•
Avoid placing the World Time Center where it can be exposed to sudden changes in temperature, i.e. direct
sunlight, extreme cold and wet/moist conditions since the design of this product is for indoor use only. This will help
to avoid any inaccurate readings and any possible damage to the unit.
•
Should the World Time Center be exposed to extreme and sudden temperature changes, it will lead to rapid
changes in its readings and thereby reduce its accuracy.
•
Should the World Time Center be moved to another location that is significantly higher or lower than its initial
standing point (e.g. from the ground floor to the upper floors of a house), then inaccurate readings may occur. In
such a case either reset the units or discard the readings of the weather forecast for the next 12 to 24 hours. By
doing so, this will allow sufficient time for operation at a constant altitude, thus enabling a more accurate forecast.
Care and Maintenance
•
Avoid placing the units in places prone to extreme temperatures, vibration and shock as these may cause damage
and inaccurate readings.
•
When cleaning the World Time Center and Temperature Sensor's displays and casings, use a soft damp cloth
only. Do not use solvents or scouring agents as they may mark the LCDs and casing.
•
Do not submerge the units in water.
•
Immediately remove all low powered batteries to avoid leakage and damage. Replace only with new batteries of
the recommended size.
•
Do not make any attempts to repair the units. Return them to their original point of purchase for repair by a
qualified engineer. Opening and tampering with the units may invalidate their guarantee.
Battery Change
For best performance, batteries to all units should be replaced when the low battery indicator is displayed on the LCD of
the World Time Center and the Outdoor temperature sensor or at least once a year to maintain maximum running
accuracy.
Please help in the preservation of the environment and return used up batteries only to an
authorized depot.
Specifications
Radio controlled time signal
:
WWVB
Recommended operating temperature
World Time Center
:
0°C to +50°C
LCD contrast
:
8 levels
Temperature measuring range
Indoor
:
+14ºF to +158ºF with 0.2ºF resolution
(-9,9°C to +59,9°C with 0.1°C
resolution)
(“OFL“ displayed if outside this range)
Outdoor
:
-22ºF to +158ºF with 0.2ºF resolution
(-29.9°C to +69,9°C with 0.1°C
resolution)
(“OFL“ displayed if outside this range)
Relative indoor humidity range
:
19% to 96% with 1% resolution
(Display “- - -” if outside this range)
Data checking intervals
Indoor Temperature
:
Every 20 seconds
Indoor Humiditiy
:
Every 1 minute
Outdoor temperature
:
Every 10 seconds
Power Supply
World Time Center
:
3 x 1.5V Battery Typ AA, IEC LR6
Temperature Sensor
:
2 x 1.5V Battery Typ AA, IEC LR3
Dimensions (L x W x D)
World Time Center
:
375 x 30 x 250mm
Temperature Sensor
:
56 x 24 x 80mm
Liability Disclaimer
•
The manufacturer and supplier cannot accept any responsibility for any incorrect readings and any consequences
that occur should any inaccurate reading take place.
•
This product is not to be used for medical purposes or for public information.
•
This product has been designed for strict use in the home as an indicator of the future weather and is not 100%
accurate. Weather forecast readings given by this product should be taken only as an indication and not as being
totally accurate.
•
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 consent of the manufacturer.
Subject Index
Here the interested user will find a number of additional informations regarding the function of this Wallclock
Weather Station. Their knowledge however is not necessary for efficient operation of this system.
Clock, Radio Controlled
The time base for radio controlled time and date is a operated by the NIST radio station WWVB in Ft. Collins, Colorado.
WWVB broadcasts are used by millions of people throughout the United States to synchronize electronic products like
clocks, clock radios and wristwatches. WWVB continuously broadcasts time and frequenzy signals at 60kHz and the
time information received and displayed is absolutely accurate regardless of summer or wintertime.
Software Operations
•
WWVB Time Signal
Every full hour, after every setup or reset and after leaving the programming mode the software of the World Time
Center will start a reception of the WWVB time signal.
•
Indoor Temperature and Humidity/Air Pressure
The software of the World Time Center will perform measurements of the current indoor temperature every 20
seconds, the current indoor humidity every 1 minute and the current air pressure every 1 minute. In programming
mode and while any one key is pressed no WWVB reception will take place.
•
Battery
After setup, reset or after every outdoor data reception a low-battery detection is started by the software of the
World Time Center. If the batteries run low, a low battery indication flag is shown on the display.
Weather Symbols
For every sudden or definite change in air pressure, the weather symbols will update accordingly to represent this
change. This means that the icons will not change if there is no noticable movement in the weather. If the symbols do not
change it simply means that either
1)
the weather has not changed or
2)
the weather change has been so slow that is has not been possible to read when the actual change had taken
place.
The weather icons displayed forecast the future weather in terms of getting better or worse and not necessarily sunny or
rainy as each icon indicates. E.g., if the current weather is cloudy and the rain icon is displayed, it does not mean that
the product is faulty because it is not raining. It simply means that the air pressure has dropped and the weather is
expected to get worse but not necessarily raining.
Weather Tendency
Because of the combination of weather icons and weather tendency arrows, the World Time Center can also show how
the weather has changed and is expected to change. E.g., if the tendency arrow pointing downwards is displayed along
with the cloud and sun symbols then the last noticeable change in the weather was when it was sunny (sun icon only).
This means that the next change in weather will show the rainy icon since the tendency indicator is pointing downwards..
The weather tendency indicator arrow will remain on the LCD regardless of the weather. E.g., if the current weather is
raining and the indicator is pointing downwards, it means that the weather will remain poor. If the weather is sunny and
the indicator is pointing upwards, it means that the weather is expected to continue being fine.
