Meade Weather Radio TE688W User Manual

TE688W  
Wireless Weather Forecaster with  
Indoor/ Outdoor Temperature and Humidity  
USER MANUAL  
 
INSTALLATION  
Communication between the main unit (receiver) and the  
remote sensor (transmitter) is wireless. This allows you to  
greater flexibility in choosing the location of remote sensor. The  
remote transmits data up to 100 feet (30 meters) over an open,  
unobstructed area.  
The remote sensor can be located either indoors or outdoors,  
allowing you chose where your data is obtained.  
NOTE:  
It is critical to power the remote sensor BEFORE setting up  
the main unit.  
It is critical to power up and test communication between the  
remote sensor and the main unit BEFORE permanently  
mounting if outside.  
BEFORE YOU BEGIN  
We recommend using alkaline batteries for the remote sensor  
and the main unit. If outdoor temperatures regularly fall below  
32°F (0°C), we recommend using lithium batteries.  
Avoid using rechargeable batteries. (Rechargeable batteries  
cannot maintain correct power requirements.)  
• ALWAYS install batteries in the remote sensor before the  
main unit.  
Insert batteries before first use, matching the polarity in the  
battery compartment.  
Press RESET after each battery change with a paper clip or  
similar tool.  
During initial set up, place the remote sensor close to the main  
unit.  
After reception is established (remote readings will appear on  
the main unit’s display), position the remote sensor and the  
main unit within the effective transmission range of up to 100  
feet (30 meters).  
The main unit must be placed indoors.  
NOTE:  
Avoid pressing any buttons on the main unit before the remote  
readings are displayed.  
Transmission or reception range may be affected by trees,  
metal structures, electronic appliances, surrounding building  
materials and how the main unit and transmitter are positioned.  
Place the remote sensor so that it faces the main unit (receiver),  
minimizing obstructions such as doors, walls and furniture.  
3
 
Though the remote sensors are weather-resistant, they should  
be placed away from direct sunlight, rain or snow. The optimal  
location for the remote sensor outdoors is under the eaves on  
the north side of the building.  
REMOTE TEMPERATURE AND HUMIDITY SENSOR  
(TS23C)  
FEATURES  
Remote data transmission to the main unit via 433 MHz  
frequency  
Three transmission channels  
Case can be wall mounted using built-in hanger  
A. LED INDICATOR  
Flashes once about every 45 seconds with each transmission to  
the main unit.  
Flashes twice when battery power is low.  
B. BATTERY COMPARTMENT  
Holds two AA-size batteries  
C. RESET  
Resets all previous settings  
D. CHANNEL SWITCH  
Selects the desired channel: 1, 2 or 3  
E. WALL-MOUNT RECESSED OPENING  
Mounts the remote sensor on the wall  
4
 
BATTERY INSTALLATION  
NOTE: When the temperature falls below freezing point  
32°F (0°C), battery voltage will drop which may result in  
reduced the transmission range. For optimum  
performance in cold weather conditions, we recommend  
using lithium batteries.  
NOTE: Install the batteries and select the channel before  
mounting the remote sensor.  
Remove the screws from the battery compartment with a small  
Phillips screwdriver (not included).  
Set the channel 1 through 3. The switch is located in the battery  
compartment. Channel 1 is typically selected if only one remote  
sensor is being used.  
Install 2 “AA” size alkaline batteries (not included) matching  
the polarities shown in the battery compartment.  
Replace the battery compartment door and secure the screws.  
Secure the remote sensor in the desired location.  
MOUNTING  
The remote sensor can be mounted either horizontally or  
vertically.  
Use a screw, rather than a nail, to securely mount the sensor.  
When mounting the main unit on a vertical surface, fold the  
built-in table stand back into the unit, allowing the main unit to  
lie flush with the surface.  
PLACEMENT  
The remote sensor should be placed under eaves or a similar  
location with free air circulation sheltered from direct sunlight  
and extreme weather.  
Ideally, place the remote sensor over soil, rather than asphalt  
which would cause false readings.  
Avoid placing the remote sensor near sources of heat, such as  
chimneys and heating elements  
Avoid areas that collect heat from the sun and radiate heat,  
such as metal, brick or concrete structures, paving, and patios  
The international standard for the valid air temperature  
measurements is 4 feet (1.25meters) above the ground  
OPERATION  
Immediately after batteries are installed, the remote sensor will  
start transmitting a temperature and humidity data to the main  
unit.  
5
 
