To measure the hourly rate of operation
English
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Use the stopwatch to measure the time required to complete 1 job.
Tachymeter scale indicated by STOPWATCH second hand gives the average number of jobs ac- complished per hour.
Ex. 1
STOPWATCH second hand: 20 seconds
Tachymeter scale: “180”
“180” (tachymeter scale figure) x 1 job = 180 jobs/hour
Ex. 2: If 15 jobs are completed in 20 seconds:
“180” (tachymeter scale figure) x 15 jobs = 2700 jobs/hour
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