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VOLTCRAFT SL-451 - HOLD function; MAX.;MIN. function; Frequency weighting A;C line; Switching the measuring range

VOLTCRAFT SL-451
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

The measured value currently being displayed is held in the display. The active function is shown in
the display by “HOLD”.
Press the “HOLD” button to activate this function.
Press again to switch back to the continuous measuring mode

With continuous measuring, the display only shows the maximum or minimum value. This measu-
rement function makes it easier for you to determine the peak level. The active function is shown in
the display by “MAX” or “MIN”.
Press the button “MAX/MIN” to activate this function. Each additional press of the button switches to
the next display mode. MAX, MIN, normal measuring mode, MAX, MIN...

The frequency of the measuring signal is weighted with the help of two benchmark curves.
Line A represents the characteristic hearing line of the human ear. Humans perceive deep sounds
as quieter than mid or treble sounds. Line C weighs the frequency spectrum linear and without lter
(actual sound level).
Press the button “A/C” to switch this lter. The active lter is shown as “dBA” or dBC” on the display.

The sound level meter has four measuring ranges. The bottom range is from 30 to 80 dB, the
medium range from 50 to 100 dB, and the top range from 80 to 130 dB. The automatic range is from
30 to 130 dB.If one of these ranges is exceeded or undercut, “UNDER” or “OVER” appears on the
display.
Switch to the next higher/lower measuring range. To switch, press the button “LEVEL”.

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