BRUEL & KJAER 2226 User Manual

Instruction Manual
Integrating Sound Level Meter Type 2225
Integrating Impulse Sound Level Meter Type 2226
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Briiel•l( j ar ~ Type 22211
033-0523
Two portable Sound Level Meters with easy-
to-read
"thermometer" display, complying
with IEC 651 Type 2*, DIN 45634 and
ANSI S1 .4 - 1971 Type S2A. An A-weight-
ing network is built-in. "Fast" and "Slow"
time constants and a one minute L eq easily
converted to SEL (LAx) on both meters. In
addition the 2225 has a "Peak" hold and
the 2226 an "Impulse" function and "Max.
hold" facility on all time constants. The
measuring range from 25 dB(A) to
1 40 dB(A) peak is covered in 4 overlapping
40 dB(A) ranges. Automatic reset and other
features enable operators to make accurate
valid measurements after a short period of
familiarisation. DC output to a level recor-
der.
Supplied with Prepolarised Condenser Mic-
rophone Type 4175
• except for "Max . hold" on 2225
+ BrUel & Kjaer

BRUEL & KJAER 2226 Specifications

General

Frequency Range	20 Hz - 20 kHz
Standards	ANSI S1.4
Weighting	A, C
Time Weighting	Fast, Slow, Impulse
Power Supply	Batteries or External DC
Detector	RMS

Summary

Introduction and Initial Setup

CALIBRATION

Procedure for calibrating the instrument using a sound level calibrator.

Technical Specifications

Measuring Range

Defines the operational measurement limits of the device.

Detector Characteristics

Details the types of detectors used for measurements.

DC Output

Describes the characteristics of the DC output signal.

Microphone Specifications

Instrument Controls Overview

MICROPHONE

FUNCTION SELECTOR

Selects the measurement mode (Fast, Slow, Leq, Peak, Impulse).

RANGE SELECTOR

Chooses the appropriate measurement range.

DC OUTPUT Socket

Operation and Measurement Procedures

3.4. CALIBRATION

Procedure for calibrating the meter with a sound level calibrator.

3.5.2. Procedure for Sound Level Measurements

Step-by-step guide for performing sound level measurements.

3.5.3. Noise Dose Measurements

Method for measuring noise dose over a specified period.

3.5.4. SEL(LAX) Measurements

Procedure for measuring Sound Exposure Level (SEL).