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English
English
To measure the hourly rate of operation
Use the stopwatch to measure
the time required to complete 1
job.
1
Tachymeter scale indicated
by STOPWATCH second hand
gives the average number of
jobs accomplished per hour.
2
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
TELEMETER
(for models with telemeter scale on the dial)
l The telemeter can provide a rough indication of the distance to the source of
light and sound.
l The telemeter indicates the distance from your location to an object that emits
both light and sound. For example, it can indicate the distance to the place
where lightning struck by measuring the time elapsed after you see a flash of
lightning until you hear the sound.
l A flash of lightning reaches you almost immediately while the sound travels to
you at a speed of 0.33 km/second. The distance to the source of the light and
sound can be calculated on the basis of this difference.
l The telemeter scale is graduated so that the sound travels at a speed of 1 km in
3 seconds.*
*Under the condition of temperature of 20° C (68° F)
CAUTION
The telemeter provides only a rough indication of the distance to the place
where lightning struck, and therefore, the indication cannot be used as the
guideline to avoid the danger of lightning. It should also be noted that the
speed of the sound differs depending on the temperature of the atmosphere
where it travels.
7


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