SkyScan 88900 User manual

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®
ATOMIC CLOCK WITH OUTDOOR WIRELESS
TEMPERATURE
AND MOON PHASE
MODELS 88900/01/02
Instruction Manual
FEATURES:
WWVB Radio controlled time with manual time setting
12/24 hour time display
Time display: hour, minute, second optional
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)
ºF or ºC temperature display selectable
Indoor temperature display
Outdoor temperature display via 915MHz transmission
Wall mount or freestanding
Current moon phase display
Low battery indicator

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OUTDOOR TEMPERATURE SENSOR:
Remote transmission of outdoor temperature to the atomic clock by 915
MHz signals
Wall mounting case
TO INSTALL AND REPLACE BATTERIES IN THE TEMPERATURE SENSOR
The sensor 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.
4.
Alkaline batteries are recommended for use in both units. Avoid using rechargeable batteries.
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. Insert finger or other solid object in the space at the bottom center of the battery compartment
and lift up to remove the cover.
2. Insert batteries observing the correct polarity (see marking inside battery compartment).
3. Replace compartment cover.
DO NOT SET THE CLOCK.

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SETTING UP:
Alkaline batteries are recommended for use in both units. Avoid using rechargeable batteries.
NOTE: Do not set the clock until the outdoor temperature is displayed.
1. Place batteries in the outdoor sensor first, then into the atomic clock. DO NOT PRESS ANY
BUTTONS FOR 10 MINUTES.
2. Once the batteries are in place, all segments of the LCD will light up briefly. Following the
indoor temperature, date, weekday, and the time, as 12:00, will be displayed. If they are not
shown in LCD after 60 seconds, remove the batteries and wait for at least 60 seconds before
reinserting them. Once the indoor data is displayed proceed to the next step.
3. After the batteries are inserted, the atomic clock will start receiving data signal from the sensor.
The outdoor temperature should then be displayed on the atomic clock. If this does not happen
after 3minutes, the batteries will need to be removed from both units and reset from step 1 and
the signal reception icon is no longer shown.
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, date, weekday, 12/24 hour,
ºC or ºF temperature display
+ key : To toggle between the second, temperature or weekday display
To change any values in manual set mode
To change values in alarm set mode
ALM key : To enter into the alarm set mode
To display the alarm time in normal mode display
To set the alarm ON/OFF
SNZ key : To activate the snooze function during alarm
To exit the setting modes

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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
ºF or ºC setting
TIME ZONE SETTING
After entering the manual setting mode as described above, the time zone can be set between the
+12 to –12 hour or Greenwich Mean Time (GMT) range in LCD1. To do this:
The time zone (LCD1) will start flashing (Default setting "-5“). Select the desired time zone by
pressing and releasing the +key.
Note: North American Time Zones are negative numbers. The time zones from –4 to –10 hours
will be displayed with 3 characters abbreviations:
ATL -4 (Atlantic time),
EST -5 (Eastern time; default time zone),
CST -6 (Central time),
MST -7 (Mountain time),
PST -8 (Pacific time),
ALA -9 (Alaska time),
HAW -10 (Hawaii time).
GMT 0 will be displayed if set to GMT (0h).

2. Press and release the SET key to enter the “DST Setting“.

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DST SETTING (daylight saving time)
1. The ON digit will start flashing on LCD2. 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: US English=US, French=F,
Spanish=E and German= d.
1. Set the desired language for the weekday display in LCD2 by use of the + key.
2. Press and release the SET key to enter the mode “Manual Time Setting”.
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.

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1. The hour digits will start flashing on LCD2.
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 next hour.
WWVB reception occurs daily at 12:00 am and 06:00 am. If the reception is not successful at 12:00
am, then the next reception takes place the next hour and so on until 06:00am, or until the reception
is successful. If the reception is not successful at 06:00 am, then the next attempt will take place the
next day at 12:00 am.
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 2001 to 2029 and will then start over again (default
setting 2006). Only the last 2 digits of the year will be visible on LCD1.
1. The year digits will start flashing on LCD1. 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 LCD1 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”.

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DATE SETTING
1. The digits for the date will start flashing on LCD1 (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 LCD1 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”.
12/24 HOURS TIME DISPLAY SETTING
1. The “12”or “24” will start flashing in LCD2 (Default setting 12h). Select the desired time
display mode by use of the + key.
2. Press and release the SET key to enter the “ºF/ºC Temperature Setting“.
°F OR °C TEMPERATURE SETTING
1. The characters “°F” or “°C” will start flashing on LCD2 (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.

