The Larson Davis Model
CAL250 is an ultra precise microphone calibrator delivering a full
114.0 dB level output signal. Its accuracy has been verified against
the reference issued by the National Institute of Standards and
Technology (formerly National Bureau of Standards).
Special adapters make
possible the use of 1/4 and 3/8 inch microphones.
compensation sensors provide accurate calibrations in extreme
- Noisy industrial environments (95
- Temperature changes of 0 to 50 C (32 to 122
- Barometric pressure changes of 400 to 1100
- An effective
volume of > 100 cm2 (6 in2 ensures
accurate calibration, even if the microphone and microphone adapter
are not fully seated.
- An accurate tone is
maintained even with a weakened battery.