B&K 2245 - CHECK THE CALIBRATION; How to Perform a Calibration Check

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CHECK THE CALIBRATION
It is a best practice to check the accuracy of your instrument before and after measuring by performing a calibration
check. A calibration check is not a calibration. Calibration includes an adjustment of the instrument's sensitivity. A cal-
ibration check compares the current sensitivity of the instrument with the sensitivity from its initial calibration, checking
that it has not changed too much.
When you place a sound calibrator on the microphone, the instrument detects the tone and automatically checks the
deviation of the sensitivity of the instrument from its initial calibration.
How to Perform a Calibration Check
You will need:
l
The instrument
l
A sound calibrator such as Type4231
A sound calibrator generates a known sound level, against which the measured level can be checked. Type4231
generates a tone at 1kHz with levels at 94dB or 114dB
✐ Note: Be sure to add the calibrator's serial number in the calibration settings of the instrument. Go to:Menu
> System settings >Advanced settings > Calibration > Type 4231 no.
Procedure:
1.
Turn on the instrument.
✐ Note: Ensure that the instrument is not measuring and that the menu is not open.
2.
Gently seat the calibrator on the microphone.
Check the Calibration: How to Perform a Calibration Check