Casella CEL CEL-272 - Manual

CEL-272 PERSONAL SOUND EXPOSURE METER
Instructions
Reduce the Artwork to 95%
PP60111
Issue: 2
September 1990
The CEL-272 Personal Sound Exposure Meter is
a totally new instrument designed to fulfill the
measurement requirements of the United Kingdom
"Noise at Work Regulations" 1989, and the re-
cently introduced ISO 1999: 1990 "Determination
of Occupational Noise Exposure and Estimation of
Noise Induced Hearing Impairment" which stipu-
late standard methods for measuring personal
sound exposure.
The CEL-272 complies with Draft IEC Document
TC 29/WG 4, and substantially meets the require-
ments of BS 6402 for Personal Noise Dose Me-
ters. Where relevant, the performance of the
instrument also satisfies IEC 804 for integrating av-
eraging sound level meters.
Recent European noise exposure legislation men-
tions three action levels. At levels below the 1st ac-
tion level (1.0 Pa
2
h - equivalent to 85 dB(A) for 8
hours) "reasonably practicable" noise reductions
should be made. Between the 1st and 2nd action
level (3.2 Pa
2
h - 90 dB(A) for 8 hours) noise as-
sessments must be made, records kept, details
given to employees, and hearing protection issued
to those who ask for it. Above the 2nd and also at
or above the peak action level (200 Pa - 140 dB
for any period), hearing protection measures must
be enforced by the employer.
The Personal Sound Exposure Meter is a mini-
ature instrument intended to be worn by an individ-
ual so that its microphone is subjected to as nearly
as possible the same sound exposure as the
wearer. It can be switched to give a reading in
either Pa
2
h sound
exposure or % noise
dose (see box).
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