bb090813.book : 2236-ch4 Black 5
Chapter 4 – Measuring
Calibrating
BB 0908–13
4 – 5
Precision Integrating Sound Level Meter Type 2236
User Manual
To calibrate:
1.
Fit the calibrator carefully onto the sound level meter
and rest the sound level meter on a table or other flat
surface. Ensure that the calibrator fits snugly on the
microphone (see Fig. 4.1).
2.
For the multifunction acoustic calibrator, set it up to
calibrate at 94dB and 1kHz (see the calibrator’s instruc-
tion manual).
3.
Switch on the calibrator.
The calibrator emits a 1kHz calibration signal.
4.
Follow the instructions given in the figure below to cal-
ibrate to the relevant level for the type of measurements
to be made:
*
4.1.3
Checking the Sound Level Meter’s
Calibration
Follow the instructions given in section 4.1.2 until the sound
level meter asks whether you want to recalibrate or not. Press
〈
NO
〉
twice to return to the main screen.
* For Sound Level Calibrator Type 4231, choose a calibration level of 94 dB for diffuse
field or 93.8 dB for free field. For Multifunction Acoustic Calibrator Type 4226, choose a
calibration level of 94 dB for both diffuse and free field.
