Calibration Procedures - Circuit-test DMS-4400 Manual

3. CALIBRATION PROCEDURES

Using a standard Acoustic Calibrator (94dB, 1 KHz Sine
wave)
1. Make the button settings display: dBA
Time weighting: FAST
2. Insert the Microphone nozzle carefully into the
insertion hole of the calibrator.
3. Press the A/C and the HOLD button simultaneously
for more than 1 second and the LCD will start
blinking to confirm calibration.
Acoustic calibrator
Sound level meter
6
DMS-4400