B&K 2250 Light, Руководство пользователя

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APPENDIX E
Glossary
181
Occupational Health
Standards: Typical Setup Parameter settings for Occupational Health measurements in
accordance with various standards:
• OSHA (Occupational Safety and Health Administration) – 29 CFR 1910.95
• MSHA (Mine Safety and Health Administration) – 30 CFR 62.0 UMHRPEL
• DOD (Department of Defence) – DoD Instruction 6055.12
• ACGIH (American Conference of Government Industrial Hygienists) –
DHHS Pub 98-126
• ISO – UK Noise at Work Regulations SI 1989/1790 amended by
SI 1992/2966 and SI 1996/341
See the table below, but please also check your local legislation.
Table E.1
Occupational Health Setup Parameters and Associated Standards
Setup Parameters OSHA MSHA DOD ACGIH ISO
Broadband (excl. Peak) A A A A A
Broadband Peak Z Z Z Z C
Exposure Time N/A N/A N/A 8:00:00 8:00:00
Reference Time (Preset) 8:00:00 8:00:00 8:00:00 8:00:00 8:00:00
Reference Time (user-definable) 40:00:00 40:00:00 40:00:00 40:00:00 40:00:00
Threshold Level 80 80 80 80 70
Criterion Level 90 90 85 85 85, 90
PeaksOver Level
a
140 140 140 140 140
Exchange Rate for Lav 5 5 4 N/A N/A
Weighting for Lav S S S N/A N/A
a. This is user-definable – the two other ‘PeaksOver Level’ parameters are preset to 137 and 135 dB resp.
Reference Time: Reference Time is used for calculation of Sound Exposure Level L
ep,d,v
or
Time Weighed Average TWA
v
with a reference time other than 8 hours.
RC, RC Classification,
Rumble, Hiss, RV: Room Criteria is for rating room noise.
The rating is determined based on the PSIL value and gets the Classification
(R) for Rumble, if the spectrum is rich in low frequency sound (16 Hz to
500 Hz), the Classification (H) for Hiss, if the spectrum is rich in high
frequency sound (1 kHz to 4 kHz), the Classification (N) for Neutral if it is
not (R) or (H), or the Classification (RV) for Vibration and Rattle if the
spectrum at low frequencies (16 Hz to 63 Hz) is likely to produce audible
rattling in lightweight building elements.
The rating is defined in ANSI S12.2-1995