Brüel & Kjær 2238 Level Meter
Manufacturer:
Model:
2238
Date:
Category:
Group:
Description:
Integrating Sound Level Meter
Information
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.

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User Manual
Manual type:
User Manual
Pages:
74
Size:
1.57 Mbytes (1643342 Bytes)
Language:
english
Revision:
Manual ID:
BB1125-11
Date:
01 November 1998
Quality:
Scanned document, all readable.
Upload date:
01 June 2017
MD5:
a3ff9511be5db28fb8d0c2f4e5c2a983
Downloads:
292
Information
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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User Manual
Manual type:
User Manual
Pages:
68
Size:
1.31 Mbytes (1370492 Bytes)
Language:
english
Revision:
Manual ID:
BB1128-11
Date:
01 November 1998
Quality:
Scanned document, all readable.
Upload date:
01 June 2017
MD5:
ae77bccd36f748df281acac9cc7e6c97
Downloads:
337
Information
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

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User Manual
Manual type:
User Manual
Pages:
165
Size:
2.31 Mbytes (2424130 Bytes)
Language:
english
Revision:
Manual ID:
BB 1119-11
Date:
Quality:
Scanned document, all readable.
Upload date:
01 June 2017
MD5:
f059a03cf82802591afa8352ad6b5eec
Downloads:
779
Information
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.

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