5 Using the product
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2. Press the or key to set a value, press the key to
change to the next value.
> Press the key to cancel the process.
5.4. Showing / hiding the date / time
> Press the key.
5.5. Switching the display illumination on / off
Switching on / off manually
> Press the key.
Automatic switch-off
The display illumination is switched off automatically after 30 s.
5.6. Changing the frequency weighting
Frequency weighting A is used for standard sound level
measurements. This weighting corresponds to the
perception of sound by the human ear. “Aurally
compensated” volume is referred to in this context.
If the low-frequency portions of a sound are also to be
weighted, frequency weighting C is used. If the displayed
C-weighting value is considerably higher than the A-
weighting value, then there is a large amount of low-
frequency noise.
> Press the key.
5.7. Changing the time weighting
The ranges “Slow”, with a time weighting of 1s, and “Fast”,
with a time weighting of 125ms, are available. The incoming
sound signals are incorporated over a period of 1 s or 125 ms
accordingly. If “Fast” is set, the rate at which readings are
shown in the display increases from one reading per second to
around 5 - 6 readings per second. The “Slow” time weighting
should be selected for noises whose signals only change in
volume gradually, such as machines, photocopiers, printers
etc. Select the “Fast” mode to measure sudden changes in
sound level (e.g. building machinery).
> Press the key.
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General
Weight and Dimensions