MAIN UNIT  
The main unit measures indoor temperature and humidity  
readings and temperature and humidity from up to three remote  
sensors location (outside or inside). Its clock receives atomic  
time data from the US WWVB Atomic Clock.  
FEATURES  
TIME  
Precise time and date set via signals from the US Atomic clock  
12 or 24 hour time format  
Manual adjustment of time and date  
Calendar date with month and day in 7 languages English,  
German, French, Italian, Spanish, Dutch and Swedish  
Dual crescendo alarms with snooze  
Programmable ice warning alarm  
WEATHER  
Weather forecast for the next 12 to 24 hour in seven large  
icons: sunny, slightly cloudy, cloudy, rainy, heavy rainy,  
snowy and heavy snowy.  
Programmable minimum/maximum temperature alarm  
Indoor/outdoor temperature and humidity in up to 3 remote  
locations (additional sensors required)  
Barometric pressure in imperial or metric units  
Altitude adjustment for pressure compensation  
24 hour barometric pressure history chart  
Comfort level indicators (Dry, Humid, etc)  
6
 
A
B
C
H
I
D
E
F
G
J
K
L
7
 
A. WEATHER FORECAST/ PRESSURE window  
B. TEMPERATURE/ HUMIDITY window  
C. CLOCK window  
D. DOWN (? ) button  
Select the next available mode  
Press and hold for 2 seconds to search for wireless signal from  
remote sensor.  
Decrease parameters.  
E. ALARM button  
When time mode has been selected, press once to display the  
alarm time of weekday alarm (  
), single alarm (  
) and  
pre-alarm (  
).  
Hold for 2 seconds, set weekday, single or pre-alarm’s alarm  
time.  
When temperature mode has been selected, press once to  
display the highest or lowest temperature alarm’s value.  
Hold for 2 seconds, set the highest or lowest temperature  
alarm’s value.  
When alarm is on, press once to stop the alarm temporarily.  
F. CHANNEL button  
Press to display the outdoor temperature readings of Channels  
1, 2 or 3.  
Hold for 2 seconds, enter into the circulation mode and outdoor  
temperature readings of Channels 1, 2 or 3 will be displayed  
automatically in every 5 seconds.  
G. MODE button  
When pressure mode has been selected, press once to display  
the local pressure, altitude and sea level.  
Press and hold for 2 seconds to set altitude and sea level.  
When time mode has been selected, press once to toggle  
between time with seconds display or time with weekday  
display.  
Press and hold for 2 seconds, set language of the day of the  
week, year digit, month digit, date digit, hour format (12/ 24  
hours), hour digit and minute digit. (Note: calendar format is  
default in month-date display)  
When temperature mode has been selected, press and hold for  
2 seconds to toggle the temperature unit between Celsius or  
Fahrenheit.  
8
 
H. UP (? ) button  
Press to select the next available mode  
Increase the parameters  
In time with seconds display mode, press and hold for 2  
seconds to activate/ deactivate radio controlled time signal  
search manually.  
In time with weekday display mode, press and hold for 2  
seconds to switch time zone from Pacific, Mountain, Central to  
Eastern.  
I. MEM/ HISTORY button  
When temperature mode has been selected, press to recall the  
minimum or maximum temperature and humidity readings of  
main and remote units.  
Press and hold for 2 seconds, collected memories will be  
cleared.  
When pressure mode has been selected, press once to check the  
historical pressure data for the past 24 hours.  
J. WALL- MOUNT hole  
A recessed opening to mount the unit on a wall  
K. BATTERY COMPARTMENT  
Requires two (2) UM-3 or AA 1.5V alkaline batteries  
L. TABLE STAND  
BATTERY INSTALLATION  
Remove the battery door located at the back of the main unit.  
Insert two (2) AA size batteries according to the polarities  
shown and replace the battery compartment door.  
When placing the main unit on the table or other horizontal  
surface, unfold and adjust the table stand for the desired  
viewing angle.  
PLACEMENT  
Make sure that the main unit is locating within the operating  
range of all remote sensors.  
Ideally the main unit should be placed within line of sight of  
remote sensors. Avoid placing the main unit where surfaces  
emitting and radiating heat (e.g. heating ducts or air  
conditioners) and areas with interference from wireless devices  
(e.g. cordless phones, radio headsets, baby monitoring devices  
and other electronics).  
9
 
