1 2 3 4 5 6 7 8 9 OWNERS MANUAL Congratulations on your purchase of this weather station, WS738. Please take the time to read and understand this manual so you can begin to enjoy the convenience and features this product has to offer. WS738 Wireless Weather Station with weather forecast The WS738 is a weather station device that has several weather related functions. The main features are:
Main Display Unit:
Auto synchronizing radio controlled clock (DCF-
77) Perpertual Calendar Local temperature and humidity display Receives and monitors temperature and humidity from up to 4 remote sensors via RF technology of 433MHz Maximum/minimum temperature records Temperature and humidity trend indicator Temperature history chart Temperature alarm (for local and one out channel) Weather forecast display Moon phase symbols Sunrise/ Sunset time display Backlight User-selectable C or F Battery: 2 x AA size
Remote Sensor WT440H:
Splash proof design with LCD Temperature display in user-selectable C or F Humidity display Transmission range: up to 40 meters Battery: 2 x AA size 1 OUT WS738 receiver WT440H remote sensor P.1 1 Radio Control Clock CLOCK SETTING The Ws738 is designed to automatically synchronize its calendar clock once it is brought within range of 1500km of the Frankfurt DCF77 radio signal. When the WS738 is within this range, its radio-control mechanism will override all manual settings. 2 When receiving radio signal, the Radio Tower symbol starts to blink. A complete reception generally takes several minutes, depending on the strength of the radio signal. 2 symbol will stop blinking and remain solid. 3 When the reception is complete, the Radio Tower 4 For better reception, place the clock away from metal objects and electrical appliances (i.e. television, computer, monitor, etc.) to minimize interference. manual clock setting ii iii i Clock 1 Setting:
Press and hold MODE for 3 seconds to enter the clock setting mode
(the CLOCK 1 symbol appears and the time will flash) Press HOUR to set the hour and MINUTE to set the minute;
Press ALARM/(C/F) during clock setting, to change between 12 and 24 hour display. This also will end clock setting. Press MODE or do not press any key for 1 minute to finish clock setting. Clock 2 Setting:
Scroll to Clock 2 mode using MODE v Press + or - key to change the hour vi
(in one hour increments/decrements relative to Clock 1) iv ii vi i iv v iii GETTING STARTED SNOOZE/MODE: scrolls through Clock 1 & 2, Alarm 1 & 2, Date & Year, and Temperature Alarm
(high & low) mode; snooze for alarm HOUR/+/MAX: shows maximum temperature; adjusts clock, alarm, date &
year and temperature alarm values button placement 1 9 MINUTE/-/MIN: shows minimum temperature; adjusts clock, alarm, date &
year and temperature alarm values 2 ALARM/(C/F): toggles between C and F, 12 and 24 hour format, Alarm 1 & 2 on and off; disables (resets) high & low temperature alarms; disable/enable backlight CHN: scrolls through remote channels (1 to 4); scrolls through local and remote channels (1 to 4) in (high &
low) temperature alarm mode; set sunrise/sunset zone; activate learn process 9 1 OUT SET: enter into setting mode and confirm the values during setting. C/F: change value of channel and house code during setting. Select between C or F. Battery compartment LCD display 4 3 5 6 7 SET C/F
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8 GETTING STARTED battery installation 1 2 3 4 remove battery cover 2 AA size batteries (WS738) 2 AA size batteries (WT440H)
(included) Insert between terminals observing proper polarity then replace cover SET C/F
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LOW BATTERY INDICATION:
Receiver: Low battery indicator will display continuously when batteries need replacing Remote sensor: Low battery indicator will appear on sensors LCD along with a low battery indication next to the corresponding channel on the receivers LCD 1 2 3 setting remote sensors 3a 5a 3b 5b 1 Press SET to start House code will flash for 10 seconds Select house code (1-15) by pressing C/F key. Press SET to confirm. Remote sensors for each receiver must be set to the same house code. Channel will flash for 10 seconds Select channel(1-4) by pressing C/F key. Press SET to confirm. 4 5
*Use a different house code if your weather station detects othersignals from neighbouring sources
* Factory default: house code = 01 and channel = 01 1 OUT SET C/F
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Synchronization SETUP Automatic Learn Function:
Learn function executes automatically and runs for approximately 3 minutes when batteries are first installed in the receiver. Within these 3 minutes, receiver picks up the temperature &
humidity signals from remote sensor and displays the readings. RF WIRELESS 1 OUT WEATHER TRANSMITTER 2 1 OUT Manual-Learn (Searching for Remote Signals):
If a new remote sensor is added or if signal is lost (outdoor display blinking), learn function must be executed again. Press and hold CHN for 3 seconds to start 2 Beep sound indicates that learn function has started
