A chronograph is a watch that is also a stopwatch. The big red hand sweeps seconds; small sub-dials count the larger units. On this face the dial at 9 o'clock turns once a second to show tenths, the one at 3 o'clock counts up to thirty minutes, and the one at 6 o'clock counts hours.
As a clock it works the other way round: the three hands tell the time and the sub-dials show the small seconds, the day of the month and the day of the week. Press Start on the stopwatch and the dial changes into a timing instrument.
Where it's useful
- Timing laps, with the sweep hand and sub-dials showing the whole picture
- A good-looking stopwatch for a presentation or video
- Learning how a mechanical chronograph is read
- A clock that also shows the date and weekday
Three ways to use it
- Clock — the time of day in your time zone or any city, in 12- or 24-hour form.
- Stopwatch — counts up with laps; press Lap while it runs.
- Countdown — counts down from any time you set, sounds at zero, then counts overtime.
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Questions
What do the three small dials do?
In stopwatch and countdown modes: the left shows tenths of a second, the right counts minutes up to 30, and the bottom counts hours. In clock mode they show seconds, the date and the weekday.
How do I read a chronograph?
Read the red sweep hand against the outer scale for seconds, then add the minutes from the right sub-dial and the hours from the bottom one.
Is it accurate enough for timing?
It uses the same precise timer as the main stopwatch, so the hand position is exact to the screen's refresh. For hand-timed events, tenths of a second is the honest limit.