SkyScan 87800 User manual

1
®
ATOMIC CLOCK
WITH OUTDOOR WIRELESS TEMPERATURE
AND MOON PHASE
MODEL 87800-87801
Instruction Manual
FEATURES:
WWVB Radio controlled time with manual time setting
12/24 hour time display
Time display: hour, minute, second
Alarm setting with snooze function
Calendar display
Weekday display (4 languages to choose from: English, French, Spanish and German)
Time zone setting
Daylight savings time ON/OFF option (DST)
ºC or ºF temperature display selectable
Indoor temperature display
Outdoor temperature display via 433MHz transmission
Wall mount or freestanding
Current moon phase display

2
Holder
OUTDOOR TEMPERATURE TRANSMITTER:
Remote transmission of outdoor temperature to the atomic clock by 433 MHz
signals
Wall mounting case
TO INSTALL AND REPLACE BATTERIES IN THE ATOMIC CLOCK
The atomic clock uses 2 x AA, 1.5V batteries. To install and replace the batteries, please follow the steps below:
1. Remove the cover.
2. Insert batteries observing the correct polarity (see marking inside battery compartment).
3. Replace compartment cover.
DO NOT SET THE CLOCK.
TO INSTALL AND REPLACE BATTERIES IN THE TEMPERATURE TRANSMITTER
The transmitter uses 2 x AA,1.5V batteries. To install and replace the batteries, please follow the steps below:
1. Remove the cover.
2. Insert the batteries, observing the correct polarity (see marking inside battery compartment).
3. Replace the battery cover on the unit.
Alkaline batteries are recommended for use in both units. Avoid using rechargeable batteries.
SETTING UP:
NOTE: Do not set the clock until the outdoor temperature is displayed.
1. Place batteries in the outdoor transmitter first, then into the atomic clock. DO NOT PRESS ANY
BUTTONS FOR 10 MINUTES.
2. After 10 minutes both the Indoor and Outdoor areas on your clock should have a temperature showing. If
not, remove both sets of batteries, wait 10 minutes and repeat step one.
3. After the clock receives the outdoor temperature, and 10 minutes has elapsed, set your time zone. The
default time zone is Eastern Standard Time (EST). If you live in the Eastern Time zone move to step
5.
4. To set the time zone:
Push and release the “SET” function button.
The time zone (LCD2) will start flashing (Default setting -5EST).
Push the (+) function button to change the default setting (-5EST) to the desired time zone.
-6 CST (Central Time Zone)
-7 MST (Mountain Time Zone)
-8 PST (Pacific Time Zone)
(See “Time Zone Setting” if you live outside the USA)

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Weekday
5. After the clock receives the outdoor temperature the WWVB time code reception will automatically start.
The clock will automatically set itself to the exact time, day and date after receipt of the WWVB time code
reception. This typically takes over night. For best reception place your clock next to a window facing
Colorado over night. Once a successful reception is received the Radio Reception ( ) icon will appear
above the blinking colons. Once a successful reception is received relocate your clock to a desired location.
The clock will then automatically attempt to receive the WWVB time from 12:00 am through 6:00 am each
day (attempts WWVB reception every full hour within this time frame). When this is successful, the
received time will override the manually set time. The date is also updated with the received time (Please
refer to notes on “Radio controlled time” and “Manual time setting”).
Note:
In the event of changing batteries of the unit ensure that the batteries do not spring free from the contacts.
Always wait at least 10 minutes after removing the batteries before reinserting, otherwise start up and
transmission problems may occur.
FUNCTION KEYS
The atomic clock has four easy to use keys:
SET key To enter into the set mode for the following functions: time zone, DST ON/OFF (daylight saving
time), language, hour, minute, year, month, day, weekday, 12/24 hour, ºC or ºF temperature display
+key To toggle between the seconds, temperature or weekday display
To change any values in manual set mode
ALM key To enter into the alarm set mode
To set the alarm ON/OFF
SNZ key To activate the snooze function during alarm
To display the alarm time in normal mode display
To exit the setting modes
ATOMIC CLOCK LCD SCREEN DESCRIPTIONS
The atomic clock's LCD is divided into 2 sections. When batteries are inserted, all the segments will light up
briefly before displaying the information for time, date, indoor and outdoor temperatures.
Date
Outdoor temperature display
WWVB time
Time reception icon
Alarm icon
Indoor temperature

