CASELLA CEL CEL-490 Manual de usuario descargar pdf (Pagina 23)

CEL-63x Environmental Noise Meter

23 Casella CEL

4 Detailed description

4.1 Microphone and pre-amplifier

The CEL-63x instrument has a removable ½-inch (12.7 mm) microphone. This

is a pre-polarised microphone that uses a permanently charged material in its

construction.

The instrument is supplied with a windshield. The windshield provides

protection from wind and from minor mechanical damage. The windshield

should always be fitted to the microphone.

There are two classes of microphone available, which have different

sensitivities.

The Class 1 microphone (CEL-251) has 50 mV/Pa sensitivity

The Class 2 microphone (CEL-252) has 30 mV/Pa sensitivity

4.2 User controls

Soft keys

The Soft keys select between the two options showing at the bottom of the

screen. These two options change, depending on which screen is showing on the

instrument‟s display. Therefore, the Soft keys can have different functions,

depending on which screen the instrument is showing.

Usually, you must press the Soft key on the right to select a function, and you

must press the Soft key on the left to exit a screen or cancel a function.

Press the Soft key for the option that you need to select that option.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 77 78

Sin comentarios

CASELLA CEL CEL-490 Manual de usuario Pagina 23