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e.g.:the attenuation selection switch is set at the "80" positi-
on and the pointer indicates "+2" in the analogue dis-
play; from this it follows that the sound source intensity
is 82 dB.
To achieve an exact measurement value, always use the lowest
possible attenuation.
e.g.:the attenuation selection switch is set to the "80" positi-
on and the analogue display shows approx. "-6". Now
change the attenuation range to "70"; the more exact
value "+3" is indicated in the analogue display, from
which a value of 73dB results.
For positive measurements, the sound source to be measured
should be 10dB louder than the background noise.
The Sound Level Meter is just a tool and is suitable for neither
laboratory use nor scientific applications.
7.4 Prevention of measurement errors
If the noise of a sound source comes principally from one direc-
tion, the indication of the Sound Level Meters can be rendered
false due to reflections by the human body. Do not hold the
Sound Level Meter directly between the body and the sound
source, because otherwise measurement errors can result at fre-
quencies above approx. 100 Hz.
Sound wave
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All manuals and user guides at all-guides.com
Directional characteristics of the built-in microphone:
90°
7.5 Cinch output socket
A recorder or analyser can be connected to the Cinch output
socket for further assessment. The output signal at this socket is
330 mV rms at 0 dB meter indication.
7.6 Tripod adapter
By means of the tripod adapter (8) provided on the rear, the
Sound Level Meter can be mounted on any commercially avail-
0°
0 dB
10 dB
20 dB
1 KHz
270°
15 KHz
8 KHz
180°
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