BRUEL & KJAER 2230 User Manual

Instruction Manual
Precision Integrating Sound Level Meter Type 2230
-
-·-
..__
... .. _
-
+
.....
....
·-
·-
. ....
,:; + ••o~
1tt" •ltJO;I
100 11101
- •11t01
10 . •!100 j
10 · •tiiO I
.. ..
An Integrating Sound Level Meter with
Type 1
Impulse precision. Its comprehen-
sive construction and versatility make it
ideal for all kinds of sound level measure-
ments including octave and 113 octave fre-
quency analysis using a snap-on filter set.
The Type
2230 carries out five measure-
ments in parallel: SPL, Max., Min., Leq and
SEL,
all of which can be obtained for the
same
signal. A choice between 2 detector
modes (RMS and Peak), 3 time weightings
(Slow, Fast, Impulse), 4 frequency weigh-
tings (A, C, Lin and All-pass) is available
for the measurements.
A
partial (Max./Min.) reset, a total reset
and a pause
function increase the use-
fulness of the instrument. A linear free or a
linear diffuse field frequency response is
obtained by electronic frequency weighting.
The SPL is
continuously monitored on a
quasi-analogue 60 dB scale. Warnings of
overload, depleted batteries and illegal set-
tings are also given. AC and DC outputs
allow chart or tape recording and audio
monitoring of the SPL.
+ Bri.iel & Kjaer

BRUEL & KJAER 2230 Specifications

General

Frequency Range	10 Hz to 20 kHz
Weighting	A, C, Linear
Time Constant	Fast, Slow, Impulse
Detector	RMS
Operating Temperature	-10°C to +50°C
Output Impedance	100 Ω
Type	Sound Level Meter
Microphone	1/2" Condenser Microphone
Power Supply	Batteries or external DC
Battery Life	Approx. 8 hours
Dynamic Range	100 dB

Summary

CONTROLS

ALL-MAX./MIN.-PAUSE Control

Manages reset functions for Max/Min detectors or pauses measurements.

Frequency Weighting Selection

Selects A, C, Lin, or All-pass frequency weighting.

External Filter Connection

Manages the use of external octave or 1/3 octave filter sets.

Sound Incidence Adjustment

Sets microphone response for free or diffuse field conditions.

Display Mode Selection

Chooses which measurement (SPL, Max, Min, Leq, SEL) is digitally displayed.

Time Weighting Settings

Sets Impulse, Fast, or Slow time weighting characteristics.

Detector Mode Selection

Selects Peak or RMS detector for measurements.

Sensitivity Adjustment Potentiometer

Calibrates the instrument's sensitivity.

Output Connections (AC/DC)

Describes AC and DC output sockets for recording.

OPERATION

Operation Introduction

Overview of using the Sound Level Meter and general measurement practices.

Battery Installation and Management

Guide for installing and replacing the instrument's batteries.

Microphone and Accessory Mounting

Instructions for attaching the microphone and accessories.

CALIBRATION

Internal Reference Oscillator Calibration

Electrical calibration using the instrument's built-in reference signal.

Sound Level Calibrator Type 4230 Calibration

Acoustic calibration using an external sound calibrator.

Pistonphone Type 4220 Calibration

Acoustic calibration using a Pistonphone.

Input Attenuator ZF 0020 Calibration

Calibration considerations when using the input attenuator.

SOUND LEVEL MEASUREMENT

General Measurement Procedures

Best practices before and during sound level measurements.

Sound Field Type Considerations

Guidance on selecting sound incidence for different field types.

Measurement Types Overview

Overview of SPL, Min, Max, Leq, and SEL measurements.

Sound Pressure Level (SPL) Measurement

Procedure for measuring Sound Pressure Level.

Sound Exposure Level (SEL) Measurement

Procedure for measuring Sound Exposure Level.

Equivalent Continuous Sound Level (Leq) Measurement

Procedure for measuring Leq.

Max/Min Hold Measurements

Procedure for capturing maximum or minimum levels.

Elapsed Time Determination

Method to calculate measurement duration from Leq and SEL.

Noise Dose Evaluation Method

Method for evaluating noise dose percentage.

USE WITH OTHER INSTRUMENTS

Level Recorder Type 2317 Usage

Connecting and using the Level Recorder for data acquisition.

Tape Recorder Type 7005/06 Usage

Connecting and using tape recorders for sound level measurements.

Frequency Filters Usage

Connecting and using octave and 1/3 octave filter sets.

APPENDIX

SERVICE AND REPAIR