B&K 2250 Light, User Manual, Page: 52 / 208

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2250 Light – User Manual
• The connected transducer: type and serial number
Note: you select a new transducer by tapping on the Main Menu icon and selecting
Setup , followed by Input )
• A Calibration History link: which is provided to enable you to view a history of transducer
and calibration settings, see below
• Max. Input Level : the maximum sinusoidal input level to be measured without overload
indication
The calibration settings can be adjusted as follows:
• Calibrator : select between Type 4231 and a custom calibrator
• Calibration Level : type in the specific level of your custom calibrator. If you are using a
Type 4231 calibrator, then the level of the calibrator is automatically detected, (shown as
Auto detect on the screen)
Note: The Auto detect setting enables the calibration process to automatically detect the
calibration level. For free-field types of microphones (like Type 4950) the calibration level
from a Type 4231 calibrator 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
5.3 Calibration History
You select the calibration history by tapping on the Calibration History link on the Calibration
Details screen, see Fig.5.2.
2250 Light saves the last 20 calibrations, plus the initial calibration, which can be viewed on
the Calibration History screen, see Fig.5.3. When you have finished, tap to return to the
calibration details screen and then tap again to return to the measurement screen.
Fig.5.3
Calibration History
screen