Soft dB Piccolo User guide - Manual (Page 19)

Piccolo SLM User guide-Rev. 4.3 - 18 -
PICCOLO PC OPERATION
CALIBRATION MENU
The sensitivity of Each Piccolo Integrating SLM unit is adjusted at the factory. The user can verify and/or
proceed to a new calibration using the Calibration menu.
Note: Calibrating the Piccolo Integrating SLM requires an acoustical calibrator (not provided) that
produces 94 dB at 1 kHz.
1. Verify that the meter reads 94 dB by configuring the meter as follows:
• Display: SPL [dB(A)]
• Time weighting mode: FAST
2. Insert the Piccolo into the acoustical calibrator and click on the Calibration tab. Select Start
Calibration. Follow the on-screen steps to calibrate the Piccolo SLM microphone (see figure
6)
3. Save the calibration to the PC with the Save calibration into file button.
Note: The calibration can also be loaded with the Recall calibration from file button.
Figure 6: Calibration menu
Frequency response
The Frequency response of each Piccolo is measured at the factory according to CEI standard 61672-3:
2006-10 - "Sound Level Meters - Periodic Tests" and/or with a BK-4226 Multifunction acoustic calibrator.
The Frequency response of the unit is display on the upper graph of the Calibration Tab as the tolerance of
the CEI standard.
Start Calibration
Save / Load Calibration
Frequency Response