OPERATION  
Once the main unit is powered, the display will show all  
available LCD segments for a moment.  
IMPORTANT: All of the display functions will be locked,  
allowing setting of your local altitude and pressure parameters  
by pressing the UP (? ) or DOWN (? ) and MODE buttons.  
The locked display will show the pressure icon and abbreviation  
“inHg” flashing in the Weather Forecast/ Pressure Window,  
default time in Clock Window and channel 1’s temperature and  
humidity readings in Temperature/ Humidity Window.  
If pressure and altitude are not configured during this time, the  
unit will self-calibrate in a few minutes and show the default  
settings for the pressure and altitude (sea level) and all remote  
weather sensors readings.  
GETTING STARTED  
WEATHER FORECAST  
This unit is capable of detecting the atmospheric pressure  
changes. Based on collected weather data, it forecasts the  
weather for the next 12 to 24 hours.  
When the  
display  
shows...  
Heavy  
Rainy  
Heavy  
Snowy  
Partly  
Cloudy  
Forecast is... Sunny  
Cloudy  
Rainy  
Snowy  
NOTE: The weather forecast accuracy is approximately 70%.  
The main unit display shows forecasted (predicted) not  
current conditions. The SUNNY icon indicates clear weather,  
even when displayed during the nighttime.  
PRESSURE OPERATION  
The pressure window displays: current barometric pressure, sea  
level pressure, and weather forecast. The information contains a  
number of historical statistics: pressure/ temperature/ humidity  
history bar-chart for the past 24 hours  
Pressure can be measured in inHg, hPa/mBar or mmHg, and  
altitude is determined in either meters or feet.  
IMPORTANT: There are three viewing options available:  
barometric pressure SEA LEVEL or LOCAL and ALTITUDE.  
Local pressure is a measured value (can’t be adjusted) while  
Sea Level & Altitude are variables that you can enter. It is  
advisable to select and program only one of the variables and to  
allow the unit to calculate the third value.  
10  
 
The unit is designed to measure pressure changes at your  
specific location, when LOCAL barometric pressure is selected.  
Information for programming your unit, with either Altitude or  
Sea Level values, may be obtained from GPS readings, online  
from the Internet, etc.  
SEA LEVEL barometric pressure provides you with  
information about pressure changes at lower elevations in your  
surrounding area. The SEA LEVEL pressure value can be set  
to match your local metro area weather information. (Sources –  
local TV or radio station, etc.)  
SETTING INITIAL PRESSURE PARAMETERS  
IMPORTANT: Allow the unit to set without touching ANY  
buttons for about 6-8 minutes during the main unit initial set up.  
This will give the unit time to synchronize with remotes,  
stabilize pressure readings and settle with default settings.  
SELECT PRESSURE UNITS OF MEASURE  
Press UP (? ) or DOWN (? ),as needed, until the pressure icon  
“PRESSURE”, to the left of the barometric pressure value,  
begins to flash.  
• Press MODE button, to toggle through selections until  
“SEA LEVEL” or “LOCAL” barometric pressure is  
displayed.  
• Press and hold MEM/ HISTORY button to enter the pressure  
unit selection mode. Press the UP (? ) or DOWN (? ) button  
to select the preferred units of measure for pressure: inHG  
(English), hPa/mBar (scientific) or mmHg (metric)  
• Press MEM/ HISTORY to confirm your selection. Then press  
MODE to move to the ALTITUDE unit selection mode. Press  
the UP (? ) or DOWN (? ) button to select pressure unit as  
FEET or METER.  
• Press MEM/ HISTORY to confirm and hold MODE to move  
to the ALTITUDE value selection mode.  
• Press UP (? ) or DOWN (? ) to select or adjust the altitude  
value to your location. (Press and hold either button for  
accelerated digit advance)  
• Press MODE to confirm the programming selection.  
(NOTE: The unit will automatically exit programming mode  
if it does not detect a button press after 2 minutes.)  
11  
 
