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SV 36 Class 1 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.

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 AccuracyClass 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 Sensitivity0.00027 dB / mm3
Level Stabilisation Timetypically 15 s, max 30 s
Calibrated Microphones 1/2” and 1/4” with SA 30 adapter
Storage Temperature Range-25 °C ÷ +70 °C
CE ClassificationEN 61010-1: 2010
EN 61326-1:2006
EN 61326-1:2006
EN 60942:2003
Working Conditions:
Temperature Rangefrom -10 °C to +50 °C

(related SPL error ≤ ±0.15 dB)
Atmospheric Pressure Rangefrom 65 kPa to 108 kPa
(related SPL error ≤ ±0.10 dB)
Humidity Rangefrom 25 % to 90 % RH
(related SPL error ≤ ±0.05 dB)
Reference conditions:
Ambient Temperature23 °C
Atmospheric Pressure101.3 kPa
Humidity30 % ÷ 80 % RH
Effective Microphone Load Volume250 mm3 for microphone type B&K 4134
Power supply:
Battery Type2 x LR03 (IEC) / AAA (ANSI) alkaline batteries
Continuous Operating Time40 hours for 94 dB level,
30 hours for 114 dB level
Stand-by Periodaround two years
Minimal Voltage Requirements2.1 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.

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