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MOON PHASE SYMBOLS:
The atomic clock automatically calculates and updates the moon phase diagram on LCD2. The phase display
will change approximately every 2 days, 11 hours. Whenever the date or time is changed manually, the atomic
clock will display the updated moon phase within a few minutes. Twelve stages of the moon’s phases are
represented.
New Moon Small Waxing Large Waxing First Quarter Small Waxing Large Waxing
Crescent Crescent Gibbous Gibbous
FullMoon Large Waning Small Waning Last Quarter Large Waning Small Waning
Gibbous Gibbous Crescent Crescent
Note: The moon phase visible in the sky is noted by a darkening of the LCD screen. Therfore, a full moon is a
complete dark circle.
MANUAL SETTINGS
Note:
If the atomic clock has already successfully received the WWVB time signal and displays the correct time
and date, then the Manual settings can be skipped.
After completion of the above described procedures in “Setting up” the manual setting modes can be entered by
pressing and holding the SET key for 3 seconds. The following settings can now be programmed:
Time zone setting
DST ON/OFF
Language display setting
Manual time setting
Year setting
Month setting
Date setting
Weekday setting
12/24 hour time display setting
ºC or ºF setting

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TIME ZONE SETTING
After entering the manual setting mode as described above, the time zone can be set using the number of hours
different from Greenwich Mean Time (GMT) range in LCD2. To do this:
1. The time zone (LCD2) will start flashing (Default setting "-5h“). Select the desired time zone by pressing
and releasing the +key.
Note: The time zones from –4 to –10 hours will be displayed with 3 characters abbreviations:
-4 ATL (Atlantic time),
-5 EST (Eastern time; default time zone),
-6 CST (Central time),
-7 MST (Mountain time),
-8 PST (Pacific time),
-9 ALA (Alaska time),
-10 HAW (Hawaii time).
"GMT” will be displayed if set to GMT (0).
2. Press and release the SET key to enter the “DST Setting“.
DST SETTING (daylight saving time)
1. The ON digit will start flashing on LCD1. Set the DST ON or OFF by pressing the +key.
2. Press and release the SET key to enter the “Language Setting“.
Note:
The DST default is “ON”, meaning that the WWVB will automatically change the time according to Daylight
Saving Time in the spring and fall. For areas that do not recognize DST changes (Arizona and parts of Indiana)
turn the DST “OFF”.
LANGUAGE SETTING
The weekdays can be displayed in LCD2 with the pre-set languages: English, French, Spanish and German.
US = English
F = French
E = Spanish (Espanol)
D = German (Deutsch)
1. Set the desired language for the weekday display in LCD 2 by use of the + key.
2. Press and release the SET key to enter the mode “Manual Time Setting”.

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MANUAL TIME SETTING
In case the atomic clock is not able to detect the WWVB-signal (disturbances, transmitting distance, etc.), the
time can be manually set. The clock will then work as a normal Quartz clock.
Note: In 12 hours mode the time will be displayed with an additional “PM”for the time from 12:00 noon until
11:59 pm.
1. The hour digits will start flashing on LCD1.
2. Set the desired hours by pressing and releasing the +key followed by pressing the SET key.
3. Now the minute digits will start flashing.
4. Set the desired minutes by pressing and releasing the +key. If the +key is held, the units will increase by 5.
5. Press and release the SET key to move to the “Year Setting”.
Note:
The unit will still try and receive the signal every day despite it being manually set. When it does receive the
signal, it will change the manually set time into the received time. During reception attempts the WWVB tower
icon will flash. If reception has been unsuccessful, then the WWVB tower icon will not appear but reception
will still be attempted the following hour.
WWVB time reception takes place from 12:00 am through 6:00 am each day (attempts WWVB reception every
full hour within this time frame). When the time signal is received for example at 1:00 am, the atomic clock
will not attempt to receive the WWVB signal for the remaining hours until 6:00 am. Therefore, the next signal
attempt will take place between 12:00 am and 6:00 am the next day. The other times WWVB reception takes
place, are upon setup and after manual time set exiting mode. Reception is generally not possible during
daylight hours due to the interference of the sun.
YEAR SETTING
The year can be selected sequentially from 2000 to 2049 and will then start over again (default setting 2000).
Only the last 2 digits of the year will be visible on LCD2.
1. The year digits will start flashing on LCD2. Select the desired year by use of the +key.
2. Press and release the SET key to switch to the “Month Setting”.
MONTH SETTING
1. The month digits on LCD2 will start flashing. Set the desired month by use of the +key.
2. Press and release the SET key to move to the mode “Date Setting”.
DATE SETTING
1. The digits for the date will start flashing on LCD2 (Default setting 1). Set the desired date by use of the +
key.
Note: The date can only be set in conjunction with the selected month. For example, it is not possible to set
the date 30 if the month of February is selected.
2. Press and release the SET key to enter the “Weekday Setting”.
WEEKDAY SETTING
1. The weekday symbols will be displayed on LCD2 in the pre-set language and flashing. Set the desired
weekday by use of the + key.
2. Press and release the SET key to enter the mode “12/24 Hours Time Display Setting”.

