소음교정기 CTL100
CTL100
The automatic check consists in comparing sound level meter value with level produced by CTL100
The principle allows to periodically check sound level meter performance, especially the microphone performance which is the sensing element of the instrument.
Technical data
Frquency : 1000 Hz ± 5%
Level : 90 dB ± 1dB
Stability : < 0.5 dB
