Unless stated otherwise, the specifications given are for the complete sound level meter Nor150 equipped with
microphone type Nor1225 and microphone preamplifier type Nor1209. Values are based on the sensitivity set to
the nominal value for the microphone: �26.0 dB corresponding to 50 mV/Pa.
A microphone cable Nor1408 of length up to 20 m may be used between the microphone preamplifier and the
instrument body without loss of performance. Longer cables may be used if maximum sound pressure level
or frequency is reduced.
The definition of terms is based on IEC 61672-1 (2002-5): Electroacoustics - Sound level meters - Part 1: Specifications. The options included in the basic instrument may vary. Please check with your local supplier for the latest information.
When the instrument is equipped with two sound channels, the specifications are the same for both channels.