User's Manual

SPECIFICATIONS
Weather Station Receiver WS738
Battery Type: 2 X 1.5V AA batteries
Operation Temp:
Temp. Range:
-5°C to +50°C
-9.9°C to +55°C
Measurement Accuracy: Max. +/- 1°C
within measuring range of 0 to 40°C
Resolution: 0.1°C
Humidity Range: 25% to 90% RH
Weather Station Transmitter WT440H
Battery Type: 2 X 1.5V AA batteries
Temp. Range: -30
Operation Temp.: -20°C to +60°C
°C to +70°C
Temperature Resolution: 0.1°C for above -10°C /
1°C for below -10°C
Measurement Accuracy: Max. +/- 1°C within
measuring range of 0 to 40°C
Humidity Range: 25% to 90% RH
Transmission Frequency: 433.92 MHz
Transmission Range: 40 meters (in open area)
BACKLIGHT
i
i
ii
ii
iii
iii
iv
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.
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
problem
solution
TROUBLESHOOTING
P.9 P.10
P.16
P.12
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
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.
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.
weather forecast symbols
WEATHER DISPLAY
Raining
Freeze
Warning
Storm Alert
Snowing
Sunny
Cloudy
<flashing snow>
OR
<flashing>
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.
WEATHER DISPLAY
PRESSURE HISTORICAL BARGRAPH
The bar graph lets you see the pressure trend over a period of 12 hours
in 3-hour intervals.
Moon Phase Display
MOON PHASE
The moon phase is automatically updated
according to the year/month/day.
New Moon
1
Young Crescent
2
First Quarter
Waxing Gibbous
Full Moon
Waning Gibbous
Last Quarter
Old Crescent
8
7
6
5
4
3
Check Remote Temperature & Humidity
Check Local Temperature & Humidity
C or F Temperature Display
Min and Max Temperature & Humidity
A
*
*
B
C
D
TEMPERATURE & HUMIDITY DISPLAY
Press CHN to toggle between Channel 1, 2, 3 and 4.
Temperature and humidity readings will alternate
on the receiver.
After insert batteries, local temperature &
humidity will display in alternate pattern.
Toggle between C and F by pressing
C/F in either Clock1 or Clock2 mode.
Press MIN in Clock1 mode to display
minimum temperature and humidity
Press MAX in Clock1 mode to display
maximum temperature and humidity
Note:
Min/Max readings are
automatically cleared
daily at 00:00
The trend indicator shows the trend of temperature & humidity
determined by the particular sensor in the past half hour interval.
Arrow Indicator
Rising
Steady
Falling
Trend
Temperature & humidity trend
D
C
A
B
P.13 P.14 P.15
Press ALARM key continuously to scroll and select the high
temperature alarm, low temperature alarm or disable the alarm function
Press + or - key to set the temperature limit value
Press MODE to finish
The default value 14C or existing preset will flash
a
*
2
b
5
c
3
4
when temperature alarm sounds
Press any key to stop temperature alarm; or
If no key is pressed, the temperature alarm will automatically stop
itself after one minute.
Once triggered, temperature alarm comes on as a distinctive
sound, different to that of Alarm1 and Alarm2.
It is to alert that the temperature has exceeded the preset temperature limit.
Outdoor temperature alarm
1 5
1
*
P.11
Scroll to remote channel temperature alarm mode by using MODE
Press + or - key to set the temperature limit value
Press CHANNEL to select one desired channel of transmitter
The default value 14C or existing preset will flash
1
2
5
6
3
4
*
Press MODE to finish
33
4
1 5
2
Press ALARM key continuously to scroll and select the high
temperature alarm, low temperature alarm or disable
the alarm function
5
2
4
33
4
1 6
2
Scroll to local temperature alarm mode by using MODE
1
TEMPERATURE ALARM
You can set high temperature or low temperature alarms for one local
and one for one remote channel
Local temperature alarm