background image

Alarm time mode

1.  Alarm time

2.  Alarm icon/Alarm on

3.  Alarm mode indicator

1

2 3

No signal quality

Weak signal quality

Acceptable signal quality

Excellent signal quality

6

7

8

1

2

3

5

9

4

10

RADIO CONTROLLED CLOCK 

WITH TEMPERATURE AND HUMIDITY

Model: C8461A

USER MANUAL

Thank you for purchasing this delicate radio clock with temperature and 

humidity. Utmost care has gone into the design and manufacture of the clock. 

This manual is used for WWVB version. Please read the instructions carefully 

according to the version you purchased and keep the manual well for future 

reference. 

GETTING STARTED

   Remove the battery door.

   Insert 4 new AA size batteries according to the 

“+/-”

 polarity mark on the

     battery compartment.

   Replace the battery door.

   Once the batteries are inserted, full segment of the LCD will be shown before

     entering the radio controlled time reception mode.

   The RC clock will automatically start scanning for the radio controlled time 

     signal in 8 seconds.

NOTE:

If no display appears on the LCD after inserting the batteries, press the 

[ RESET ]

 button 

by using a metal wire. In some cases, you may not receive the signal immediately. Due to 
the atmospheric disturbance, the best reception often occurs during nighttime.

DAYLIGHT SAVING TIME (DST)

The clock will automatically advance the time by one hour in the spring and back 

an hour in the fall, provided that the DST function is not turned off.

DST function is set to AUTO by default.

RECEPTION OF RADIO CONTROLLED SIGNAL

This RC clock includes a built-in receiver which picks up the signal from the   

WWVB station. Therefore, the clock automatically sets the time, date and 

weekday. 

   The clock automatically carries out four periodic synchronization procedures 

     (at 2:00 AM, 8:00 AM, 2:00 PM and 8:00 PM daily) with the RC signal to 

     correct any deviations to the exact time.

   Once the unit synchronizes successfully to the RC signal, the signal icon 

     

“     ”

 will show up. Each synchronization process will take between 6 to 16 

     minutes.

   To manually start or stop the RC signal reception, press 

[ RCC ]

 button.

NOTE:

    The strength of radio-controlled time signal from the transmitter tower may be affected 

      by geographical location or building around. 

    Always place the unit away from interfering sources such as TV set, computer, etc.

    Avoid placing the unit on or next to metal plates.

    Closed areas such as airport, basement, tower block, or factory are not recommended.

SIGNAL RECEPTION INDACATOR

The signal indicator displays signal strength in 4 levels. Wave segment flashing 

means time signals are being received. The signal quality could be classified 

into 4 types:

TIME ZONE SETTING 

Your clock is designed to display time for different time zones. Please refer to 

the 

SETTING THE TIME AND CALENDAR

 section to set your desired time 

zone in following order:

PST 

(Pacific) 

 MST 

(Mountain) 

 CST 

(Central) 

 EST 

(Eastern) 

 

AST 

(Alaska) 

 NST 

(Northern) 

1

2

3

4

5

6

7

8

9

10

11

11

12

1.  

[ TIME SET ]

 button

2.  

[ + ]

 button

3. 

 [ - ]

 button

4.  

[ SNOOZE ]

 button

5.  

[ ALARM SET ]

 button

6.  Wall-mounting hole

Normal time mode

1.  AM/PM (12 Hour format)

2.  Time

3.  Low battery indicator

4.  DST

5.  Signal strength indicator

6.  Month-Date / Year 

7.  Weekday

8.  Temperature

9.  Humidity

10.Time zone indicator 

7.  

< °C/°F >

 slide switch

8.  

[ YEAR ]

 button

9.  

[ RCC ]

 button

10. 

[ RESET ]

 button

11. Table stand

12. Battery door

No signal quality

Weak signal quality

Acceptable signal quality

Excellent signal quality

6

7

8

1

2

3

5

9

4

10

RADIO CONTROLLED CLOCK 

WITH TEMPERATURE AND HUMIDITY

Model: C8461A

USER MANUAL

Thank you for purchasing this delicate radio clock with temperature and 

humidity. Utmost care has gone into the design and manufacture of the clock. 