VIEWING PRESSURE AND ALTITUDE INFORMATION  
To view pressure or altitude information, press MODE button.  
The display will alternate between the sea level pressure, local  
pressure and local altitude screens.  
PROGRAMMING SEA LEVEL PRESSURE (not required if  
you did altitude)  
Press and hold MODE, until the barometric pressure digits are  
flashing.  
Enter the desired sea level pressure value by pressing UP (? )  
or DOWN (? ) buttons. (Press and hold either button for  
accelerated digit advance.)  
Press MODE, to confirm sea level value selection.  
CHANGING PRESSURE AND ALTITUDE UNITS  
Press MODE as needed, until “LOCAL” pressure is displayed.  
Press and hold MEM/ HISTORY, until the pressure unit is  
flashing.  
Change local or sea level pressure units by pressing the  
UP (? ) or DOWN (? ) buttons to select the pressure units.  
Choose from: inHg, hPa/mBar or mmHg.  
Press MEM/ HISTORY to confirm your selection.  
Press MODE button until the local altitude value will be  
displayed  
Press and hold MEM/ HISTORY until the altitude unit is  
flashing.  
Select the ALTITUDE unit:, meters or feet, by pressing  
UP (? ) or DOWN (? ) buttons.  
Press MEM/ HISTORY to confirm your selection.  
VIEWING SEA LEVEL PRESSURE HISTORY  
In pressure mode, press MEM/ HISTORY button entering the  
sea level pressure display.  
When the SEA LEVEL is displayed, press MEM/ HISTORY  
repeatedly viewing the sea level pressure history for the past 24  
hours in 1 hour intervals.  
If no buttons are pressed for 5 seconds, the unit will  
automatically return to the default Pressure and Weather  
Forecast Mode.  
VIEWING PRESSURE, TEMPERATURE AND HUMIDITY  
CHARTS  
The bar chart in Pressure Window can be configured to display  
a historical data for the sea level pressure and temperature or  
humidity for channel 1.  
12  
 
After selecting the Pressure Window, press and hold ALARM  
button to toggle the bar chart between the sea level pressure with  
a word “PRESSURE” displayed at the right bottom corner of  
the chart, temperature with a thermometer icon and “CH1” and  
a humidity with “RH” icon and “CH1”.  
MOON PHASE ICONS  
New Waning  
First  
Waxing Full Waning Last  
Waning  
Moon Crescent Quarter Gibbous Moon Gibbous Quarter Crescent  
TEMPERATURE/ HUMIDITY WINDOW  
The main unit supports up to 3 remote sensors, corresponding to  
a separate channel of the temperature and relative humidity  
display. The temperature can be displayed in Celsius (ºC) or  
Fahrenheit (ºF).  
The main unit carries the temperature and humidity sensor and  
uses this data to calculate an indoors comfort level - Wet,  
Comfort or Dry.  
A temperature alert function is available for all channels. It can  
be programmed to sound if the channel temperature exceeds or  
falls below the pre-set upper and lower limits.  
REMOTE SENSORS STATUS  
The wave icon above the current channel icon shows the  
connection status of the corresponding remote sensor:  
Icon  
Status  
Searching for the signals from the  
remote sensor  
Corresponding remote sensor signal  
received successfully  
No signals received for over 1 hour  
SEARCH FOR REMOTE SENSORS  
The main unit can be manually activated to search for the  
signals from remote sensors by pressing and holding DOWN  
(? ) button.  
13  
 
