Casella-cel CEL-281 Manual de usuario descargar pdf (Pagina 100)

Provided the CEL-281 is not in calibration delay mode or calibration

mode, and the display is switched ON, it can be used as follows to ob-

tain and display noise dose information at any time, without interrupting

any logging that might otherwise be occurring.

1. Load and/or check batteries, perform a field accuracy check

(acoustic calibration), select time and frequency weightings, and

enter the fully operational state with the display switched ON,

(with or without data logging) as described in Chapter 4.

If the instrument has just been calibrated or the 20 second

calibration delay period has elapsed, it will enter the sound level

meter measurement area automatically.

The LAVG legend will appear, while the main display shows

average sound levels in dB, either using whichever of the time

weightings and frequency weightings have just been selected,

or those used last time the instrument was operated.

2. Press the key to enter the noise dose measurement oper-

ational area.

If data is being logged, logging will continue uninterrupted, but

the display will change to indicate whichever of percent dose

(% Dose) or projected percent dose (P% Dose) was used last

time the instrument was operated, using whichever of the time

weightings, frequency weightings, and exchange rate values

(Q) were used last time

3. Press the key again to change from % Dose measurement

to P% Dose measurement, or vice versa.

Obtaining Required Results

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Casella-cel CEL-281 Manual de usuario Pagina 100