This manual is used for WWVB version. Please read the instructions carefully 

according to the version you purchased and keep the manual well for future 

reference. 

PRODUCT OVERVIEW

C

LOCK

DISPLAY 

GETTING STARTED

   Remove the battery door.

   Insert 4 new AA size batteries according to the 

“+/-”

 polarity mark on the

     battery compartment.

   Replace the battery door.

   Once the batteries are inserted, full segment of the LCD will be shown before

     entering the radio controlled time reception mode.

   The RC clock will automatically start scanning for the radio controlled time 

     signal in 8 seconds.

NOTE:

If no display appears on the LCD after inserting the batteries, press the 

[ RESET ]

 button 

by using a metal wire. In some cases, you may not receive the signal immediately. Due to 
the atmospheric disturbance, the best reception often occurs during nighttime.

DAYLIGHT SAVING TIME (DST)

The clock will automatically advance the time by one hour in the spring and back 

an hour in the fall, provided that the DST function is not turned off.

DST function is set to AUTO by default.

RECEPTION OF RADIO CONTROLLED SIGNAL

This RC clock includes a built-in receiver which picks up the signal from the   

WWVB station. Therefore, the clock automatically sets the time, date and 

weekday. 

   The clock automatically carries out four periodic synchronization procedures 

     (at 2:00 AM, 8:00 AM, 2:00 PM and 8:00 PM daily) with the RC signal to 

     correct any deviations to the exact time.

   Once the unit synchronizes successfully to the RC signal, the signal icon 

     

“     ”

 will show up. Each synchronization process will take between 6 to 16 

     minutes.

   To manually start or stop the RC signal reception, press 

[ RCC ]

 button.

NOTE:

    The strength of radio-controlled time signal from the transmitter tower may be affected 

      by geographical location or building around. 

    Always place the unit away from interfering sources such as TV set, computer, etc.

    Avoid placing the unit on or next to metal plates.

    Closed areas such as airport, basement, tower block, or factory are not recommended.

SIGNAL RECEPTION INDACATOR

The signal indicator displays signal strength in 4 levels. Wave segment flashing 

means time signals are being received. The signal quality could be classified 

into 4 types:

TIME ZONE SETTING 

Your clock is designed to display time for different time zones. Please refer to 

the 

SETTING THE TIME AND CALENDAR

 section to set your desired time 

zone in following order:

PST 

(Pacific) 

 MST 

(Mountain) 

 CST 

(Central) 

 EST 

(Eastern) 

 

AST 

(Alaska) 

 NST 

(Northern) 

1

2

3

4

5

6

7

8

9

10

11

11

12

1.  

[ TIME SET ]

 button

2.  

[ + ]

 button

3. 

 [ - ]

 button

4.  

[ SNOOZE ]

 button

5.  

[ ALARM SET ]

 button

6.  Wall-mounting hole

Normal time mode

1.  AM/PM (12 Hour format)

2.  Time

3.  Low battery indicator

4.  DST

5.  Signal strength indicator

6.  Month-Date / Year 

7.  Weekday

8.  Temperature

9.  Humidity

10.Time zone indicator 

Alarm time mode

1.  Alarm time

2.  Alarm icon/Alarm on

3.  Alarm mode indicator

7.  

< °C/°F >

 slide switch

8.  

[ YEAR ]

 button

9.  

[ RCC ]

 button

10. 

[ RESET ]

 button

11. Table stand

12. Battery door

1

2 3

No signal quality

Weak signal quality

Acceptable signal quality

Excellent signal quality

RADIO CONTROLLED CLOCK 

WITH TEMPERATURE AND HUMIDITY

Model: C8461A

USER MANUAL

Thank you for purchasing this delicate radio clock with temperature and 

humidity. Utmost care has gone into the design and manufacture of the clock. 

This manual is used for WWVB version. Please read the instructions carefully 

according to the version you purchased and keep the manual well for future 

reference. 

PRODUCT OVERVIEW

C

LOCK

DISPLAY 

GETTING STARTED

   Remove the battery door.

