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5
Operation
5.1
Measurement
To take a measurement, turn on the device by pressing the "On/Off" key. Once the device gets
to the main screen, it measures the sound level continuously.
To select one of the available measuring ranges, press the "LEVEL" key. You can choose
between the following options: Lo (30 ... 80 dB), Med (50 ... 100 dB), Hi (80 ...130 dB), Auto
(automatic measuring range selection).
Make your choice depending on the ambient sound level. If the ambient sound level falls below
the selected measuring range, the display shows "UNDER". If the ambient sound level exceeds
the selected measuring range, the display shows "OVER".
To change the frequency weighing of the sound level measurements, press the "A/C" key. You
can switch between A-weighing and C-weighing.
To change the sampling rate, press the "FAST/SLOW" key. You can switch between "FAST" (1
measurement / 125 ms) and "SLOW" (1 measurement / 1 s).
5.2
Further functions
5.2.1
MIN/MAX hold function
You can freeze the maximum and minimum values on the display. To do so, press the
"MAX/MIN" key. Now, a "MAX" indication appears on the display, which means that the
maximum value (since the activation of the function) is shown on the display.
Press the "MAX/MIN" key again to activate the MIN hold mode. Now, the display shows a "MIN"
indication and the minimum value (since activation of the function) is shown on the display.
Press the "MAX/MIN" key again to deactivate the function and to return to normal measuring
mode.
5.2.2
Hold function
You can freeze the current reading on the display at any time by pressing the "HOLD" key. To
unfreeze it, press the "HOLD" key again.
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