Casella-cel CEL-281 Manual do Utilizador descarregar pdf (Página 107)

4. Press the key to display the relevant cumulative percent

values.

5. Press the key to display the relevant probability percent

values.

6. Then press either or keys to select the other para-

meter (% or dB) in the current histogram for display.

7. Press or keys to select respectively, the next higher

or lower distribution value or dB level cell in the currently dis-

played histogram.

5.5 Profiles

The CEL-281 stores up to fourteen hours of noise history data in the

form of profiles with noise levels and times accurately recorded. Pro-

vided the instrument has already stored some data, is not in calibration

delay mode or calibration mode, and the display is switched ON, it can

be used to display the stored profile information as follows.

LAVG

1 SEC

dBA

910038

Figure 18: Typical display showing 1 second L level in dB(A)

Obtaining Required Results_

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 146 147

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Casella-cel CEL-281 Manual do Utilizador Página 107