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12/24 HOURS TIME DISPLAY SETTING
1. The “12” or “24” will start flashing in LCD1 (Default setting 12h). Select the desired time display mode by
use of the + key.
2. Press and release the SET key to enter the “ºC/ºF Temperature Setting“.
°C OR °F TEMPERATURE SETTING
1. The characters “°C” or “°F” will start flashing on LCD1 (Default setting °F). By use of the +key select
“°C” for temperature display in degrees Celsius or “°F” for degrees Fahrenheit.
2. Press and release the SET key to exit the setting mode and switch back to the normal display mode.
EXIT THE MANUAL SETTING MODES
To return to the normal display mode from anywhere in manual setting mode simply press the SNZ key
anytime.
If no keys are pressed for at least 15 seconds in setting mode, the atomic clock will automatically switch
back to normal display mode.
ALARM SETTING
To enter into the alarm setting mode:
1. Hold the ALM key for 4 seconds. The hour digits start flashing.
2. Press and release the + key to set the hour.
3. Press and release the ALM key to set the minutes. The minute digits start flashing.
4. Press and release the + key to set the minutes.
5. Press and release again the ALM key to exit the Alarm setting mode or wait for 15 seconds automatic
timeout.
TO DEACTIVATE THE ALARM:
The alarm will be automatically ON when the alarm time is set. To deactivate the alarm (OFF), press and
release once the ALM key in normal mode display. The alarm icon will disappear, the alarm is now off.
SNOOZE SETTING
The snooze can only be activated during alarm time for a snooze duration of 10 minutes by pressing the SNZ
key on the back of the clock
Alarm icon
((())) (ON)

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OUTDOOR TEMPERATURE TRANSMITTER:
The temperature is measured and transmitted to the atomic clock every 1 minute. The atomic clock will update
the temperature display every 5 minutes.
The range of the outdoor temperature transmitter may be affected by the temperature. At cold temperatures the
transmitting distance may be decreased. Please bear this in mind when positioning the transmitter. Also the
batteries may be reduced in power during periods of extreme cold temperatures.
433MHz RECEPTION CHECK FOR OUTDOOR TEMPERATURE TRANSMITTER
The atomic clock will receive the temperature data within 10 minutes. If the temperature data is not received 10
minutes after setting up (the display shows “- - -”), then please check the following points:
1. The distance of the atomic clock or outdoor temperature transmitter should be at least 6 feet away from any
interfering sources such as computer monitors or TV sets.
2. Avoid placing the receiver onto or in the immediate proximity of metal window frames.
3. Using other electrical products such as headphones or speakers operating on the same signal frequency
(433MHz) may prevent correct signal transmission and reception.
4. Neighbors using electrical devices operating on the 433MHz signal frequency can also cause interference.
Note:
When the 433 MHz signal is received correctly, do not re-open the battery cover of either the outdoor
temperature transmitter or atomic clock, as the batteries may spring free from the contacts and force a false
reset. Should this happen accidentally then reset all units (see Setting up above) otherwise transmission
problems may occur.
The maximum transmission range is 200 feet from the outdoor temperature transmitter to the atomic clock (in
open space). However, this depends on the surrounding environment and interference levels. If no reception is
possible despite the observation of these factors, all system units have to be reset (see Setting up). See our
website www.skyscaninfo.com for more information.
CHANGING THE DISPLAY MODE (DAY, SECONDS, AND TEMPERATURES)
There are four possible display modes to view the day, seconds, and temperatures.
The month&date/weekday/indoor temperature/outdoor temperature is the default.
To change the display:
1. Press the + key. The display should now show the month&date/weekday/seconds/outdoor temperature.
2. Press the + key a second time and the display will now show the month&date/weekday/indoor
temperature/seconds.
3. Press the + key third time and the display will now show the month&date/seconds/indoor
temperature/outdoor temperature
4. Press the + key a fourth time and the display will return to the default display.

