21
20
II. M
EASURING AN INTERRUPTED SHORT TIME
1. Press pushpiece
A
to start the chronograph. Hand
3
allows you to follow the measurement in seconds.
2. To interrupt the measurement, press pushpiece
A
once more. To restart the time measurement, press
pushpiece
A
. This procedure makes it possible to
add several short times.
3. The chronograph is reset to zero by pressing push-
piece
B
, once the final measurement has been stopped.
B
A
MPH
A
MPH
SPECIAL CHARACTERISTICS
USING THE TACHOMETER
The tachometer is the graduation on the dial or flange of your B
REITLING
chronograph enabling you to determine average speeds or hourly produc-
tivity rate, based on an observation period of less than 60 seconds.
1. Average or mean speed
Using the chronograph to measure the time required to cover a kilometre or
a mile. If it takes 20 seconds to cover 1 km or 1 mile, the scale respectively
indicates an average speed of 180 km/h or 180 miles/h.
2. Hourly productivity rate
Measuring the time required to produce 1 unit. If the chronograph is stopped
at 40 seconds, the tachometric scale indicates 90, corresponding to an hourly
productivity rate of 90 units.
Summary of Contents for Montbrillant Datora
Page 1: ...MONTBRILLANT DATORA...