OPERATION  
To select the indoor/ outdoor temperature and humidity mode,  
press UP (? ) or DOWN (? ) until the IN icon  
with a beep sound alert.  
flashing  
VIEWING REMOTE (CHANNEL) TEMPERATURE AND  
HUMIDITY  
Static Display:  
Press the CHANNEL button to select measurements from  
different remote sensors, each is set to a unique channel 1,  
2 or 3.  
Channel Auto-Scan Display:  
To enable an automatic scan of all channels, press and hold  
CHANNEL, until the  
icon is displayed. The measurements  
from each remote channel will be alternately displayed with a  
5 seconds viewing.  
NOTE: the channel auto-scan feature can be active only if there  
are more than one remote sensors operating and are set to  
different channels.  
PROGRAMMING TEMPERATURE IN CELSIUS OR  
FAHRENHEIT  
Press and hold MODE button for 3 seconds to toggle the  
temperature unit in Celsius (ºC) or Fahrenheit (ºF).  
SETTING TEMPERATURE ALARM  
Press down button to select temperature display.  
Press ALARM button selecting the desired alarm, the upper  
temperature alert with  
icon (if disabled, displays OFF), or  
lower temperature alert with icon (if disabled, displays  
OFF).  
Press and hold ALARM button until the temperature digits  
flashing.  
Adjust the temperature digits using the UP (? ) or DOWN  
(? ). Press and hold either button for fast digits advance  
Press the ALARM to confirm selection and return to the  
temperature alarm selection screen  
ACTIVATING OR DEACTIVATING TEMPERATURE  
ALARMS  
Once the above alerts are displayed, press the UP (? ) or  
DOWN (? ) to enable or disable the corresponding alert.  
14  
 
VIEWING MAX/MIN AND MINIMUM READINNGS  
Press the MEM/ HISTORY button recalling:  
Current temperature and humidity  
Minimum temperature and humidity  
Maximum temperature and humidity at the remote location.  
RESETTING TEMPERATURE MEMORIES  
Press and hold MEM/ HISTORY button for 3 seconds to clear  
all channel memories.  
COMFORT LEVEL INDICATION  
The main unit is capable of detecting and displaying the current  
indoor comfort levels of surrounding environment. The comfort  
level based on the combination of the current indoor temperature  
and humidity readings. The following comfort levels may be  
displayed: COMFORT (comfortable); WET (wet) and DRY  
(dry)  
Indicator  
displayed  
Temperature  
Range  
Humidity  
Range  
Shows current  
condition  
20°C to 25°C  
(68°F to 77°F)  
40%RH-  
70%RH  
Ideal relative humidity  
and temperature  
COM  
-5°C to 50°C  
(23°F to122°F)  
OVER  
70%RH  
Contains excess  
moisture  
WET  
DRY  
5°C to 50°C  
(23°F to122°F)  
BELOW  
40%RH  
Contains inadequate  
moisture  
CLOCK WINDOW  
WWVB RADIO CONTROLLED TIME  
The NIST (National Institute of Standards and Technology)  
radio station (WWVB) is located in Ft. Collins, Colorado. It  
transmits an exact time signal continuously throughout the most  
of the continental United States at 60 KHz frequency. The main  
unit can receive this WWVB signal through the internal antenna  
from up to 2,000 miles away. Due to the nature of the Earth’s  
ionosphere, reception can be limited during the daylight hours.  
The radio controlled clock will search for an alternate station that  
receives the atomic time signal from the NIST Atomic clock in  
Boulder, Colorado.  
15  
 
The WWVB tower icon on the unit’s display will flash  
indicating a radio signal reception from the WWVB station. If  
the tower icon is not fully lit, or if the time and date are not  
set automatically, please consider the following:  
During nighttime hours, atmospheric disturbances are  
typically less severe and radio signal reception may improve. A  
single daily reception is sufficient enough to keep the clock  
accuracy within 1 second.  
Make sure the unit is positioned at 8 feet (2 meters) distance  
from any interference source such as a TV, computer monitor,  
microwave, etc.  
Within concrete wall rooms such as basements or office  
buildings, the received signal may be weakened. Always place  
the main unit near the window for better reception.  
Once the atomic time signal is received, the date and time will  
be set automatically, and the [  
] icon will appear.  
Icon  
Atomic Time Reception Strength  
Undefined data  
No Reception for the past 24 hours  
Weak signal, but can be decoded  
Strong signal  
The atomic clock receiver is programmed that it will search for  
the atomic time signal daily for 0:00, 3:00, 6:00, and 12:00 am.  
To enable or disable the atomic time receiver, press and hold  
UP (? ) button for 3 seconds. If atomic time reception is  
activated, a tower icon will start flashing. If reception is  
disabled, the tower icon will disappear.  
If the time signal has not been received in 8 minutes, you may  
set the time manually.  
MANUAL SETTINGS  
To select the time mode, press UP (? ) or DOWN (? ) until the  
IN icon flashing with a beep sound alert. It is necessary to  
set the desired US TIME ZONE.  
16  
 
