SV 33A Class 1 Acoustic Calibrator produces an acoustic pressure of defined level 114 dB at frequency of 1 kHz. The SV 33A is suitable for calibration of Class 1 and Class 2 sound level meters and dosimeters with 1/2 microphones.

Unlike many others, the Svantek calibrators feature a robust housing that gives the comfort of a secure grip to the user. The interior design of our acoustic calibrators is based on the reference microphone and microprocessor controlled signal source including digital static pressure and temperature compensation. Due to the feedback regulation control loop our calibrators do not require any adjustments by the user and operate over a wide range of ambient temperature and humidity assuring excellent stability of the calibration levels and their frequency. Each acoustic calibrator is provided with a statement of the calibration which allows the user to be certain that their instruments will measure correctly.

Features

• Class 1 sound calibrator IEC 60942
• Frequency 1 kHz
• 114 dB level
• Internal reference MEMS microphone
• Automatic power off
• Dimensions 65 x 65 x 70
• 2 x AAA batteries
• Easy in use
• Hand held, light weight and robust case (only ca 300 grams including batteries)

• Svantek_SV_33A_Class_1_Acoustic_Calibrator_datasheet

Specification

• Calibration signal parameters

• Sound Pressure Level (SPL)  :  114 dB
• Accuracy to IEC 60942:2003  :  Class 1
• SPL accuracy  :  ± 0.3 dB              
• Frequency accuracy  :  ± 0.2 %
• Total Harmonic Distortion (THD)  :  < 0.75 %

General Information

• Effective load volume sensitivity  :  0.00027 dB / mm3 0.00027 dB / mm3
• Level stabilisation time  :  typically 15 s, max 30
• Calibrated microphones  :  1/2” and 1/4” with SA 30 adapter
• Storage temperature range  :  -25oC ÷ +70oC
• CE classification  :  EN 61010-1: 2010; EN 61326-1:2006; EN 55022:2010; 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 oC
• Atmospheric pressure  :  101.3 kPa
• Humidity  :  30 % ÷ 80 %
• 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  :  30 hours
• Stand-by period  :  around two years (auto switch OFF)
• Minimal voltage requirements  :  2.1 V