BRUEL & KJAER 2222 User Manual

Instruction Manual
Precision Integrating Sound Level Meters
Types
2221 and 2222
1-0330601-1A
BE 0601
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Pocket-sized Preco:lslon Integrating Sound
Level
Meters complying with Proposed IEC
standard for Precision Integrating Sound
Level
Meters Type 1 P, and relevant sections
of IEC 651 type 1, DIN-IEC 651 Klasse 1,
ANSI S1.4.1971 type 1, and BS 5969 Type 1.
It measures Leq over periods up to 2, 77
hours, SEL and Max. Hold "Fast/Slow" and
"Peak". The measuring range
from 25 to
145 dB Is covered In four overlapping sub-
ranges and the
results are directly shown on
a
digital display with 0,1 dB resolution. An
AC output Is provided for recording pur-
poses. It Is supplied with Prepolarlzed Con-
c;:tenser Microphone Type 4176.
Types
2221 and 2222 are Identical except
that the Type 2221 has a "Fast" time weight-
ing,
whilst the Type 2222 has a "Slow" time
weighting.
+ Briiel & Kjaer

BRUEL & KJAER 2222 Specifications

General

Brand	BRUEL & KJAER
Model	2222
Category	Measuring Instruments
Language	English

Summary

Introduction to Sound Level Meters

Leq Measurements

Explains A-weighted noise level averaged over a measurement period.

SEL Measurements

Defines Sound Exposure Level (SEL) and its measurement process.

Instrument Description and Operation

Operational Principle and Components

Details instrument principle, microphone, input stage, and weighting networks.

Calibration and Specifications

Calibration Procedure

Explains the procedure for calibrating the instrument using a sound level calibrator.

Controls Overview

Function and Mode Selection

Covers Function, Leq Range, and Mode selectors for operation.

Operation Procedures

Battery Installation

Measurement Operations

Calibration

Describes the acoustical calibration process using Sound Level Calibrator Type 4230.

Sound Level Measurement: General

Provides general guidance before starting sound level measurements.

Measurement Considerations

Considerations Regarding the Type of Sound Field

Discusses the use of the Random Incidence Adaptor for different sound field conditions.

Specific Measurement Functions

Leq and SEL Measurements

Explains how to perform Leq and SEL measurements and interpret results.

Max Hold "Fast" or "Slow" Measurements

Max. Hold "Peak" Measurements

Advanced Measurement and Examples

Noise Dose Evaluation