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Organization of this manual
This manual describes the features and operation principles of the sound calibrator NC-74.
The contents of this instruction manual is based on IEC60942:2003.
The manual contains the following sections.
Outline
Gives basic information on the unit.
Controls and Features
Brie y identi es and explains all parts of the unit.
Preparations
Describes how to insert batteries and use the adapter.
Measurement
Describes the basic steps and procedures for measurement.
Reference
Describes the calibration values for sound level meter and sound calibrator. Also describes
effects of exposure to radiofrequency elds.
Speci cations
Lists the technical speci cations of the unit.
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