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WWVB RADIO CONTROLLED TIME
The NIST radio station, WWVB, is located in Ft. Collins, Colorado and transmits the exact time signal
continuously throughout the United States at 60 kHz. The signal can be received up to 2,000 miles away through
the internal antenna in the atomic clock. However, due to the nature of the Earth’s Ionosphere, reception is very
limited during daylight hours. The atomic clock will search for a signal every night when reception is best. The
WWVB radio station derives its signal from the NIST atomic clock in Boulder, Colorado. A team of atomic
physicists continually measures every second of every day to an accuracy of ten billionths of a second a day.
These physicists have created an international standard, measuring a second as 9,192,631,770 vibrations of a
Cesium 133 atom in a vacuum. This atomic clock regulates the WWVB transmitter.
Once the outdoor temperature is displayed on the atomic clock, the WWVB tower icon in the clock display will
start flashing in the top center of the LCD. This indicates that the clock has detected a radio signal and is trying
to receive it. When the time code is received, the WWVB tower becomes permanently lit and the time will be
displayed.
If the tower icon flashes, but does not set the time or the WWVB tower does not appear at all, then please take
note of the following:
Recommended distance to any interfering sources like computer monitors or TV sets is a minimum of 6 feet.
Within ferro-concrete rooms (basements, superstructures), the received signal is naturally weakened. In
extreme cases, please place the unit close to a window and/ or point its front or back towards the Fort
Collins, Colorado, transmitter.
During nighttime, the atmospheric disturbances are usually less severe and reception is possible in most
cases. A single daily reception is adequate to keep the accuracy deviation below 1 second.
Note:
In case the atomic clock is not able to detect the WWVB-signal (disturbances, transmitting distance, etc.), the
time can be manually set (please refer to notes on Manual time setting) .
ICON DESCRIPTION:
POSITIONING
Before permanently mounting ensure that the atomic clock is able to receive WWVB signals from the desired
location. Also, extreme and sudden changes in temperature will decrease the accuracy of the atomic clock, and
changes in elevation will result with inaccurate temperatures readings for the next 12 to 24 hours. These changes
will require a 12 to 24 hour wait before obtaining reliable data.
Successful reception of
WWVB time signal
Currently searching for the
WWVB time signal (tower
blinking)
Unsuccessful reception of WWVB
signal. Will work as normal quartz
clock. Will search for the WWVB time
signal overnight.

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POSITIONING THE ATOMIC CLOCK:
There are two possible ways to mount the atomic clock:
use of the foldout table stand, or
wall mounting
FOLDOUT TABLE STAND
The foldout table stand leg is located on the backside. Pull the stand out from the bottom center edge of
the atomic clock, below the battery compartment. Once the foldout table stand is extended, place the
atomic clock in an appropriate location.
WALL MOUNTING
1) Using a straightedge, horizontally space at 2.36 inches (60 mm) three screw positions on a wall.
2) Install three mounting screws (not included) into a wall within transmission range—leaving
approximately 3/16 of an inch (5mm) extended from the wall.
3) Place the atomic clock onto the screws, using the hanging holes on the backside. Gently pull the
atomic clock down to lock the screws into place.
Note:
Always ensure that the atomic clock locks onto the screws before releasing.
POSITIONING THE OUTDOOR TEMPERATURE TRANSMITTER
To achieve a true temperature reading, avoid mounting where direct sunlight can reach the outdoor temperature
transmitter. It is recommended to mount the outdoor temperature transmitter on a North-facing wall or in any
well shaded area. The maximum transmitting range is 200 feet obstacles such as walls, concrete, and large metal
objects can reduce the range.
Place both units in their desired location, and wait approximately 10 minutes before permanently mounting to
ensure that there is proper reception. The outdoor temperature transmitter is not waterproof and should not be
placed anywhere it will become submerged in water or be directly in the rain.
The outdoor temperature transmitter can be mounted in two ways:
with the use of screws, or
using the adhesive tape.
MOUNTING WITH SCREWS
1) Remove the mounting bracket from the outdoor temperature transmitter.
2) Place the mounting bracket over the desired location. Through the three screw holes of the
bracket, mark the mounting surface with a pencil.
3) Where marked, start the screw holes into mounting surface.
4) Screw mounting bracket onto the mounting surface. Ensure that the screws are flush with
the bracket.

