Citizen JNOXXX CTZ-B6770 Instruction Manual Download Page 3

1. Press button 

A

to start timing

2. When the car you are timing completes one lap,

press button 

A

to stop timing.

2.

• In the digital display “BEST LAP” will appear.

2.

• km an hour of the lap will display. Only between

“0.0 – 999.9” km per hour can be displayed.

2.

• Over 1000 km per hour “---.-” will display.

3. After several laps, to time other cars, press button

A

again. The watch will start timing from “0” again.

4. When the car you are timing completes the lap

press button 

A

.

• If the timing of the lap is faster than previous

times “BEST LAP” in the digital display will
appear. If the lap is slower, just “LAP” will appear.

5. Press button 

A

you can repeat the start/stop

function.
• The number of timings display is up to “99”.

After that it will continue from “0” again.

6. When one race has finished and you wish to

time the next race, press button 

C

to reset the

chronograph.

• The time, and number of timings will be reset to

“0”.

1. Press button 

A

to start timing.

2. Press button 

C

to measure the lap time of the

present lap.

2.

• The lap time will display. (The watch automatically

starts timing the next lap.)

2.

• “BEST LAP” will display.

2.

• km an hour of this lap will display.

2.

• After displaying this data for 10 seconds, it will

automatically change to the next lap timing
display.

2.

• At that time, the number of timings display will

change from “1” to “2”.

3. Repeat this operation for every lap.

(Press button 

C

to measure the lap time.)

3.

• When the lap is the fastest yet “BEST LAP” in

the digital will appear, in other cases “LAP” will
appear.

3.

• The number of timings display is up to “99”

after that it will continue counting from “0”.

4. When the last lap of the race ends press button

A

to complete timing.

5. When you wish to measure time the next race,

press button 

C

to reset the chronograph.

Until the chronograph is used
again, the memory data can be
retrieved. The memorised items
are as follows:

• Best lap display
• Average lap time display
• Total time display

<Note>
If you reset the chronograph,
then start timing all memorised
data will be deleted. So if the
data is needed, it would pay to
make a memo. Calling up to
chronograph memo.

1. Press button 

C

to reset the chronograph.

• All displays change to “0”.

2. Press button 

C

again

• It changes to the best lap display

3. Press button 

C

• It changes to the average lap time display

4. Press button 

C

• It changes to the total time display.

5. Press button 

C

again to return to the reset

mode.

I. Convenient Function to Note
When the display is difficult to read due to the
analogue hands converting the display.
In that case, it is possible to move the hands using
the “Hands retractor function”. Pressing button 

B

for 2 seconds or more, hour, minute, second hands
will continue to retract until the 12 o’clock position.
If you press button 

B

while the hand will stop at

that position, and be in the hand retractor condition.

[Cancellation of the hands retractor function]
Press button 

B

, The hands retractor function will

cancel. The hour, minute hands will fast forward to
the correct time.
<Note>
When using the chronograph while the hands retractor
function is operating, all hands are stationary.

Using the dual time
Setting the local time 
(to another city).
1. Set the watch to (Time/Calendar) mode.
2. Depress button 

A

for 2 seconds or more.

• The hour and minute hands advance only 30

minutes. (The time difference between countries
around the world are in 30 minute intervals.)

3. Depress button 

C

for 2 seconds or more.

• The hour, minute hands will backward for 30

minutes.

4. Perform these operations (2 or 3) to adjust the

local time.

[Cancellation of the local time]
Cancellation of the local time,
press button 

A

and

C

simultaneously.

When timing one lap

When you time continuous laps

Retrieving memorised data

Calling up to 
chronograph memo

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