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➅ ➅ ➅ ➅ ➅
F
S
OFF
➆ ➆ ➆ ➆ ➆
CAL
➇ ➇ ➇ ➇ ➇
➈ ➈ ➈ ➈ ➈
➉ ➉ ➉ ➉ ➉
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4.1
Procedure
1. Selection of measurement range
The sound level meter features 3 measurement ranges each having a
dynamic range of 55 dB:
Low noise range level:
Medium noise range level:
High noise range level:
When noise measurement is active, the measurement is repeated more
than 2 times per second.
If the
or
that the measurement range you are in is too high or too low. In this case,
press the RANGE button until you return to the adequate measurement
range.
2. Choice of frequency weighting
Since the ear does not have the same hearing sensitivity for all frequencies,
filters are used which weight or correct the measurement levels according
to frequency.
Two correction curves A and C are on the CA832. To switch from one to
the other a long press is needed ( > 2 seconds ) on the push button
The most common is weighting curve A corresponding to the "average
international ear". It is usually used for the measurement of nuisance
levels in industrial areas.
Curve C is more suited for verification of the presence of low frequency
noise (if the measurement level on position C is higher than on position A
, this means that the signal contains significant low frequency components).
This curve is well suited for the measurement of musical environments.
3-position centre switch :
OFF
Unit OFF.
S
Long response time measurement (use for
fluctuating noise level measurements).
F
Fast response time measurement (most
common operating mode).
Protective cap for the tester calibration screw.
Screwdriver to be used for calibration of the sound
level meter.
'Jack' connector for recording using an external system.
Assembly screw for photo tripod.
Femal type output for use with 'Jack' connector.
4. UTILISATION
arrows are shown continuously on the display, this means
35 to 80 dB
50 to 100 dB
80 to 130 dB
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