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2. Parasitic reflections
The microphone must be positioned far from any sound reflective surfaces
such as walls or the ground, so as to minimise errors due to possible
parasitic reflections.
When taking measurements, hold the sound level meter at arm's length,
to avoid any reflections due to your own body and also to enable free
propagation of sound in all directions.
3. T
ake the necessary steps so that no obstacle is between the
measurement point and the noise source.
D
4.
isregard the extremely low readings (insignificant sound) or conversely
those at the top of the scale (overload).
3. DESCRIPTION OF THE INSTRUMENT
➀ ➀ ➀ ➀ ➀
Measuring head including the microphone, protected by a foam cap.
➁ ➁ ➁ ➁ ➁
Backlit liquid crystal digital display.
- Main display : digital value of sound level expressed in dB over
3 ½ digits or OL error code (overload).
- Display symbols :
MAX
F
S
A
C
35-80dB, 50-100dB, 80-130dB
OL
➂ ➂ ➂ ➂ ➂
➃ ➃ ➃ ➃ ➃
RANGE
➄ ➄ ➄ ➄ ➄
MAX
maximum value of the measurement
Battery discharged
fast time compensation
slow time compensation
weighting curve type A
weighting curve type C
If one of these 2 arrows is displayed continuously, this
means that you are not in the appropriate measurement
range : use the RANGE push button to move to the
adequate range.
indicates overload of the measuring instrument.
2-function push button :
Short press : Backlight ON/OFF.
Long press (>2 seconds) : choice of frequency weighting
A or C.
push button for measurerement range change.
push button for activation/deactivation of MAX function.
measurement range in use.
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