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Sound Level Meters – User Manual
4.7
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 instrument 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 and at 30 minutes past. When the measurement ends,
a new one will begin and last for the next 30-minute interval.
If the instrument is paused when an automatic timer begins, the new timed measurement will
also be paused.
The single timer allows measurements to automatically stop after a pre-defined period. If you
set the single timer duration to 15 minutes and enable the single timer option, then all
measurements will automatically stop after 15 minutes.
(Firmware version 2.8 and above)
The single timer can also be set using the NoiseTools software
to halt when the measurement is paused. This allows a measurement to have an exact ‘non-
paused’ duration. For example, if you set the single timer to two minutes and pause the
measurement for 30 seconds, the measurement will automatically stop after two minutes and
30 seconds instead of after two minutes.
4.8
Back erase/pause
4.8.1 Pause
Your sound level meter provides pause and back-erase functions, 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.
Please note that the measurement will automatically resume after five minutes in pause mode.
4.8.2 Back-erase
The back-erase function allows a section of the measurement to be removed from the data used,
to calculate the overall values.
Summary of Contents for Optimus+
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