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H864 Instruction manual
Poor reception areas
It may be difficult to receive the time signal properly under certain environmental
conditions or in areas susceptible to radio noise.
• Extremely hot or cold locations
• Inside vehicles
• Near electrical equipment or office appliances
• Near high-voltage electric cables, railway overhead cables, airports (transmission
facilities)
• Inside reinforced concrete buildings, between tall buildings, mountains, or
underground
• Near mobile phones or smartphones that are in use
Note on the time signal
This watch receives time signals from the five signal stations located in four regions
in the world to adjust time and calendar automatically.
Signal stations
Kind of the
time signal
Receivable distance
A
Fukushima station (Japan)
JJY
Approx. 1500km
B
Kyushu station (Japan) Approx. 2000km
C
Fort Collins station (Denver, United States) WWVB Approx. 3000km
D
Mainflingen station (Germany) DCF77 Approx. 1500km
E
Shangqiu station (Henan, China) BPC Approx. 1500km
• The distance of receivable range is only used as an approximate value. The
receivable range is often affected by the following conditions: receiving
environment, time, weather, (lightning), and so on.
A
B
C
D E
Receiving the time signal
Checking the previous signal reception result
1
Push the crown in to position
0
.
2
Press and release the lower right button
A
.
The function hand hand indicates the result of the last signal reception.
OK
Reception was successful.
NO
Reception failed.
• Press the button again to return to normal indication. The hand returns to normal
indication automatically in 10 seconds without pressing the button.
• If you had operated the crown after the previous signal reception, the function
hand points “
NO
” regardless the reception result.
Receiving the time signal manually
• It takes 2 - 30 minutes to finish signal reception.
1
Push the crown in to position
0
.
2
Press and hold the lower right button
A
for 2 seconds.
The function hand points “
RX
” and signal reception starts.
3
Put the watch in the place with good conditions for time signal reception.
• Do not move the watch as far as possible while the function hand points “
RX
”.
• The watch returns to normal indication after the reception finished.
To cancel signal reception
Pressing and holding the lower right button
A
for 2 seconds while the function hand
points “
RX
” cancels signal reception and the watch returns to normal indication.
About signal reception
Types of signal reception
There are three ways to receive the time signal.
Type Use
Automatic reception The watch receives time signals once a day automatically.
Manual reception (On
demand reception)
You can perform signal reception manually when
required.
Recovery automatic
reception
The watch automatically receives time signals when it
is charged enough after it stopped due to insufficient
charge.
• Even when this watch receives the signal successfully, the accuracy of the displayed
time will be dependent on the reception environment and internal processing.
• This watch keeps ±15-second monthly accuracy even if no time signal is received.
When receiving the time signal
Take off the watch with pushing the crown in to position
0
and place it on a stable
surface where it can receive the signal better, such as next to a window.
• When wire glass is used for the window, open it or
change the reception place.
• The reception antenna is located at the 9:00 position
of the watch. Place the watch with the 9:00 position
facing toward the station.
• Do not move the watch during time signal reception.
• When the second hand is moving once every two
seconds (during insufficient charge warning), time
signal reception is not executed. Charge the watch
before trying reception.
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