Norqain ETA 2824 User Manual, International Warranty page 20

T A C H Y M E T E R
Hourly performance
Start the time measurement
by activating the chronograph
20 sec.
function (pusher A). After
completing your unit, end the
time measurement (pusher A).
If your required time for a unit
is 20 seconds, the tachymeter
will show 180, meaning that in
one hour you can complete 180
units.
180 x 1/h = 180 units
Set the seconds back to 0
(pusher B) before starting further
time measurements.
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