Geräte Informationen

Brüel & Kjær 2238 Level Meter
Hersteller:
Brüel & Kjær
Modell: 2238
Datum:
Kategorie: Messgeräte
Gruppe: Level Meter
Beschreibung: Integrating Sound Level Meter
Informationen:
                                     About the 2238 Mediator
Standards
2238 Mediator Integrating Sound Level Meter complies with
the coming IEC 1672 Class 1 standard. This standard will
supersede the IEC 651 and IEC 804 Type 1 standards. This
implies that the Mediator also complies with current inter-
national and national standards. The Mediator is categorized
as a Group X sound level meter according to IEC 1672, i.e. a
self-contained battery-operated instrument that requires no
external connections to other apparatus to measure sound
levels.
Basic Configuration
The Mediator comprises the following:
●
 2238 Mediator Integrating Sound Level Meter
●
 Basic SLM Software BZ 7126
●
 Microphone Preamplifier ZC 0030
●
 Prepolarized free-field 1/2 ′′ Condenser Microphone Type
4188
●
 9-pole cable with 25-pole Adaptor AO 1386 (null-modem
cable for serial interface)
●
 Shoulder Bag KE 0323
●
 Protective Cover UA 1236
●
 4 × Alkaline Batteries QB 0013
1.2.1
How Mediator Works
The Mediator can be configured to a wide range of require-
ments with different software packages or a combination of
these packages. You can easily upgrade the software via the
serial RS – 232 interface or it can be performed at a
Brüel & Kjær service centre. The Frequency Analysis Soft-
ware option requires Type 2238 – A – F (with filter set) or
a hardware upgrade (installation of filter set 2238 MUF), that 
must be made at a Brüel & Kjær service centre. If the Medi-
ator is ordered with Frequency Analysis Software BZ 7123,
the filter set is part of the instrument.
Refer to the block diagram in Fig.1.1 for an overview of how
the Mediator works. The signal from the microphone is fed
through the appropriate amplifiers, the desired filters (“A”,
“C”, “L” or octave filters (if fitted)) and correction filters
(“Sound Incidence”, “Windscreen”). The multiplexer switches
two signals (either the same signal or with different weight-
ings) through to the RMS and the RMS/Peak detectors and
succeeding Time Weighting filters. At this point the signals
are still in the analogue domain. The signals are now con-
verted in the D/A-converter and all subsequent signal process-
ing is in the digital domain. Finally the signals are fed
through the D/A-converter and the buffered signals are out-
put to the Aux 1 and Aux 2 connectors via the multiplexer.
Detectors
One of the main features of the Mediator is that it contains
two detectors with independent frequency weighting func-
tions. In the basic package, one is an RMS detector and the
other a Peak detector. Linear and A- and C-weighting can be
selected for both detectors. F (Fast), S (Slow) and I (Impulse)
time weighting must be selected in the basic version. Both
frequency and time weightings must be selected before a
measurement is performed.

Folgende Handbücher sind hierfür verfügbar:

Brüel & Kjær -- 2238 -- Bedienungsanleitung
Dateiname: BruelKJAER-9064-Manual-Page-1-Picture
Dokumenttyp: Bedienungsanleitung
Seitenanzahl: 165
Dateigröße: 2.31 Mbytes (2424130 Bytes)
Sprache: Englisch
Revision:
Dokument-ID/Nummer: BB 1119-11
Datum:
Qualität: Gescanntes Dokument, alles ist lesbar.
Upload Datum:
MD5: f059a03cf82802591afa8352ad6b5eec
Downloads: 169 seit dem 01 Juni 2017
Informationen:
Introduction
About this manual and the 2238 Mediator.
 Overview
 of
measurement parameters, menus and navigation
Getting Started
Basic introduction to the Mediator: Fitting batteries, pushkey
definitions, Measurement Window and changing the language
The System Menu
Explains how to set up parameters in the System menu
The Measurement Set-up Menu
Explains how to set up parameters in the Measurement Set-up menu
Measuring
Explains how to perform simple measurements: Calibrating,
starting a new measurement, measurement control and changing
the displayed measurement parameters
Data Handling
Explains how the data file system works: Storing, recalling,
printing
and deleting data
Printing and Transferring Data
Explains how to export data to a PC and post-processing
programs,
how to set up a printer
Maintenance and Repair
Service, repair, care, cleaning and storage of the Mediator
Specifications
Specifications for the Mediator
10
Appendix 1: General
Information about: Exchange Rate, listing of default
parameters and
interface error messages
11
12
Appendix 2: Interface
Explains the programming and operation of the serial
interface for
the Mediator: Formats for interface messages, setting up the
PC and
interface jobs
Index

