SV 31 Acoustic Calibrator
PTB APPROVAL 21.5/ 08.05

SV 31

Acoustic Calibrator

The SV 31 type 1, one level acoustic calibrator is the State of the Art instrument. The design of this calibrator is based on the dedicated ½" condenser microphone and microprocessor controlled signal source including digital static pressure and temperature compensation. These both features assure excellent stability of the calibration level and its frequency. The SV 31 calibrator offer exceptional price versus performance ratio on the world market.

With the SV31 acoustic calibrator it is possible to calibrate the ½" microphones and ¼" microphones using SA30 diameter reduction.

FEATURES

  • Type 1 sound calibrator IEC 60942
  • Frequency 1 kHz
  • 114 dB levels
  • PTB type approval
  • ½" internal reference condenser microphone
  • Microphone presence detection
  • Automatic power on/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)
     
SV 31 Technichal specifications

Calibration signal parameters

Sound Level Pressure (SPL)

114  dB with respect to 20  µPa in reference condition
Accuracy IEC 60942:2003 standard, Type 1
SPL accuracy ± 0.3 dB
Frequency accuracy ± 0.02 %
Total Harmonic Distortion (THD) less than 0.75 % for 114 dB level

Reference conditions

Ambient temperature

23 oC
Atmospheric pressure 101.3 kPa
Humidity 30 % ÷ 80 % RH
Effective microphone load volume 250 mm3, microphone type B&K 4134

General

Effective load volume sensitivity

0.00027 dB / mm3
Level stabilization time typically 7 seconds, maximum 10 seconds
Calibrated microphones ½" and ¼" with SA 30 adapter
Storage temperature range -25 oC ÷ +70 oC
CE classification

EMC: EN 50081-1, EN 50082-1
Safety: EN 61010-1:2001

Working conditions

Temperature range

from -10 oC to +50 oC (related SPL error ≤  ±0.15 dB)
Atmospheric pressure range from 65 kPa to 108 kPa (related SPL error ≤  ±0.1 dB)
Humidity range from 25 % to 90 % RH (related SPL error ≤  ±0.05 dB)

Power supply

Battery type

2 x LR03 (IEC) / AAA (ANSI) alkaline batteries
Continuous operating time

30 hours for 114 dB level
Stand-by period around two years (auto switch ON / OFF)
Minimal voltage requirements 2.1 V

Overall weight and dimensions

Weight

305 grams including batteries
Dimensions 65 x 65 x 70 millimetres
SV 31 - 10 Reason Why to Choose
  1. The State of the Art instrument.

     
  2. Type 1 calibrator.

     
  3. Excellent parameters, thanks to reference ½" condenser microphone and microprocessor controlled signal source including digital static pressure and temperature compensation

     
  4. Exceptional price versus performance ratio on the world market.

     
  5. Instrument can calibrate ½" microphones like also ¼" microphones with SA30 diameter reduction.

     
  6. Easy in use, microphone presence detection.

     
  7. Battery saving, automatic power on/off by photo detector.

     
  8. Long time operating on one battery set (2 years standby/30 hours continuous operation time)

     
  9. Ergonomic shape.

     
  10. Robust case.
SV 31 - User Manual
Click below to download

User Manual
Appendixes

CE Declaration of Conformity