Microphone and Preamplifier
The Nor145 is normally delivered with a Nor1225 microphone and a Nor1209 preamplifier.
The microphone system is easily configured in the Nor145 as they are "predefined" in the transducer set up system.
It is a good idea to give your input device a name that is easy to remember.
Before and after a measurement series it is reccommended to do a check of the sound level using a Norsonic sound calibrator.
If both the calibrator and the complete Nor145 (including microphone and preamplifier) have been sent to an accredited
laboratory like NCL you should have correct values to use for the calibration check.