TIME ZONE  
Press MODE button once to select hour and minutes with the  
day of the week display.  
Select the Time Zone by pressing and holding UP ( ? ) button  
for 3 seconds  
Keep holding UP ( ? ) button until the desired US Time Zone  
(Pacific, Mountain, Central or Eastern) is highlighted on the  
display’s US map, located to the right of the time display and  
above the day of the week  
Release the UP ( ? ) button. The Time Zone is set.  
TIME AND CALENDER  
Press and hold MODE button until the day of week language  
abbreviation “ ” will flash  
Press the UP (? ) or DOWN (? ) selecting the day of the week  
in English, German, French, Italian, Spanish, Dutch or Swedish.  
After the language of weekday is set, press MODE button  
to confirm and move to the next parameter (year)  
Continue setting the year, month, day, time format (12 or 24  
hours), local hour and minutes, using the same technique  
After programming is complete the display will return to the  
default hour and minutes with seconds display.  
CLOCK ALARMS  
There are two time alarms – Weekday alarm (  
) and Single  
day alarm(  
) - and one Ice Warning Alarm (  
).  
If Weekday (  
) alarm is activated, it will sound at the set  
time and the alarm icon will flash Mondays through Fridays  
If Single (  
) day alarm is activated, it will sound at the set  
time and the alarm icon will flash only for this specific day and  
will not activate on subsequent days  
If Ice Warning Alarm (  
) is activated, it will sound  
at the set time and alarm icon will flash once the remote  
temperature for Channel One (1) will reach 32°F(0°C) and  
below  
NOTE: Ice Warning Alarm can be set only if Weekday  
and/or the single alarm are programmed.  
SETTING THE WEEKDAY (  
ALARMS  
) AND SINGLE DAY (  
)
Press ALARM button once to enter into the alarms setting  
mode. The default alarm is a Weekday alarm (  
abbreviation “ ” with a letter “ ” next to it will be  
displayed, if the alarm has not been set previously  
Press and hold ALARM button for two seconds. The hour digit  
will flash  
). The  
17  
 
Adjust the hour using UP ( ? ) or DOWN ( ? ) buttons  
Press ALARM button again. The minute digits will flash  
Adjust the minutes using UP (? ) or DOWN (? ) buttons  
Press ALARM button again to confirm and the weekday alarm  
time will be set  
Set Single (  
) day alarm if desired in the same manner  
SETTING THE ICE WARNING ALARM (  
)
If Weekday ( ) or Single day ( ) alarm is MODE, the  
Ice Warning Alarm (Pre-AL) can be programmed.  
Press ALARM button once to enter into the Ice Warning  
Alarm setting mode. The abbreviation OFF with a PRE-AL  
next to it will be displayed.  
Press and hold ALARM button for two seconds. The number  
30 will flash, meaning that if selected, the alarm will sound 30  
minutes earlier than the Weekday or Single alarm.  
Select the desired Ice Warning Alarm interval in 15 minutes  
increments between 15 and 90 minutes, using UP (? ) or  
DOWN (? )buttons  
Press ALARM button to confirm and exit from the alarm  
setting mode.  
ACTIVATING/ DEACTIVATING ALARMS  
Press ALARM button to enter into the desired alarm mode.  
Press UP ( ? ) to activate alarm and the corresponding icons  
,
or  
will be displayed.  
Press DOWN ( ? ) to deactivate alarm until “  
” is  
displayed.  
MAINTANANCE  
CHANGING BATTERIES  
If the low battery indicator lights up, replace batteries in the  
corresponding unit.  
Do not mix old and batteries.  
CLEANING  
The main unit and remote sensors housings can be cleaned with  
a damp cloth. Small parts can be cleaned with a cotton tip or  
pipe-cleaner. Never use abrasive or corrosive cleaning agents or  
solvents. Do not immerse electronic components in water.  
18  
 
