Model 90 Quantifier Sound Level Meter
Page 5
Preface
Thank you for purchasing this MODEL 90 Series Sound Level Meter from Pulsar
Instruments Plc. This powerful instrument provides excellent expansion capability, and
has been designed to provide reliable, accurate measurements over a long period of
time.
This manual describes the procedure that should be followed to set up and operate the
MODEL 90 Sound Level Meter, as well as comprehensive technical information, using
optional accessories as well as troubleshooting.
This manual also contains the information regarding the MODEL 106 and MODEL 105
Acoustic Calibrators.
If you are a new user of Sound Level Meters or new to the MODEL 90 Sound Level
Meter, first read Section 1 Introduction to familiarise yourself with the features,
components and accessories supplied. Then read Section 2 Getting Started for step-by-
step instructions on how to use the instrument.
The different versions of the MODEL 90 are:
MODEL 91 Class 1 Broadband Only
MODEL 92 Class 2 Broadband Only
MODEL 93 Class 1 Broadband with 1:1 Octave Band Filters
MODEL 94 Class 2 Broadband with 1:1 Octave Band Filters
MODEL 95 Class 1 Broadband with 1:1 & 1:3 Octave Band Filters
MODEL 96 Class 2 Broadband with 1:1 & 1:3 Octave Band Filters
The MODEL 90 Sound Level Meters meet the requirements for Class 1 and Class 2 of
IEC 61672-1:2002 standard for Class 1 Group X or Class 2 Group X Sound Level Meters
as appropriate.
They also meet the requirements for Class 1 and Class 2 according to IEC 60651 and
60804 depending upon the version of the instrument. Please refer to page 56 for full
technical details of the MODEL 90 Sound Level Meters.
To meet the requirements of ANSI S1.4 for Random Incidence microphone response, an
NK:70 Random Incidence Adaptor should be used when making measurements. Please
refer to page 17 for details of the use of the NK:70 Random Incidence Adaptor.
Messages and Symbols
Messages are used in this manual to bring important information to your attention. The
different message types are indicated as shown below.
Pay attention! A caution informs you that improper use of the equipment or
failure to follow instructions may cause data loss or may damage the
equipment.
