Sound level calibrator SV 36

portablehand-held

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. 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