Table of Contents
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CHAPTER 1
Introduction............................................................................................................................. 1
1.1
What is Multifunction Acoustic Calibrator Type 4226? ............................................................ 1
1.2
How the Calibrator Works ........................................................................................................ 2
CHAPTER 2
The Parts of Multifunction Acoustic Calibrator Type 4226 ........................................................ 7
2.1
What's Included ........................................................................................................................ 7
2.2
Controls on the Front Panel...................................................................................................... 8
2.3
Controls on the Side Panel...................................................................................................... 12
CHAPTER 3
Operation .............................................................................................................................. 13
3.1
Environmental Conditions ...................................................................................................... 13
3.2
Battery Installation ................................................................................................................. 13
3.3
Preparing for Acoustic Calibrations ........................................................................................ 14
3.4
Frequency Response Calibrations of Listed Microphones ...................................................... 16
3.5
Frequency Response Calibrations of Unlisted Microphones .................................................. 17
3.6
Checking the Differential Level Linearity of Brüel & Kjær Sound Level Meters...................... 18
3.7
Checking the "F" and "S" Time Weighting .............................................................................. 19
3.8
Checking the Crest Factor Handling........................................................................................ 21
3.9
Calibrating a Noise Dose Meter .............................................................................................. 23
3.10
Using the AC Output ............................................................................................................... 24
3.11
Using an External Generator................................................................................................... 25
CHAPTER 4
Maintenance and Service....................................................................................................... 27
4.1
Storage and Handling.............................................................................................................. 27
4.2
Service..................................................................................................................................... 27
CHAPTER 5
Specifications......................................................................................................................... 29
APPENDIX A
Corrections and Adjustments................................................................................................. 33
A.1
The Sound Level in the Coupler - Using the Internal Signal Generator.................................. 33
A.2
The Sound Level in the Coupler - Using an External Signal Generator .................................. 35
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