The SV 30A - two levels acoustic calibrator and the SV 31 - one
level acoustic calibrator are the State of the Art instruments. The
design of both calibrators is based on the dedicated 1/2” condenser
microphone and microprocessor controlled signal source including
SV 30A SV 31
digital static pressure and temperature compensation. These both
features assure excellent stability of the calibration levels and their
frequency. The SV 30A and SV 31 calibrators offer exceptional price
versus performance ratio on the world market.
TECHNICAL SPECIFICATIONS
Calibration signal parameters
Sound Level Pressure (SPL) 114 dB or 94 dB (SV 30A only) with respect to 20 μPa in
reference condition
Accuracy IEC 60942:2003 standard, Type 1
SPL accuracy ± 0.3 dB
Frequency accuracy ± 0.2 %
Total Harmonic Distortion (THD) less than 0.25 % for 94 dB level and
less than 0.75 % for 114 dB level
Reference conditions
Ambient temperature 23oC
Atmospheric pressure 101.3 kPa
Humidity 30 % ÷ 80 % RH
Effective microphone load volume 250 mm3
for microphone type B&K 4134
General
Effective load volume sensitivity 0.00027 dB / mm3
Level stabilisation time typically 7 seconds, maximum 10 seconds
Calibrated microphones 1/2” and 1/4” with SA 30 adapter
Storage temperature range -25oC ÷ +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 two 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 (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
