Casella-cel CEL-281 Manual de usuario descargar pdf (Pagina 51)

When the instrument is stopped, (i.e. the + com-

bination has been pressed so that no logging is taking place),

and in consequence is still fully operational but not displaying

the RUN symbol, the key clears out all previously stored

data, displays the RUN symbol and starts logging data as the

clock passes the next full minute of time.

3.3.5 Noise Level Key

(grey two-function key: yields noise level information)

While in calibration delay or calibration modes, or if the display

has been switched off, this key will be ignored.

When the instrument is fully operational, this key cancels any

other display mode that has been selected and allows level in-

formation to be displayed without interrupting any logging that

may be taking place. It toggles the display between sound pres-

sure levels (SPL measured in dB) and sound exposure levels (E

or E , depending on the frequency weighting in use, measured

in Pa

h).

While sound pressure levels are being displayed, repeatedly

pressing the or keys enables the following parame-

ters to be selected.

• Sound pressure level with Fast time weighting,

• Maximum level with Fast time weighting

• Sound pressure level with Slow time weighting,

• Maximum level with Slow time weighting

• Average noise level.

How It Works

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Casella-cel CEL-281 Manual de usuario Pagina 51