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SV 36 Acoustic Calibrator

The SV 36 acoustic calibrator is a small, portable dual-range Class 1 device (sound source). Powered by two LR03/AAA batteries, it contains a loudspeaker producing acoustic pressure of defined level 94 db & 114 dB at frequency of 1 kHz.

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Reference piezoresistive sensor for monitoring generated level, pressure and temperature sensors for measurements of atmospheric conditions and a microprocessor system controlling the operation of the calibrator. Sinusoidal waveform of 1 kHz frequency is digitally generated and feeds the loudspeaker. Sampled signal from the reference piezoresistive sensor indicates the level of currently generated signal in a feedback loop. On the basis of information about the level of the signal, actual values of pressure and temperature, microprocessor adjusts amplification of the loudspeaker signal in order to produce appropriate sound pressure level in the calibrator’s chamber.

SV 36 Acoustic Calibrator

Calibration Signal Parameters:

Sound Pressure Level (SPL)	114 dB or 94 dB
IEC 60942:2003 Accuracy	Class 1
SPL Tolerance	± 0.3 dB
Frequency Tolerance	± 0.2
Total Harmonic Distortion (THD)	< 0.50 % for 94 dB
	< 0.75 % for 114 dB level

General Information:

Effective Load Volume Sensitivity	0.00027 dB / mm3
Level Stabilisation Time	typically 15 s, max 30 s
Calibrated Microphones	1/2” and 1/4” with SA 30 adapter
Storage Temperature Range	-25 °C ÷ +70 °C
CE Classification	EN 61010-1: 2010
	EN 61326-1:2006
	EN 61326-1:2006
	EN 60942:2003

Working Conditions:

Temperature Range	from -10 °C to +50 °C
	(related SPL error ≤ ±0.15 dB)
Atmospheric Pressure Range	from 65 kPa to 108 kPa
	(related SPL error ≤ ±0.10 dB)
Humidity Range	from 25 % to 90 % RH
	(related SPL error ≤ ±0.05 dB)

Reference conditions:

Ambient Temperature	23 °C
Atmospheric Pressure	101.3 kPa
Humidity	30 % ÷ 80 % RH
Effective Microphone Load Volume	250 mm3 for microphone type B&K 4134

Power supply:

Battery Type	2 x LR03 (IEC) / AAA (ANSI) alkaline batteries
Continuous Operating Time	40 hours for 94 dB level,
	30 hours for 114 dB level
Stand-by Period	around two years
Minimal Voltage Requirements	2.1 V

The policy of our company is to continually innovate and develop our products. Therefore, we reserve the right to change the specifications without prior notice.

SV 36 calibrator datasheet