Seiko KINETIC 7L22A Parts Catalogue /Technical Manual page 24

To measure the hourly rate of operation
U s e t h e s t o p w a t c h t o
1
measure the time required to
complete 1 job.
2 Tachymeter scale indicated
by STOPWATCH second
hand gives the average
number of jobs accomplished
per hour.
Ex. 2: If 15 jobs are completed in 20 seconds:
"180" (tachymeter scale figure) x 15 jobs = 2700 jobs/hour
12
Ex. 1
"180" (tachymeter scale figure) x 1 job
= 180 jobs/hour
STOPWATCH
second hand:
20 seconds
Tachymeter scale: "180"