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> Bruel & kjaer 2231 sound level meter & b&k 4165 mic
Bruel & kjaer 2231 sound level meter & b&k 4165 mic
Bruel & Kjaer 2231 Sound Level Meter & B&K 4165 Mic
***Includes B&K 4165 Microphone as shown ***
Bruel & Kjaer 2231 Modular Precision Sound Level Meter
* 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)
We have tested this item using a multi-level, multi-frequency Acoustic Calibrator and it works. The unit is sold as "Tested and Working" and comes with a self test warranty. It is not calibrated.
