Mandolyn Electronic Technology WS738 Users Manual

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:

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

WS738

Wireless Weather Station

with weather forecast

WS738

receiver

P.1

OUT

WT440H

remote sensor

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

MINUTE/-/MIN: shows minimum

temperature; adjusts clock, alarm, date & year and temperature alarm values

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

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

P.2

button placement

OUT

SET

C/F

AA 1.5V

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

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

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.

*Use a different house code if your weather station detects othersignals from neighbouring sources * Factory default: house code = 01 and channel = 01

P.3

battery installation

SET

C/F

AA 1.5V

setting remote sensors

3a 5a

13b5b

OUT

SET

C/F

AA 1.5V

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

OUT

WEATHER

TRANSMITTER

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

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

P.4

Synchronization

OUT

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.

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.

When the reception is complete, the Radio Tower

symbol will stop blinking and remain solid. For better reception, place the clock away from metal

objects and electrical appliances (i.e. television, computer, monitor, etc.) to minimize interference.

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

iii

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.

Radio Control Clock

manual 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)

P.5 P.7

DATE, YEAR & ALARM SETTING

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

February will have either 28 or 29 days depending on the year setting

b c

Year Setting

Scroll to YEAR mode using MODE

Press + or - key to adjust year

DST Setting

User can manually select DST (daylight saving time) feature when DCF is failed to receive

Scroll to Year mode using MODE

iii

Press ALARM manually to enable and disable DST

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

P.6

DATE, YEAR & ALARM SETTING

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.

2 3

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:

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:

P.8

MOON PHASE

The moon phase is automatically updated according to the year/month/day.

Moon Phase Display

New Moon

Young Crescent

First Quarter

Waxing Gibbous

Full Moon

Waning Gibbous

Last Quarter

Old Crescent

P.9 P.10

TEMPERATURE & HUMIDITY DISPLAY

Check Local Temperature & Humidity

After insert batteries, local temperature & humidity will display in alternate pattern.

Check Remote Temperature & Humidity

Press CHN to toggle between Channel 1, 2, 3 and 4.

Temperature and humidity readings will alternate

on the receiver.

C or F Temperature Display

Toggle between C and F by pressing

C/F in either Clock1 or Clock2 mode.

Min and Max Temperature & Humidity

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

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

Local temperature alarm

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

1 5

Outdoor temperature alarm

Scroll to remote channel temperature alarm mode by using MODE

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 CHANNEL to select one desired channel of transmitter

Press MODE to finish

when temperature alarm sounds

It is to alert that the temperature has exceeded the preset temperature limit.

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.

P.11

WEATHER DISPLAY

1 5

1 6

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

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.

Cloudy

Raining

weather forecast symbols

Snowing

P.12

Freeze Warning

Storm Alert

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.

P.13 P.14 P.15

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

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

iii

remote sensor seems to high.

Receiver is no longer receiving

remote sensor signals or display

solution

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,

iii

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:

Temp. Range:

Measurement Accuracy: Max. +/- 1°C within measuring range of 0 to 40°C Resolution: 0.1°C Humidity Range: 25% to 90% RH

-5°C to +50°C

-9.9°C to +55°C

Weather Station Transmitter WT440H

Battery Type: 2 X 1.5V AA batteries

Operation Temp.: -20°C to +60°C

Temp. Range: -30

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)

P.16

°C to +70°C

+ 1 hidden pages

Mandolyn Electronic Technology WS738 Users Manual

Specifications and Main Features

Frequently Asked Questions

User Manual