Presentation; Precautions For Use - Chauvin Arnoux CA834 Manual De Instrucciones

The C.A 834 sonometer-recorder is designed to evaluate sound nuisances according to
safety requirements and current legislation.
It conforms to standards IEC 651 type 2 and ANSI S1.4 type 2 for sonometers.
It is capable of a multitude of professional and domestic applications : the measurement of
sound levels in factories, schools, offices, airports, studios, auditoriums, etc...
The C.A 834 is a compact portable unit suitable for holding in one hand and for mounting on
a tripod such as those used by photographers, for long term measurements.
It is capable of measuring sound levels from 30-130dB and recording them (memory capacity
of 32000 values). It has an USB interface for two-way communication with a PC.
It comes with two frequency weighting A and C, allowing for the sensitivity of the human ear
as a function of the sound frequency. Frequency weighting A is generally used in the industrial
environment and C is better suited to audio frequency sound.

2. PRECAUTIONS FOR USE

2.1 Precaution for use of the sensor
Please read these instructions carefully before using the equipment.
- The sonometer is a measurement instrument whitch must be protected
from severe shock and vibration.
- In particular, protect the microphone from exposure to water and dust and
do not store it in damp and/or excessively hot places
- It is not advisable to clean the microphone.
2.2 Remark concerning measurement conditions.
1. If the difference in levels between the presence and absence of sound to be measured is
10dB or more, the influence of the background noise on the measurement can be considered
as negligible.
If the difference is smaller than this level, compensation corrections (see the table below)
will need to be applied to the measurement made to allow for the background noise :
Level difference
(dB)
Compensation
value (dB)

1. PRESENTATION

4 5 6
-2.2 -1.7 -1.3
14
7 8 9
-1 -0.8 -0.7
10
0