Casella-cel CEL24X Manual de usuario descargar pdf (Pagina 8)

4. A Bargraph (Refer to Figure 4 [A]) or Time History (Refer to Figure 4 [B]) will be

displayed. Refer to

INSTRUMENT SETTINGS to change the Time and

Frequency Weightings, or to change the type of display.

CEL-240/242 CEL-244/246

Figure 4 CEL-200 Series Bargraph and Time History Screens

5. The screen will display the instantaneous and maximum sound pressure levels

along with the relevant Time and Frequency Weighting. Refer to

Instrument

Settings to change these settings. Additionally, CEL-244 and CEL-246

instruments will display the average level (Leq or Lavg) since the reset button

was pressed. To reset the maximum sound pressure level and average level,

press and release the

key.

6. When the required measurements have been taken, press and hold the Power

ON/OFF key (Refer to

Switch Off) for three seconds to switch the instrument

OFF.

Note: The ‘press and hold for three seconds’ feature prevents the CEL-200 Series

being accidentally switched OFF during use.

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5. CALIBRATION

recommended

that

acoustic

calibration

using

CEL-110/2

(

CEL-110/1)

calibrator be performed

before

and

after

taking

measur emen ts

PROCEDURE

Switch

the

Acoustic

alibrator

(Refer

the

Calibrator

Instruction

Manual).

2. Check the

Acoustic

alibrator has a 114dB (or 94dB) output.

Make sure the instrument is set to the 60-130dB range.

4. Fit the

Acoustic

alibrator firmly over the microphone. The

instrument

automatically

detects

1kHz

tone

from

114dB

Calibrator

and enters

Calibration

Mode

(

Refer to Figure 5

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 20 21

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