TROUBLESHOOTING  
Check here before contacting customer service.  
Issue  
Symptom  
Solution  
US Atomic  
Time signal is  
not received  
Place unit by the window and  
keep it there overnight  
Main unit  
Check batteries  
Check location  
Cannot locate  
remote sensor  
Remote  
sensor  
Press and hold DOWN ( ? ) button  
on the main unit to search for the  
signal form the remote sensor  
Cannot change  
the channel  
Press “RESET” after setting the  
channel  
Data does not  
match data on  
the main unit  
Initiate manual sensor search (Press  
and hold DOWN ( ? ) button on the  
main unit)  
PRECAUTIONS  
This product is engineered to give you years of satisfactory  
service if handled carefully. Here are a few precautions:  
Do not immerse the units in water.  
Do not clean the units with abrasive or corrosive materials.  
They may scratch the plastic parts and corrode the electronic  
circuits.  
Do not subject the product to excessive force, shock, dust,  
temperature, or humidity, which may result in malfunctions,  
shorter lifespan, damaged batteries, and damaged parts.  
Do not tamper with the units internal components. Doing so  
will invalidate the warranty and may cause damage. These units  
contain no user-serviceable parts.  
Use only fresh batteries. Do not mix new and old batteries.  
Read the user’s manual thoroughly before operating the units.  
19  
 
SPECIFICATIONS  
Main Unit  
Indoor Temperature  
Operating range: 23.0°F to 122.0°F (-5°C to +50°C)  
Temperature resolution: 0.2°F (0.1°C)  
User-selectable (°F or °C) temperature display  
Humidity (Indoor)  
Operating Range: 30% to 80%  
Resolution: 1%  
Accuracy: 7%  
Sampling Interval: 10 seconds  
Weather Forecast: in seven large icons: sunny, slightly cloudy,  
cloudy, rainy, heavy rainy, snowy and heavy snowy.  
Maximum number of remote sensors: 3 (one included)  
Readings update interval: every 45 seconds  
Low battery indicator  
Clock  
Precise atomic time  
4 US Time Zones  
12/24 hour time format  
Crescendo 2 minutes alarm with 8 minutes snooze  
Barometric Pressure  
Measuring Range: 14.75 inHg to 32.44 inHg (500 Hpa to  
1100Hpa); (374.5 mmHg to 823.8 mmHg)  
Resolution: 0.003 inHg (0.1 Hpa, 0.08 mmHg)  
Accuracy: 0.015 inHg (5 Hpa; 0.38 mmHg)  
Sampling interval: 20 minutes  
Altitude Compensation Range: -657 ft to 16404 ft (-200m to  
+5000 m)  
Remote Sensor  
Remote Temperature  
Operating range with alkaline batteries:  
-4°F to + 158°F (-20°C to + 70°C)  
Operating range with lithium batteries:  
-38.8°F to +158°F (-38.8°C to + 70°C)  
Temperature resolution: 0.1°C/0.2°F  
Humidity (Outdoor)  
Operating Range: 30% to 80%  
Resolution: 1%  
Accuracy: 7%  
Sampling Interval: 10 seconds  
Transmitting Interval: around 47 seconds  
RF Transmission Frequency: 433 MHz  
20  
 
