Model 86730

®     ATOMIC CLOCK  WITH MOON PHASE   MODEL 86730 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. Insert batteries observing the correct polarity (see marking inside battery compartment).

3. Replace compartment cover.

DO NOT SET THE CLOCK.   SETTING UP:    1. The default (factory) time zone is Eastern Standard Time. If you are not in the Eastern Standard Time zone, set your time zone using the manual settings below.

2. The WWVB time code reception will automatically start. This reception typically takes between 5-10 minutes in good conditions or overnight in poor conditions or long distances from Colorado. If after 10 minutes, the WWVB time has not been received, use the “SET” key to manually enter the set-up mode and change either the time or date in order to activate the WWVB reception (see manual settings below). 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     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. Therefore, 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


. Language display setting

. Manual time setting

. Year setting

. Month setting

. Date setting

. Weekday setting

. 12/24 hour time display setting

. ºC or ºF setting

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”.

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”.

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.



Alarm icon (((.))) (ON)


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   CHANGING THE DISPLAY MODE (DAY, SECONDS, AND TEMPERATURE)  There are four possible display modes to view the day, seconds, and temperatures.  The month&date/weekday/indoor temperature/ is the default.   To change the display:   1. Press the + key.  The display should now show the month&date/weekday/seconds.

2. Press the + key a second time and the display will now show the month&date/seconds/indoor temperature.

3. Press the + key a third time and the display will return to the default display.

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.   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). Icon description:

Sucessful reception of WWVB time signal


Currently searching for the WWVB time signal (tower blinking)

Unsucessful reception of WWVB signal. Will work as normal quartz clock. Will search for the WWVB time signal overnight.


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.   POSITIONING THE ATOMIC CLOCK:   There are two possible ways to mount the atomic clock: . use of the foldout legs, or

. wall mounting

FOLD OUT LEGS   The foldout legs are located on the backside. Pull the legs out from the bottom edge of the atomic clock, below the battery compartment. Once the foldout legs are extended, place the atomic clock in an appropriate location.  WALL MOUNTING

1) Using a straightedge, horizontally space at 4 inches (100 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.     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.

CARE AND MAINTENANCE:   . Avoid placing the unit 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 reduce 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 unit 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 unit. Please return it to the original point of purchase. Opening and tampering with the units may invalidate the warranty.

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)   Temperature checking interval   Indoor:  every 10 seconds   Power source (Alkaline batteries recommended)   Atomic clock:  2 x AA, 1.5V batteries Battery life:  about 12 months   Dimensions (L x W x H)   Atomic clock: 12.20“ x 1.18“ x 8.03“ / 310 x 30 x 204mm       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 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.

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