Mandolyn Electronic Technology WS738 Weather Station Receiver User Manual WS738A3C DSN WS738A3
Mandolyn Electronic Technology Inc. Weather Station Receiver WS738A3C DSN WS738A3
Users Manual
DST Setting
User can manually select DST (daylight saving time)
feature when DCF is failed to receive
Scroll to Year mode using MODE
Press ALARM manually to enable
and disable DST
When DST is set ON, the DST symbol will appear
Date Setting:
Scroll to date mode using MODE
Press HOUR/+/MAX to set month
Press MINUTE/-/MIN to set date
Weekday is automatically determined
from the year/month/day setting
DATE, YEAR & ALARM SETTING
1
a
2
b
3
c
d
February will have either 28 or 29 days depending on the year setting
Year Setting
Scroll to YEAR mode using MODE
Press + or - key to adjust year
e
f
P.6
b c
ae
d
f
f
Note:
* It is not recommended unless DCF is failed to synchronize
* It is recommended to change the year/month/day information accordingly
2
1
3
battery installation
GETTING STARTED
remove battery cover
2 AA size batteries (WS738)
2 AA size batteries (WT440H)
(included)
Insert between terminals observing
proper polarity then replace cover
setting remote sensors
1
1
Press SET to start
House code will flash for 10 seconds
2
2
*Use a different house code if your weather station detects
othersignals from neighbouring sources
* Factory default: house code = 01 and channel = 01
3
3
4
4
5
Select house code (1-15) by pressing C/F key.
Press SET to confirm.
Channel will flash for 10 seconds
Select channel(1-4) by pressing C/F key.
Press SET to confirm.
Remote sensors for each receiver must be
set to the same house code. SET C/F
-
AA 1.5V
+
-
AA 1.5V +
13b5b 3a 5a
WS738
Wireless Weather Station
with weather forecast
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.
The WS738 is a weather station device that has
several weather related functions. The main
features are:
WT440H
remote sensor
Main Display Unit:
*
*
*
*
*
*
*
*
*
*
*
*
*
*
Remote Sensor WT440H:
*
*
*
*
*
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
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
GETTING STARTED button placement
1
7
6
8
9
2
3
4
5
MINUTE/-/MIN: shows minimum
temperature; adjusts clock, alarm, date &
year and temperature alarm values
SNOOZE/MODE: scrolls through Clock 1 & 2,
Alarm 1 & 2, Date & Year, and Temperature Alarm
(high & low) mode; snooze for alarm
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
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
HOUR/+/MAX: shows maximum
temperature; adjusts clock, alarm, date &
year and temperature alarm values
7
8
9
SET C/F
-
AA 1.5V
+
-
AA 1.5V +
6
Synchronization
1
1
2
2
3
4
SETUP
Automatic Learn Function:
Manual-Learn (Searching for Remote Signals):
Learn function executes automatically and runs for approximately 3
minutes when batteries are first installed in the receiver.
Press and hold CHN for 3 seconds to start
If a new remote sensor is added or if signal is lost (outdoor display
blinking), learn function must be executed again.
Within these 3 minutes, receiver picks up the temperature &
humidity signals from remote sensor and displays the readings.
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.
Auto/Manual Learn will not operate while the radio controlled clock is receiving DCF77 signals
*
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
Press + or - key to change the hour
(in one hour increments/decrements relative to Clock 1)
CLOCK SETTING Radio Control Clock
manual clock setting
1
i
ii
iii
iv
vi
v
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.
3
When the reception is complete, the Radio Tower
symbol will stop blinking and remain solid.
4
For better reception, place the clock away from metal
objects and electrical appliances (i.e. television, computer,
monitor, etc.) to minimize interference.
P.1
P.5 P.7
P.4
P.8
+
-
+
-
SET C/F
AA 1.5V
AA 1.5V
WS738
receiver
1
2
5
3
4
9
2
2
4
1
3
i
iii
iv
vi
ii
OUT
1
RF WIRELESS
WEATHER
TRANSMITTER
OUT
1
OUT
1
OUT
1
OUT
1
LOW BATTERY INDICATION:
Receiver: Low battery indicator will display continuously when batteries need replacing
Remote sensor: Low battery indicator will appear on sensor’s LCD along with a low battery
indication next to the corresponding channel on the receiver’s LCD
P.2
2
v
Alarm 1and Alarm 2 Setting
Scroll to Alarm1 mode (Alarm2 mode)
using MODE
Press HOUR to set hour
Press MINUTE to set minute
Press ALARM to toggle alarm on and off
When the alarm is set ON, the bell symbol will appear
When Alarm Sounds
or will flash
Press SNOOZE to snooze the alarm for 8 minutes.
After that the alarm will sound again.
Press ANY other key will shut off the alarm.
Without interruption, alarm will shut off automatically after one minute.
DATE, YEAR & ALARM SETTING
1
1
2
2
3
3
4
5
1
33
2
2 3
1
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.
Example:
1
2
3
4
5
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:
3
5
1
3
P.3
OUT
1
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
ii
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
15
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
16
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
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 user’s authority to operate this equipment.