RF range: Maximum 100 feet (30 meters)  
Temperature transmission cycle: approximately 45 seconds  
Low battery indicator  
Wall-mount or Table stand  
Power  
Main unit: 2 AA size (UM-3) 1.5V batteries (not included)  
Remote Sensor: 2 AA size 1.5V batteries (not included)  
Dimensions  
Main unit: 3.47(L) x 7.28(H) x 1.10(D) inches/  
88(L) x 185(H) x 28(D) mm  
Remote sensor: 2.37(L) x 4(H) x 1(D) inches /  
60(L) x 101(H) x 25(D) mm  
FCC STATEMENT  
This device complies with Part 15 of the FCC Rules. Operation  
is subject to the following two conditions: (1) This device may  
not cause harmful interference, and (2) This device must accept  
any interference received, including interference that may cause  
undesired operation.  
Warning: Changes or modification to this unit not expressly  
approved by the party responsible for compliance could void the  
user’s authority to operate the equipment.  
NOTE: This equipment had 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, installed and used in  
accordance with the instructions, may cause harmful interference  
to radio communications.  
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 improve or correct turning 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 to 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.  
21  
 
DECLARATION OF CONFORMITY  
We  
Name: Meade Instruments Corp.  
Address: 27 Hubble, Irvine, CA 92618 - 4209  
declare that the product  
Product No.: TE688W  
Product Name: Wireless Weather Forecaster with Indoor/  
Outdoor Temperature and Humidity  
Manufacturer: Hideki Electronics Limited  
Address: Unit 2304-06, 23/F Riley House, 88 Lei Muk Road,  
Kwai Chung, New Territories, Hong Kong  
is in conformity with Part 15 of the FCC Rules. Operation is  
subject to the following two conditions:  
This device may not cause harmful interference.  
This device must accept any interference received, including  
interference that may cause undesired operation.  
Battery Safety Instructions  
Always purchase the correct size (4 x 1.5V AA, 15A/15AC  
ANSI, LR6 IEC), (2 x ANSI/NEDA-5004LC, IEC-CR2032)  
and grade of battery most suitable for the intended use.  
Replace all batteries of a set at the same time.  
Clean the battery contacts and also those of the device prior to  
battery installation.  
Ensure the batteries are installed correctly with regard to  
polarity (+ and -).  
Remove the batteries from any weather station which is not to  
be used for an extended period of time.  
Remove used batteries promptly.  
Do not mix old batteries with new batteries.  
Do not mix alkaline, lithium, standard (Carbon Zinc), or  
rechargeable (Nickel Cadmium) batteries.  
Caution:  
If batteries or parts are swallowed, see a doctor immediately.  
22  
 
STANDARD WARRANTY INFORMATION  
This product is warranted by Meade Instruments Corp. (MIC) to  
be free of defects in materials and workmanship for a period of  
ONE YEAR from date of original retail purchase in the  
U.S.A. MIC will repair or replace the product, or part thereof,  
found upon inspection by MIC to be defective, provided the  
defective part or product is returned to MIC, freight prepaid,  
with proof of purchase. This warranty applies to the original  
purchaser only and is non-transferable. Meade products  
purchased outside North America are not included in this  
warranty.  
RGA Number Required: Prior to the return of any product or  
part, a Return Goods Authorization (RGA) number must be  
obtained by writing to Meade's Customer Service Department or  
by calling 800-626-3233. Each returned part or product must  
include a written statement detailing the nature of the claimed  
defect, as well as the owner's name, address, phone number, and  
a copy of the original sales invoice.  
This warranty is not valid in cases where the product has been  
abused or mishandled, where unauthorized repairs have been  
attempted or performed, or where depreciation of the product is  
due to normal wear-and-tear. MIC specifically disclaims special,  
indirect, or consequential damages or lost profits, which may  
result from a breach of this warranty. Any implied warranties  
which cannot be disclaimed are hereby limited to a term of one  
year from the date of purchase by the original retail purchaser.  
This warranty gives you specific rights. You may have other  
rights which vary from state to state.  
MIC reserves the right to change product specifications or to  
discontinue products without prior notice.  
This warranty supersedes all previous Meade product warranties.  
Copyright (2010) Meade Instruments Corporation. All Rights  
Reserved.  
All user manual contents and information are subject to change.  
23  
 
Meade Instruments Corp.  
27 Hubble  
Irvine, CA 92618 U.S.A.  
© 2011 Meade Instruments Corp. All Rights Reserved.  
All user manual contents and information are subject to change.  
 

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