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> Bruel& kjaer modular precision sound level meter 2231
Bruel& kjaer modular precision sound level meter 2231
Modular Precision Sound Level Meter
Bruel & Kjaer 2231 Applications:
* 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
* Measurement os Leq and LEA,T (SEL)
Bruel & Kjaer 2231 Specifications:
Measurement ranges with standard microphone (Type 4155):
Lower limit for S/N ration > 5 dB
Upper limit for signals of crest factor 10 (= 20 dB)
Frequency Weighting: A, C weighting in accordance with IEC 651 type 0
