wireless remote(s) not reporting in to ObserverIP Receiver. The maximum line of sight communication range is about 300’. Move the sensor assembly closer to the ObserverIP receiver. Install a fresh set of batteries in the remote sensor(s). Do not lay the sensor(s) flat. Make sure the remote sensors are not transmitting through solid metal (acts as an RF shield), or earth barrier (down a hill). Radio Frequency (RF) Sensors cannot transmit through metal barriers (example, aluminum siding) or multiple, thick walls. Move the ObserverIP receiver around electrical noise generating devices, such as computers, TVs and other wireless transmitters or receivers. Temperature sensor reads too high in the day time. Make certain that the sensor is not too close to heat generating sources or strictures, such as buildings, pavement, walls or air conditioning units. Make sure the thermo-hygrometer is mounted in a shaded area on the north facing wall. Use the calibration feature to offset installation issues related to radiant heat sources. Reference Section 3.9.6. Relative pressure does not agree with official reporting station Make sure you properly calibrate the relative pressure to an official local weather station. Reference Section 3.9.6 for details. Data not reporting to Wunderground.com® 1. Confirm your password is correct. It is the password you registered on Wunderground.com®. Your Wunderground.com® password cannot begin with a non-alphanumeric character (a limitation of Wundeground.com, not the station). Example, $oewkrf is not a valid password, but oewkrf$ is valid. 2. Confirm your station ID is correct. The station ID is all caps, and the most common issue is substituting an O for a 0 (or visa versa). Example, KAZPHOEN11, not KAZPH0EN11. 3. Make sure your time zone is set properly. If incorrect, you may be reporting old data, not real time data. 4. Check your router firewall settings. The ObserverIP sends data via Port 80. 8. 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
Version 1.0 Page 26 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 safety 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. FCC STATEMENT1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following twoconditions:(1) This device may not cause harmful interference, and(2) This device must accept any interference received, including interference that may causeundesired operation.2. Changes or modifications not expressly approved by the party responsible for compliance couldvoid the user’s authority to operate the equipment.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 protectionagainst harmful interference in a residential installation. This equipment generates, uses and canradiate radio frequency energy and, if not installed and used in accordance with the instructions,may cause harmful interference to radio communications. However, there is no guarantee thatinterference will not occur in a particular installation. If this equipment does cause harmfulinterference to radio or television reception, which can be determined by turning the equipment offand on, the user is encouraged to try to correct the interference by one or more of the followingmeasures:—Reorient or relocate the receiving antenna.—Increase the separation between the equipment and receiver.—Connect the equipment into an outlet on a circuit different from that to which the receiver isconnected.—Consult the dealer or an experienced radio/ TV technician for help.

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