SV 33A USER MANUAL
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The SV 33A is designed for calibration of sound level meters with ½”
microphones. Picture 2 shows the way of insertion of a ½” microphone into calibrator.
Picture 2. Calibration of the personal exposure meter with a ½” measurement microphone
2.2. Usage of the calibrator
2.2.1. Button functions
The SV 33A calibrator is equipped with a button for controlling operation of the
device. The button is used to turn ON and OFF the device. In this case the button
pushing has immediate effect.
Either when the SV 33A is ON or OFF pressing the button over 10 seconds and
releasing it will cause full reset of the system. Normally this function is not necessary.
It has been implemented in the case of inappropriate operation of the calibrator
caused by external (EM radiation, subnormal atmospheric conditions, etc) or internal
(inappropriate system reset as a result of battery replacement, etc) factors.
The operation time of the calibrator with a microphone put inside its chamber
is limited to 3-5 minutes. This functionality was added in order to save the battery,
e.g. when the calibrator is accidentally left with the microphone inside.