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MOUNTING WITH ADHESIVE TAPE
1) With a nonabrasive solution, clean and dry the back of the mounting bracket and the
mounting surface to ensure a secure hold. The mounting surface should be smooth and
flat.
2) Remove the protective strip from one side of the tape. Adhere the tape to the designated
area on the back of the mounting bracket.
3) Remove the protective strip from the other side of the tape. Position the outdoor
temperature transmitter in the desired location, ensuring that the atomic clock can receive the signal.
TROUBLESHOOTING:
Problem:
The LCD is faint.
Solution:
1) Replace the batteries.
Problem:
No reception of WWVB signal
Solution:
1) It may help reception to face the front or
back of the atomic clock in the general
direction of Ft. Collins, Colorado.
2) Wait overnight for signal.
3) Be sure the atomic clock is at least 6
feet (2 meters) from any electrical
devices, i.e. TV sets, computers, or
other radio controlled clocks.
4) Remove batteries for ten minutes. See
setting up.
Problem:
Hour is incorrect (minute and date are
correct).
Solution:
1) Be sure the correct time zone and
daylight saving time are selected.
Problem:
"OF.L“ appears in the indoor temperature
section of the LCD
Solution:
1) Move the atomic clock to an area with
warmer or cooler surrounding
temperature. Current surrounding
temperatures are outside measuring
range.

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Problem:
"--.-" appears in the outdoor temperature
section of the LCD.
Solution:
1) Remove the batteries of both units for
ten minutes, then reinsert them again.
Make sure the batteries are new and
fresh. See setting up.
2) Move the atomic clock closer to the
transmitter or place the transmitter
closer to the atomic clock. Make sure
the clock is at a receivable range from
the transmitter.
3) Move the units to another location.
Interferences from other electrical
devices operating on the same signal
frequency (433MHz) may prevent
correct signal transmission and
reception.
Problem:
"OF.L“ appears in the outdoor temperature
section of the LCD.
Solution:
1) Wait until the current surrounding
temperature cools down or increases.
Current temperature is outside of the
measuring range of the transmitter or
has temporary affected battery strength.
The outdoor temperature will be
displayed again once the current
surrounding temperature is within the
range of the transmitter.
CARE AND MAINTENANCE:
Avoid placing the units in areas prone to vibration and shock as these may cause damage.
Avoid areas where the units can be exposed to sudden changes in temperature, i.e. direct sunlight, extreme
cold and wet/moist conditions as these will lead to rapid changes which reduces the accuracy of readings.
When cleaning the LCD and casing, use a soft damp cloth only. Do not use solvents or scouring agents.
Do not submerge the units into 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 repairs to the units. Please return it to the original point of purchase. Opening and tampering
with the units may invalidate the warranty.

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SPECIFICATIONS:
Temperature measuring range
Indoor: +32ºF to +122ºF with 0.2ºF resolution
0ºC to +50ºC with 0.1ºC resolution
("OF.L" displayed if outside this range)
Outdoor : -21.8ºF to +157.8ºF with 0.2ºF resolution
-29.9ºC to +69.9ºC with 0.1ºC resolution
("OF.L“ displayed if outside this range)
Temperature checking interval
Indoor: every 10 seconds
Outdoor: every 5 minutes
Transmission distance: maximum 200 feet in open field, depending upon surrounding structures, mounting
location and possible interfering sources (see www.skyscaninfo.com for additional information).
Power source (Alkaline batteries recommended)
Atomic clock : 2 x AA, 1.5V batteries
Transmitter: 2 x AA, 1.5V batteries
Battery life: about 12 months
Dimensions (L x W x H)
Atomic clock : 10.03“ x 1.22“ x 9.56“ / 255 x 31 x 243mm
Transmitter: 1.57“ x 0.9“ x 5.04“ / 40 x 23 x 128 mm
LIABILITY DISCLAIMER:
The manufacturer and supplier cannot accept any responsibility for any incorrect readings and any
consequences that occur should an inaccurate reading take place.
This product is only designed for use in the home or office.
This product is not to be used for medical purposes or for public information.
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 authorization of the manufacturer.
WARRANTY:
This product is warranted to be free of defects in manufacturing for 1 year after purchase at Sams Club. This
model is discontinued and is not eligible for the manufacturer’s warranty. Defective clocks should be returned
to the place of retail purchase.
BATTERIES CHANGE:
For best performance, batteries should be replaced at least once a year to maintain the best running accuracy.
Ensure that the batteries used are new and the correct size.
Please help in the preservation of the environment and return used batteries to an authorized
depot.
WARNING!
Do not mix old and new batteries.
Do not mix alkaline, standard (carbon-zinc), or rechargeable (nickel cadmium) batteries.