B&K 2250 Light Manuel d'utilisateur télécharger pdf (Page 50)

Hand-held Analyzer 2250 Light – User Manual

This screen displays the following information:

• Details of the last calibration: date, sensitivity, deviation from last calibration and deviation

from initial calibration

• The connected transducer: type and serial number

Note: Select a new transducer by tapping on the Main Menu icon and selecting Setup,

followed by Input)

•A Calibration History link: provided to enable you to view a history of transducer and

calibration settings, see below

• Max. Input Level: the maximum sinusoidal input level measured without overload indication

The calibration settings can be adjusted as follows:

• Calibrator: select between Type 4231 and a custom calibrator

• Calibration Level: Enter the specific level of your custom calibrator. If you are using,

Type 4231, calibrator level is automatically detected, (shown as Auto detect)

Note: The Auto detect setting enables the automatic detection of the calibration level. For

free-field microphone types (like Type 4950) the calibration level from Sound Calibrator

Type 4231 is either 93.85 dB or 113.85 dB. For diffuse- or pressure-field types, the

calibration level is either 94 dB or 114 dB. The calibration process automatically

determines the correct level

• Calibrator Serial Number: type in the serial number for your calibrator. The calibrator will

be documented in the calibration history

5.4 Calibration History

To view calibration history, tap Calibration History > on the Calibration Details screen (Fig.5.2).

The analyzer saves the last 20 calibrations, plus initial calibration, which can be viewed on the

Calibration History screen (Fig.5.3). Tap to return to the calibration details screen; tap

again to return to the Measurement screen.

Fig.5.3

Calibration History

screen

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 211 212

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B&K 2250 Light Manuel d'utilisateur Page 50