Junghans Worldtimer Chronograph, User Manual

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39 38
Contents Page
1. Radio-controlled technology – state-of -the-art time measurement
39
1.1 Usable time signal transmitters 40
2. Automatic time synchronisation 42
3. Functions 43
3.1 Base mode 44
3.2 Additional functions 45
4. Description of functions and their operating 47
4.1 Display date / seconds
47
4.1.1 Setting time zone
1
st time
46
4.2 Date / calendar week
48
4.2.1 Language selection (day of the week display)
49
4.3
2
nd time
50
4.4 Reception indicator
51
4.4.1 Manual synchronisation (transmitter call)
52
4.4.2 RC on/off
53
4.4.3 Adjusting the contrast of digital display
55
4.5 Chrono with LAP and SPLIT function
56
4.6 10 hour countdown timer
58
4.7 Alarm
60
5. Restart / starting up procedure
62
5.1 Manual start
63
5.1.1 Manual setting of time 63
5.1.2 Manual setting of date 65
6. Readiness for use 66
7. General information 67
8. Technical information 69
1. Radio-controlled technology – state-of -the-art time measurementz
5,000 years have passed since timekeeping began, first with sun dials,
followed by water clocks, the mechanical clocks of the 13th century, quartz
watches and now culminating in radio-controlled watches.
With good reception the watch never goes wrong or needs to be set. The
Junghans radio-controlled watch is absolutely precise, as it is linked by radio
frequency to the time control system of the most accurate clocks in the
world.
For Europe this is the Caesium Time Base at the Physikalisch-Technische
Bundesanstalt in Braunschweig (PTB, National Metrology Institute).
For North America it is the U.S. Commerce Department's Caesium Time Base
at the National Institute of Standards and Technology (NIST) in Boulder,
Colorado.
For Japan it is the National Institute of Information and Communications
Technology (NICT) at the Ministry of Internal Affairs and Communications in
Tokyo.
All these clocks are so accurate, that they are expected to deviate by no more
than 1 second in a million years.