About this Volume
This volume of the User Manual deals with all the general
aspects of handling and setting up the Mediator and includes
instructions for the functionality of the Basic version
(Basic SLM Software BZ 7126). If your Mediator has been upgraded
to other version(s), you must refer to the associated User
Manual(s) for the special functions related to these software
versions.

BruelKJAER-9064-Manual-Page-1-Picture
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Brüel & Kjær -- 2238 -- Bedienungsanleitung
Dateiname: BruelKJAER-9065-Manual-Page-1-Picture
Dokumenttyp: Bedienungsanleitung
Seitenanzahl: 68
Dateigröße: 1.31 Mbytes (1370492 Bytes)
Sprache: Englisch
Revision:
Dokument-ID/Nummer: BB1128-11
Datum: 01 November 1998
Qualität: Gescanntes Dokument, alles ist lesbar.
Upload Datum:
MD5: ae77bccd36f748df281acac9cc7e6c97
Downloads: 75 seit dem 01 Juni 2017
Informationen:

This volume of the User Manual deals only with the
instructions and functionality that are specific for the
Frequency Analysis module (Frequency Analysis Software BZ 7123).


Summary of Contents

Chapter 1 – Introduction: provides a general overview
of the Frequency Analysis module, its functions and in-
formation about serial frequency analysis.
Chapter 2 – Key Functions: provides information about
the key functions for the Frequency Analysis module.
Chapter 3 – Measurements Set-up Menu: gives in-
structions for setting up the measurement parameters
for the Frequency Analysis module.
Chapter 4 – Measuring: gives information about using
the Broadband Measurement Window, the Working Spec-
trum Window and the Average Spectrum Window. Gives
instructions for using the back erase function and for
setting up an Auto Start.
Chapter 5 – Data Handling: contains information
about the parameters that are saved in the Frequency
Analysis module, how to save, recall and delete data and
how to switch between displays.
Chapter 6 – Specifications: contains technical specifi-
cations for the Frequency Analysis module.
Appendix 1 – General: lists the default parameters, the
general messages and the error messages that are specific
for the Frequency Analysis module.
Appendix 2 – Interface: gives instructions for using the
interface commands and queries for the Frequency Anal-
ysis module
Index
BruelKJAER-9065-Manual-Page-1-Picture
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Brüel & Kjær -- 2238 -- Bedienungsanleitung
Dateiname: BruelKJAER-9066-Manual-Page-1-Picture
Dokumenttyp: Bedienungsanleitung
Seitenanzahl: 74
Dateigröße: 1.57 Mbytes (1643342 Bytes)
Sprache: Englisch
Revision:
Dokument-ID/Nummer: BB1125-11
Datum: 01 November 1998
Qualität: Gescanntes Dokument, alles ist lesbar.
Upload Datum:
MD5: a3ff9511be5db28fb8d0c2f4e5c2a983
Downloads: 33 seit dem 01 Juni 2017
Informationen:
This volume of the User Manual deals only with the
instructions and functionality that are specific to the
Logging module (Logging SLM Software BZ 7124)

Summary of Contents

Chapter 1 – Introduction: provides a general overview
of the Logging module and its functions.
Chapter 2 – Pushkey Definitions: provides informa-
tion about the pushkey functions for the Logging module.
Chapter 3 – Measurements Set-up Menu: gives in-
structions for setting up the measurement parameters
for the Logging module.
Chapter 4 – Measuring: gives instructions for making
a logging measurement.
Chapter 5 – Data Handling: contains information
about the parameters which are saved in the Logging
module, and how to print data.
Chapter 6 – Specifications: technical specifications for
the Logging module.
Appendix 1 – General: lists the default parameters and
interface error messages that are specific for the Logging
module.
Appendix 2 – Interface: gives instructions for using the
interface commands and queries for the Logging module
Index
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