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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
OUTDOOR TEMPERATURE SENSOR:
The temperature is measured and transmitted to the atomic clock every 4 seconds. The atomic clock
will update the outdoor temperature display every 4 seconds.
The range of the outdoor temperature sensor may be affected by the temperature. At cold
temperatures the transmitting distance may be decreased. Please bear this in mind when positioning
the sensor. Also the batteries may be reduced in power during periods of extreme cold
temperatures.
Alarm icon
((())) (ON)

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915MHz RECEPTION CHECK FOR OUTDOOR TEMPERATURE SENSOR
The atomic clock will receive the temperature data within 3 minutes. If the temperature data is not
being received 3 minutes after setting up (the display shows “- - -”), then please check the
following points:
1. The distance of the atomic clock or outdoor temperature sensor should be at least 6 feet (2
meters) 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 (915MHz) may prevent correct signal transmission and reception.
4. Neighbors using electrical devices operating on the 915MHz signal frequency can also cause
interference.
Note:
When the 915 MHz signal is received correctly, do not re-open the battery cover of either the
outdoor temperature sensor 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 300 feet from the outdoor temperature sensor 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).
CHANGING THE DISPLAY MODE (DAY, SECONDS, AND TEMPERATURES)
There are 4 possible display modes to view the day, seconds, and temperatures.
The weekday/month&date//indoor temperature/outdoor temperature is the default.
To change the display:
1. Press the + key. The display should now show the weekday/month&date/seconds/outdoor
temperature.
2. Press the + key a second time and the display will show the weekday/month&date/indoor
temperature/seconds.
3. Press the + key a third time and the display will show the seconds/month&date/indoor
temperature/outdoor temperature.
4. Press the + key a fourth time and the display will return to the normal 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 (2 meters).
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).

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MOON PHASE
The Moon Phases appear in LCD3. Moon Phase is based on the month, date & year being correct.
There are 12 visible Moon Phases that will show in the LCD3:
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
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 temperature readings for
the next 12 to 24 hours. These changes will require a 12 to 24 hour wait before obtaining reliable
data.
To achieve a true temperature reading, avoid mounting where direct sunlight can reach the outdoor
temperature sensor. It is recommended to mount the outdoor temperature sensor on a North-facing
wall or in any well shaded area. The maximum transmitting range is 300 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 sensor is not waterproof
and should not be placed anywhere it will become submerged in water or be directly in the rain.
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.

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WALL MOUNTING
1) Using a straightedge, horizontally space 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 SENSOR
The remote temperature sensor can be mounted with the use of screws. The sensor is water
resistant, but not waterproof. Mount it out of direct sunlight and rain, such as under the eave of
your roof. Mount the 9X transmitter right side up to decrease any water damage.
MOUNTING WITH SCREWS
1) Remove the mounting bracket from the remote temperature sensor.
2) Place the mounting bracket over the desired location.
3) Through the two screw holes of the bracket, mark the mounting surface
with a pencil.
4) Screw mounting bracket onto the mounting surface. Ensure that the screws
are flush with the bracket.
5) Insert the remote temperature sensor into the bracket.

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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 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 five minutes, reinsert
and leave the unit alone overnight without
pressing any keys.
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.
2) Change batteries.

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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.
2) Move the atomic clock closer to the sensor
or place the sensor closer to the atomic
clock. Make sure the clock is at a receivable
range from the sensor.
3) Move the units to another location.
Interferences from other electrical devices
operating on the same signal frequency
(915MHz) 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 sensor. The outdoor
temperature will be displayed again once the
current surrounding temperature is within
the range of the sensor.
2) Change Batteries
3) Please see all basic troubleshooting info as
well
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 : 14.1ºF to 100ºF with 0.2ºF resolution
-9.9ºC to +37.8ºC with 0.1ºC resolution
("OF.L" displayed if outside this range)
Outdoor : -39.9ºF to +139.8ºF with 0.2ºF resolution
-39.8ºC to +59.9ºC with 0.1ºC resolution
("OF.L“ displayed if outside this range)
Temperature checking interval
Indoor : every 20 seconds
Outdoor : every 4 seconds
Transmission distance: maximum 300 feet 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
Sensor : 2 x AA, 1.5V batteries
Battery life : about 24 months
Dimensions (L x W x H)
Atomic clock : 12.20“ x 1.18“ x 8.03“
Sensor : 5.05” x 1.50” x 0.83”
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.

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WARRANTY:
This product is warranted to be free of defects in manufacturing for 1 year after purchase from
Sams Club.
This model is discontinued and not eligible for the manufacturer’s warranty. Defective clocks
should be returned to the place of retail purchase.
BATTERY 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.