   Insert 4 new AA size batteries according to the 

“+/-”

 polarity mark on the

     battery compartment.

   Replace the battery door.

   Once the batteries are inserted, full segment of the LCD will be shown before

     entering the radio controlled time reception mode.

   The RC clock will automatically start scanning for the radio controlled time 

     signal in 8 seconds.

NOTE:

If no display appears on the LCD after inserting the batteries, press the 

[ RESET ]

 button 

by using a metal wire. In some cases, you may not receive the signal immediately. Due to 
the atmospheric disturbance, the best reception often occurs during nighttime.

DAYLIGHT SAVING TIME (DST)

The clock will automatically advance the time by one hour in the spring and back 

an hour in the fall, provided that the DST function is not turned off.

DST function is set to AUTO by default.

RECEPTION OF RADIO CONTROLLED SIGNAL

This RC clock includes a built-in receiver which picks up the signal from the   

WWVB station. Therefore, the clock automatically sets the time, date and 

weekday. 

   The clock automatically carries out four periodic synchronization procedures 

     (at 2:00 AM, 8:00 AM, 2:00 PM and 8:00 PM daily) with the RC signal to 

     correct any deviations to the exact time.

   Once the unit synchronizes successfully to the RC signal, the signal icon 

     

“     ”

 will show up. Each synchronization process will take between 6 to 16 

     minutes.

   To manually start or stop the RC signal reception, press 

[ RCC ]

 button.

NOTE:

    The strength of radio-controlled time signal from the transmitter tower may be affected 

      by geographical location or building around. 

    Always place the unit away from interfering sources such as TV set, computer, etc.

    Avoid placing the unit on or next to metal plates.

    Closed areas such as airport, basement, tower block, or factory are not recommended.

SIGNAL RECEPTION INDACATOR

The signal indicator displays signal strength in 4 levels. Wave segment flashing 

means time signals are being received. The signal quality could be classified 

into 4 types:

TIME ZONE SETTING 

Your clock is designed to display time for different time zones. Please refer to 

the 

SETTING THE TIME AND CALENDAR

 section to set your desired time 

zone in following order:

PST 

(Pacific) 

 MST 

(Mountain) 

 CST 

(Central) 

 EST 

(Eastern) 

 

AST 

(Alaska) 

 NST 

(Northern) 

1

2

3

4

5

6

7

8

9

10

11

11

12

1.  

[ TIME SET ]

 button

2.  

[ + ]

 button

3. 

 [ - ]

 button

4.  

[ SNOOZE ]

 button

5.  

[ ALARM SET ]

 button

6.  Wall-mounting hole

Normal time mode

1.  AM/PM (12 Hour format)

2.  Time

3.  Low battery indicator

4.  DST

5.  Signal strength indicator

6.  Month-Date / Year 

7.  Weekday

8.  Temperature

9.  Humidity

10.Time zone indicator 

Alarm time mode

1.  Alarm time

2.  Alarm icon/Alarm on

3.  Alarm mode indicator

7.  

< °C/°F >

 slide switch

8.  

[ YEAR ]

 button

9.  

[ RCC ]

 button

10. 

[ RESET ]

 button

11. Table stand

12. Battery door

1

2 3

No signal quality

Weak signal quality

Acceptable signal quality

Excellent signal quality

6

7

8

1

2

3

5

9

4

10

RADIO CONTROLLED CLOCK 

WITH TEMPERATURE AND HUMIDITY

Model: C8461A

USER MANUAL

Thank you for purchasing this delicate radio clock with temperature and 

humidity. Utmost care has gone into the design and manufacture of the clock. 

This manual is used for WWVB version. Please read the instructions carefully 

according to the version you purchased and keep the manual well for future 

reference. 

PRODUCT OVERVIEW

C

LOCK

DISPLAY 

GETTING STARTED

   Remove the battery door.

   Insert 4 new AA size batteries according to the 

“+/-”

 polarity mark on the

     battery compartment.

   Replace the battery door.

   Once the batteries are inserted, full segment of the LCD will be shown before

     entering the radio controlled time reception mode.