'Channel' symbol will flash and unit will beep as each remote sensor is detected Temperature & humidity readings of remote sensor displays on the receiver. 3 4 1 1 OUT Auto/Manual Learn will not operate while the radio controlled clock is receiving DCF77 signals 1 2 1 2 3 4
P.2 P.3 P.4 DATE, YEAR & ALARM SETTING f b Scroll to YEAR mode using MODE Press + or - key to adjust year Date Setting:
a Scroll to date mode using MODE b Press HOUR/+/MAX to set month c Press MINUTE/-/MIN to set date Weekday is automatically determined d from the year/month/day setting February will have either 28 or 29 days depending on the year setting Year Setting e f DST Setting User can manually select DST (daylight saving time) feature when DCF is failed to receive 1 Scroll to Year mode using MODE 2 Press ALARM manually to enable and disable DST 3 When DST is set ON, the DST symbol will appear Note:
* It is not recommended unless DCF is failed to synchronize
* It is recommended to change the year/month/day information accordingly DATE, YEAR & ALARM SETTING 1 5 Alarm 1and Alarm 2 Setting 1 Scroll to Alarm1 mode (Alarm2 mode) using MODE 2 Press HOUR to set hour 3 Press MINUTE to set minute 4 Press ALARM to toggle alarm on and off 5 When the alarm is set ON, the bell symbol will appear When Alarm Sounds 1 or will flash 2 Press SNOOZE to snooze the alarm for 8 minutes. After that the alarm will sound again. 3 Press ANY other key will shut off the alarm. Without interruption, alarm will shut off automatically after one minute. 1 3 3 2 2 3 4 a e d c f 3 2 1 SUNRISE/ SUNSET TIME DISPLAY This weather station has state-of-art feature of Sunrise/ Sunset time display. The Sunrise/ Sunset time will display corresponding to your selected location. Please follow the procedures as below:
1 2 3 4 5 Enter into clock setting mode ( Press and hold MODE for 3 seconds to enter the clock setting mode ) Identify which zone you are located at
(see the zone map at last page) Set the Zone code with CHN key Daytime duration will change according to selected zone code and date. Sunrise and Sunset times follows to date. 1 3 Example:
3 5 P.8 P.5 P.6 P.7 MOON PHASE The moon phase is automatically updated according to the year/month/day. Moon Phase Display 1 New Moon 2 3 4 5 6 7 8 Young Crescent First Quarter Waxing Gibbous Full Moon Waning Gibbous Last Quarter Old Crescent Check Local Temperature & Humidity TEMPERATURE & HUMIDITY DISPLAY
Check Remote Temperature & Humidity A After insert batteries, local temperature &
humidity will display in alternate pattern. Press CHN to toggle between Channel 1, 2, 3 and 4. Temperature and humidity readings will alternate on the receiver.
Toggle between C and F by pressing C/F in either Clock1 or Clock2 mode. C or F Temperature Display B Min and Max Temperature & Humidity C D Press MIN in Clock1 mode to display minimum temperature and humidity Press MAX in Clock1 mode to display maximum temperature and humidity B D Note:
Min/Max readings are automatically cleared daily at 00:00 Temperature & humidity trend The trend indicator shows the trend of temperature & humidity determined by the particular sensor in the past half hour interval. Arrow Indicator Trend Rising Steady Falling TEMPERATURE ALARM You can set high temperature or low temperature alarms for one local and one for one remote channel 1 5 Local temperature alarm 1 2 3 4 Scroll to local temperature alarm mode by using MODE The default value 14C or existing preset will flash Press + or - key to set the temperature limit value Press ALARM key continuously to scroll and select the high temperature alarm, low temperature alarm or disable the alarm function
Press MODE to finish 5 1 3 3 4 2 C A The default value 14C or existing preset will flash Press + or - key to set the temperature limit value 5 Outdoor temperature alarm 1 2 3 4 Scroll to remote channel temperature alarm mode by using MODE 2 1 6 2 3 4 Press ALARM key continuously to scroll and select the high temperature alarm, low temperature alarm or disable
the alarm function Press CHANNEL to select one desired channel of transmitter Press MODE to finish 5 6 when temperature alarm sounds
a Press any key to stop temperature alarm; or If no key is pressed, the temperature alarm will automatically stop b itself after one minute. c Once triggered, temperature alarm comes on as a distinctive sound, different to that of Alarm1 and Alarm2. 1 4 3 5 It is to alert that the temperature has exceeded the preset temperature limit. WEATHER DISPLAY weather forecast symbols This weather station is capable of detecting barometric pressure changes, and based on the data collected, can predict the weather for the next 12 to 24 hours. The effective range covers an area of 30 50km. Sunny Cloudy Raining Snowing Freeze Warning Storm Alert OR
<flashing snow>
<flashing>
Storm Alert
* Storm symbol will flash to warn of thunderstorm.
