
English
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Ex. 1
To measure the hourly rate of operation
1
Use the stopwatch to measure the
time required to complete 1 job.
2
Locate the second marker on
the main dial that corresponds
to the measured seconds, and
the tachymeter scale it indicates
gives the average number of
jobs accomplished per hour.
s
“180” (tachymeter scale figure) x
1 job = 180 jobs/hour
CHRONOGRAPH
second hand:
20 seconds
Tachymeter
scale : “180”
Ex. 2: If 15 jobs are completed in 20 seconds:
“180” (tachymeter scale figure) x 15 jobs = 2700 jobs/hour
on tachymeter scale:
“90” (tachymeter scale figure) x 2 (km or mile) = 180 km/h or mph
“90” (tachymeter scale figure) x 0.5 (km or mile) = 45 km/h or mph