   The RC clock will automatically start scanning for the radio controlled time 

     signal in 8 seconds.

NOTE:

If no display appears on the LCD after inserting the batteries, press the 

[ RESET ]

 button 

by using a metal wire. In some cases, you may not receive the signal immediately. Due to 
the atmospheric disturbance, the best reception often occurs during nighttime.

DAYLIGHT SAVING TIME (DST)

The clock will automatically advance the time by one hour in the spring and back 

an hour in the fall, provided that the DST function is not turned off.

DST function is set to AUTO by default.

RECEPTION OF RADIO CONTROLLED SIGNAL

This RC clock includes a built-in receiver which picks up the signal from the   

WWVB station. Therefore, the clock automatically sets the time, date and 

weekday. 

   The clock automatically carries out four periodic synchronization procedures 

     (at 2:00 AM, 8:00 AM, 2:00 PM and 8:00 PM daily) with the RC signal to 

     correct any deviations to the exact time.

   Once the unit synchronizes successfully to the RC signal, the signal icon 

     

“     ”

 will show up. Each synchronization process will take between 6 to 16 

     minutes.

   To manually start or stop the RC signal reception, press 

[ RCC ]

 button.

NOTE:

    The strength of radio-controlled time signal from the transmitter tower may be affected 

      by geographical location or building around. 

    Always place the unit away from interfering sources such as TV set, computer, etc.

    Avoid placing the unit on or next to metal plates.

    Closed areas such as airport, basement, tower block, or factory are not recommended.

SIGNAL RECEPTION INDACATOR

The signal indicator displays signal strength in 4 levels. Wave segment flashing 

means time signals are being received. The signal quality could be classified 

into 4 types:

TIME ZONE SETTING 

Your clock is designed to display time for different time zones. Please refer to 

the 

SETTING THE TIME AND CALENDAR

 section to set your desired time 

zone in following order:

PST 

(Pacific) 

 MST 

(Mountain) 

 CST 

(Central) 

 EST 

(Eastern) 

 

AST 

(Alaska) 

 NST 

(Northern) 

© 2015 Chung’s Electronic Co., Ltd. All rights reserved.

                                           Rev-0  2015-5-29 17:10 PM

Area

Temperature

Humidity

Temperature<-40°C

Lo

HI

Lo

HI
---

Temperature>70°C

Temperature<0°C or >60°C

Humidity<20%
Humidity>90%

Condition

Display

VIEW YEAR

In normal time mode, press 

[ YEAR ]

 button to display Year for 5 seconds.

TEMPERATURE AND HUMIDITY DISPLAY

Slide the 

<°C/°F>

 switch to select the temperature unit °C or °F.

The temperature and humidity will display 

“Hi/Lo/---”

 on the conditions in the 

following chart:

BATTERAY REPLACEMENT

When the low battery indicator 

“       ”

 displays, it indicates that the battery 

power is not enough. You should replace with 4 AA size batteries at once.

NOTE:

   If the clock is not used for a long time, please take off the batteries.

   Attention! Batteries should not be exposed to excessive heat such as sunshine, fire or

     the like. Please dispose of used unit or batteries in an ecologically safe manner.

SPECIFICATIONS

Radio controlled signal:       WWVB

TEMPERATURE

Display range:                     -40°C~70°C (-40°F~158°F)

Operating range:                 0°C~45°C (32°F~113°F)

Accuracy:                            

                                            -5°C~-0.1°C:              +/-2°C

                                            0°C~40°C:                 +/-1°C

                                            40.1°C~50°C:            +/-2°C

                                          ( 23°F~32°F:                +/-4°F

                                            33°F~86°F:                +/-2°F

                                            87°F~122°F:              +/-4°F )

HUMIDITY

Display range:                     20%~90%

Accuracy: 

                                            20% RH~40% RH:     +/-7% RH

                                            41% RH~70% RH:     +/-5% RH

                                            71% RH~90% RH:     +/-7% RH

POWER

                                            4 x AA size 1.5V batteries (Alkaline recommended)

DIMENSION

                                            430(L) x 288(H) x 33(D) mm

          

www.

.com

[email protected]

1.800.561.8187

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