* It is activated when pressure falls/rises and temperature plunges. About Freeze Warning
* Snow symbol will flash to warn of 'freezing'.
* Activated when Channel 1's temperature is between -1.9 C and +2.9 C
* Snow will appear solid if and when Channel 1's temperature falls below -1.9 C. Note:
* Sun / Moon symbol display according to sunset/ sunrise time.
* Initially, the weather will be cloudy
* Remote sensor Channel 1 will be used for weather indication. P.9 P.10 P.11 P.12 WEATHER DISPLAY REMARKS:
* After setting up, reading for weather forecasts should be discarded for the next 12-24 hours. This will allow sufficient time for the Weather Station to operate at a constant altitude and therefore result in a more accurate forecast.
* Common to weather forecasting, absolute accuracy cannot be guaranteed. The weather forecasting feature is estimated to have an accuracy level of about 75% due to the varying areas the Weather Station has been designed for use in.
* If the Weather Station is moved to another location significantly higher or lower than its initial standing point (e.g from ground floor to 1st floor of a house), remove the batteries and reinsert them after about 30 seconds. By doing this, the Weather Station will not make mistake of new location being a possible change in air pressure. Again, discard the weather forecasts for the next 12-24 hours as this allow time for operation at a constant altitude. PRESSURE HISTORICAL BARGRAPH The bar graph lets you see the pressure trend over a period of 12 hours in 3-hour intervals. BACKLIGHT This Weather Station is equipped with Backlight function. Pressing any key will turn on the backlight function. To save energy, you can select to Turn Off the backlight by executing the following steps:
Turn Off Backlight Steps 1. Use MODE key scrolling to Date display 2. Press ALARM key Afterwards, the backlight will not be activated even if pressing any key Reactivate Backlight Repeat the above same steps to reactivate the backlight function. Afterwards, pressing any key will turn on the backlight TROUBLESHOOTING problem solution i ii iii iv Cannot receive radio control DCF-77 signals to update the clock. The temperature measurement of remote sensor and receiver does not match. Temperature reading of outdoor remote sensor seems to high. Receiver is no longer receiving remote sensor signals or display i ii iii iv Place the clock away from metal objects or electricalappliances such as TVs, computers, monitors, etc. Wait for about 1-2 minute to ensure the remote sensor and receiver are in phase. Otherwise, re-synchronize receiver by holding CHNfor 3 seconds until a beep is heard. Ensure the remote sensor is out of direct sunlight, and away from sources of heat.
- Repeat the learning procedures.
- Temperature may be below -30C.
- Batteries in remote sensor may need changing.
- Move remote sensor closer to the receiver.
- Make sure remote sensor is away from sources of electrical disturbance. SPECIFICATIONS Weather Station Receiver WS738 Battery Type: 2 X 1.5V AA batteries Operation Temp:
-5C to +50C
-9.9C to +55C Temp. Range:
Measurement Accuracy: Max. +/- 1C within measuring range of 0 to 40C Resolution: 0.1C Humidity Range: 25% to 90% RH C to +70C Weather Station Transmitter WT440H Battery Type: 2 X 1.5V AA batteries Operation Temp.: -20C to +60C Temp. Range: -30 Temperature Resolution: 0.1C for above -10C /
1C for below -10C Measurement Accuracy: Max. +/- 1C within measuring range of 0 to 40C Humidity Range: 25% to 90% RH Transmission Frequency: 433.92 MHz Transmission Range: 40 meters (in open area) P.13 P.14 P.15 P.16 INSTRUCTION TO THE USER 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. This equipment generates, uses and can radiate 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 that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
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 is connected. Consult the dealer or an experienced radio/TV technician for help. In order to maintain compliance with FCC regulations, shielded cables must be used with this equipment. Operation with non-approved equipment or unshielded cables is likely to result in interference to radio and TV reception. The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the users authority to operate this equipment.