Instruction Manual

Sound Level Meter Types 2245 – Instruction Manual Page 16 of 110
4. Use right arrow button to enter Calibration and insert the Calibrator serial
no. (use up/down arrow buttons to change the number)
5. Use right arrow button to enter Calibrate:
6. Fit Sound Calibrator Type 4231 carefully onto the microphone of the sound
level meter. To avoid handling vibrations that disturb the calibration, rest the
assembly in a roughly horizontal position on a table or other flat surface.
Ensure that the calibrator fits snugly on the microphone.
7. Switch on the calibrator. Wait a few seconds for the level to stabilize.
8. Press the button to start the calibration
9. Detection signal appears on the screen as feedback. When the signal has
been detected and verified for a while, then the sensitivity is calculated and
displayed on the screen together with deviations from last calibration and
from initial calibration: