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BRUEL & KJAER 2240 User Manual

BRUEL & KJAER 2240
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Technical
Documentation
Integrating-averaging
Sound Level Meter Type 2240
Instruction Manual
HEADQUARTERS: DK-2850 Nærum · Denmark · Telephone: +45 4580 0500 · Fax: +45 4580 1405 · www.bksv.com · info@bksv.com
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English BE 1694 12
Cover_BE169412.fm Page 1 Wednesday, March 7, 2007 1:06 PM

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BRUEL & KJAER 2240 Specifications

General IconGeneral
Weighting NetworksA, C
Time WeightingFast, Slow
DisplayLCD
Battery LifeApproximately 20 hours
Storage Temperature-20 to 60°C

Summary

Safety Considerations

Safety Symbols

Identifies warning symbols and their importance for safe operation.

Explosion Hazard

Notes that the equipment is not designed for potentially explosive environments.

General Warnings

Provides crucial warnings regarding power, maintenance, and adjustments.

Chapter 1 Introduction

About This Manual

Explains the purpose of the instruction manual and its relation to the user guide.

Topics Covered in User Guide

Lists documentation requirements covered in the User Guide and non-applicable topics for Type 2240.

Chapter 2 Hardware Setup

Measuring at Low Static Pressure

Discusses the influence of static pressure on microphone frequency response.

Frequency Weightings

Details A and C frequency weightings conforming to IEC standards.

Measured Quantities

Provides formal definitions for measured quantities like Overload, Under-Range, Lxy(t), etc.

Chapter 3 Conformance Testing

Introduction

Outlines information needed for conformance testing according to specified standards.

Selecting C-weighting

Explains how to switch between A-weighting and C-weighting for measurements.

Mounting for Acoustical Tests

Covers mounting for acoustical tests to minimize reflections and ensure accuracy.

Mounting for Mechanical Vibrations Tests

Describes mounting the Type 2240 on a shaker for vibration tests.

Electrical Substitute for Microphones

Details replacing the microphone with a WA-0302-A adaptor for electrical input.

EMC Test Procedures

Outlines procedures for EMC immunity and emission testing.

Chapter 4 Specifications

Specifications

Details general specifications and compliance under reference environmental conditions.

Standards

Lists international and European standards to which Type 2240 conforms.

Reference Environmental Conditions

Specifies the temperature, pressure, and humidity for reference conditions.

Reference Conditions for Acoustic Calibration

Defines reference range, SPL, and frequency for acoustic calibration.

Microphone

Provides specifications for the Type 4188 microphone used with the instrument.

Frequency Response

Covers free-field frequency responses and deviation from ideal curves.

Diffuse-field Frequency Responses

Details diffuse-field frequency responses and body influence.

Directional Response

Gives directional responses for plane, progressive, sinusoidal sound waves.

Self-generated Noise

Specifies maximum and typical broadband self-generated noise levels.

Measuring Range

Defines maximum sound level and total measuring range.

Primary Indicator Range

Specifies primary indicator ranges according to international standards.

Indicator Range

Specifies indicator ranges according to international standards.

Linearity Range

Defines linearity range according to international standards.

Pulse Range

Defines pulse range according to international standards.

Linear Operating Range

Specifies linear operating ranges at different frequencies.

Peak C Range

Defines peak C range according to international standards.

Detectors

Details exponential averaging, linear averaging, and peak detector characteristics.

Influence from the Operating Environment

Covers stabilization time, temperature, humidity, vibration, and magnetic fields.

Electrical Input to Type 2240

Specifies the safety limit for electrical input to the instrument.

Electrical Output from Type 2240

Details AC output voltage, impedance, and load impedance.

Power Supply

Specifies input voltage range and battery type for the instrument.

Warm-up Time

Indicates the time required for the instrument to stabilize after power-on.

CE-mark and C-Tick mark Compliance

Explains the meaning of CE and C-Tick marks and related standards.

Appendix A Tables

Electrical Frequency Responses

Tabulated electrical frequency response data for A and C weightings.

Free-field Frequency Response Data

Tabulated free-field 0° frequency response for Sound Level Meter Type 2240.

Diffuse-field Frequency Response Data

Tabulated diffuse-field frequency response for Type 2240 with corrector.

Appendix B Indexes

Indexes Overview

Introduces cross-indexes between standards and manual sections.

Standard Cross-indexes

Maps standard paragraphs to corresponding manual sections for IEC 60651, 60804, 61672-1.

Irrelevant Topics

Lists topics not provided or irrelevant for the product, with references.

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