optimus sound level meter user manual
Page 21
Timers
The single and repeat timers allow you to make precisely timed measurements over
pre-set or custom defined durations, which are set on the instrument using the
Storage Options Menu (see next chapter).
The repeat timer allows measurements to be stopped and started automatically over a
long period of time. The
optimus
can still be stopped and started manually when the
repeat timer is active.
The repeat timer is synchronised to the real time clock, so if you choose a 30 minute
duration the measurement will begin on the hour or at 30 minutes past. When the
measurement ends, a new one will begin and last for the next 30 minute interval.
If the
optimus
is paused when an automatic timer begins, the new timed
measurement will also be paused.
Please note, after 5 minutes in pause the
optimus
will restart.
Back Erase/Pause
Pause
The
optimus
sound level meters provide Pause and Back Erase function which can be
used during a measurement.
When the Pause function is enabled in the menu, the Stop button is replaced by the
Pause/Stop button. This also enables the Back Erase function, the duration of which
can be set in the menu.
Back Erase
The Back Erase function allows a section of the measurement to be removed from the
data used to calculate the overall values.
An example of this would be if, during the measurement of cars on a road, a large
truck passed by the measurement location. If the intention was only to measure cars,
the truck can be excluded from the overall measurement data by pressing the Pause
button and then using the Back Erase to remove a preset section of noise.
The time that the pause button was pressed, along with the Back Erase duration, will
be excluded from the calculation of the overall noise values such as the Leq, Lmin,
Lmax, LPeak, and the 1:1 and 1:3 Octave Band overall values.
