Bruel & Kjaer 2231 Modular Precision Sound Level Meter

• Description
• Features
• Specifications

Description

Modular Precision Sound Level Meter Type 2231 is a type 1 precision instrument with a wide range of measurement capabilities. It is convertible, a family of interchangeable modules enabling it to be used for numerous applications. The characteristics of the Sound Level Meter are determined by the module selected for use. The software contained in the module is loaded into the Sound Level Meter, defining the parameters that can be measured.

In general, the Type 2231 performs simultaneously a number of mea¬surements on a signal. A unique feature is that Peak and RMS detection arc carried out in parallel, allowing each portion of the same signal to be viewed at the same time. A very wide frequency range of 2Hz to 70 kHz allows measurements in the infrasound and ultrasound regions.

A number of Special Functions can be implemented with Type 2231, including automatic printout of data at the end of preset time periods. Also, a data inhibit function ensures that sound measurements incor¬porating time wise integration are not spoiled by spurious events.

Since Type 2231 has a selectable polarization voltage, almost any mi¬crophone in the Bruel & Kjaer range may be used. With Microphone Type 4133 plus extension cable UA0027 it becomes a type 0 instru¬ment, in accordance with IEC 651 recommendations.

Features

• Fulfills IEC 804 type 1, relevant sections of IEC 651 type 1 I, and ANSI S1.4-1983 type 1
• Easy to read liquid crystal alphanumeric and quasi-analogue display
• Selectable polarization voltage allows use of almost any microphone in the Bruel & Kjaer range
• RMS and Peak detection in parallel
• 73 dB Pulse range; 70 dB RMS Linearity range
• 24 to 113 dB (A) measuring range (30 to 133 dB (A) with attenuator) in 7 overlapping sub-ranges
• A, C, Lin. and All-pass weightings
• Extra wide all-pass frequency range allows infrasound and ultrasound measurements
• Internal memory has back-up battery power which prevents loss of application software and data when the instrument is switched off
• Facility for connection of Bruel & Kjaer Serial Interface communication port, allowing external control and output of measurement data
• When used with Microphone Type 4133 and Extension Cable AO 0027, fulfills IEC 804 type 0 and relevant section of IEC 651 type 0I

Bruel & Kjaer 2231 Applications