TE256W
Slim Indoor/ Outdoor Thermo-Hygrometer
with Atomic Clock
USER MANUAL
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INSTALLATION
Communications 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 164 feet (50 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 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 insert batteries into the remote sensor before the main unit.
• Insert batteries before first use, matching the polarity in the battery compartment.
• During initial set up, place the remote sensor close to the main unit.
• After reception is established (remote readings will be appeared on the main unit’s display),
position the remote sensor and the main unit within the effective transmission range of up to
164 feet (50 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, and 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.
• 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.
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REMOTE TEMPERATURE AND HUMIDITY SENSOR (TS21)
FEATURES
• Remote data transmission to the main unit via 433 MHz frequency
• Single transmission channel
• Case can be wall mounted using accessory hanger
A. BATTERY COMPARTMENT
• Holds two AAA-size batteries
A
B
B. WALL-MOUNT RECESSED HOLE
• Mounts the remote sensor on the wall
BATTERY INSTALLATION
NOTE: When the temperature falls below freezing point 32F° (0C°), 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 before mounting the remote sensor.
• Remove the screws from the battery compartment with a small Phillips screwdriver (not
included).
• Install 2 “AAA” size 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.
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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.
MAIN UNIT
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 displays in date with month format
• Weekday abbreviation in 7 languages English, German, French, Italian, Spanish,
Dutch and Swedish
• Dual crescendo alarms with snooze
• Programmable ice warning alarm
TEMPERATURE AND HUMIDITY
• User-defined high/ low temperature alarm
• Indoor/ outdoor temperature and humidity in up to 3 remote locations (additional sensors
required)
• Comfort level indicators (wet, comfort, dry)
• Minimum and maximum memories of temperature and humidity
• Auto scanning mode – 3 channels of outdoor readings will be displayed one by
one automatically
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FRONT
B
C
F
E
D
A
G I
H
REAR
J
K
L
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A. INDOOR TEMPERATURE/ HUMIDITY window
B. OUTDOOR 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. 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 atomic
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.
F. MODE button
• 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 and humidity mode has been selected, press and hold for 2 seconds to
toggle the temperature unit between Celsius or Fahrenheit.
G. ALARMbutton
• When time mode has been selected, press once to display the alarm time of weekday
alarm (W), single alarm (S) and pre-alarm (Pre-AL).
• Hold for 2 seconds, set weekday, single or pre-alarm’s alarm time.
• When temperature and humidity 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.
H. MEMbutton
• When temperature and humidity 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.
I. CHANNEL button
• Press to display the outdoor temperature readings of Channels 1, 2 and 3. (additional remote
sensors are required)
• Hold for 2 seconds, enter into the circulation mode and outdoor temperature readings of
Channels 1, 2 and 3 will be displayed automatically in every 5 seconds.
J. WALL- MOUNT holes
• Use 2 provided screws to mount the unit on a wall
K. BATTERY COMPARTMENT
• Accommodate two (2) CR2032 batteries
L. TABLE STAND
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BATTERY INSTALLATION
• Remove the battery door located at the back of the main unit.
• Insert two (2) CR2032 lithium cell batteries and replace the battery compartment door.
PLACEMENT
• When mounting the main unit on the wall or vertical surface, fold the table stand back into
the unit.
• 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).
OPERATION
Once the main unit is powered, the display will show all available LCD segments for a moment.
GETTING STARTED
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 next to the current channel icon shows the connection status of the
corresponding remote sensor:
Status
Icon
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.
OPERATION
• To select the temperature & humidity mode, press UP (? ) or DOWN (? ) until the
icon flashes with a beep sound alert.
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VIEWING REMOTE (CHANNEL) TEMPERATURE AND HUMIDITY
Static Display:
• Press the CHANNEL button to select measurements from different remote sensors, each is
MODE 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
displayed. The measurements from each remote channel will be alternately displayed with a
5 seconds viewing.
icon is
NOTE: the channel auto-scan feature can be activated 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.
VIEWING MAXIMUM AND MINIMUM READINNGS
Press the MEM button recalling:
• Current temperature and humidity
• Minimum temperature and humidity
• Maximum temperature and humidity
RESETTING TEMPERATURE MEMORIES
Press and hold MEM 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)
Shows current
condition
Indicator Temperature Humidity
displayed
Range
Range
Ideal relative humidity
and temperature
20°C to 25°C
40%RH-
COM
(68°F to 77°F) 70%RH
Contains excess
moisture
-5°C to 50°C
OVER
WET
(23°F to122°F) 70%RH
Contains inadequate
moisture
5°C to 50°C BELOW
(23°F to122°F) 40%RH
DRY
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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.
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
Time Signal Reception Strength
(Flashing) 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 time signal daily at 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 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 TIME icon flashes with a
beep sound alert. It is necessary to set the desired US TIME ZONE.
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.
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TIME AND CALENDER
• Press and hold MODE button until the day of week language abbreviation “ENG” 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 (W) and Single day alarm(S) - and one Ice
Warning Alarm (PRE-AL).
• If Weekday (W) alarm is activated, it will sound at the set time and the alarm icon will flash
Mondays through Fridays
• If Single (S) 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 ( PRE-AL) is activated, in 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 one or both - Weekday or Single alarm - are
programmed.
SETTING THE WEEKDAY (W) AND SINGLE DAY (S) ALARMS
• Press ALARM button once to enter into the alarms setting mode. The default alarm is a
Weekday alarm (W). The abbreviation “OFF” with a letter “W” 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
• 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 (S) day alarm if desired in the same manner
SETTING THE ICE WARNING ALARM (PRE-AL)
If Weekday (W) or Single day (S) alarm is set, 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 W, S or PRE-AL will be
displayed.
• Press DOWN ( ? ) to deactivate alarm until “OFF” is displayed.
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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.
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
Data does not
Initiate manual sensor search (Press and hold
match data on the DOWN ( ? ) button on the main unit)
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.
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SPECIFICATIONS
Main Unit
Indoor Temperature
Proposed 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
Clock
Precise atomic time
4 US Time Zones
12/24 hour time format
Crescendo 2 minutes alarm with 8 minutes snooze
Remote Sensor
Remote Temperature
Proposed operating range with alkaline batteries:
-40°C to + 50°C (-40°F to + 122°F)
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
RF range: Maximum 164 feet (50 meters)
Temperature transmission cycle: approximately 45 seconds
Low battery indicator (shown on the main unit’s display)
Wall-mount or table stand
Power
Main unit: 2 CR2032 size 1.5V batteries (included)
Remote Sensor: 2 AAA size 1.5V batteries (not included)
Dimensions
Main unit: 7.01(L) x 4.72(H) x 0.37(D) inches/ 178(L) x 120(H) x 9.5(D) mm
Remote sensor: 1.48(L) x 4.33(H) x 0.91(D) inches / 37.5(L) x 110(H) x 23(D) mm
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Battery Safety Instructions
• Always purchase the correct size (2 x 1.5V AAA, 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.
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 (2011) Meade Instruments Corp. All Rights Reserved.
All user manual contents and information are subject to change.
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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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