User manual

407780A‐EU‐ENv1.34/14

Calibration

CalibratingtheIntegratingSoundLevelDataloggerrequiresanacousticalcalibratorsuchasthe

ExtechModel407766or407744.

1. Configurethemeterasfollows:

• Display:SPL(dBA)

• Timeweightingmode:FAST

2. Insertthemicrophoneintotheopeningoftheacousticalcalibrator.

3. SwitchthecalibratorON.

4. Adjust

themeter’scalibrationpotentiometerasshowninthe

accompanyingdiagramuntilthemeter’sdisplaymatchesthe

acousticalcalibratoroutputsignal(typically94or114dB).

5. SwitchthecalibratorOFF.

6. Removethecalibratorfromthemicrophoneveryslowlytoavoid

damagingthemicrophone.

7. Incaseswhereadjustingthepotentiometer

doesnotaffectthe

displayedreading,orwheretheadjustmentcannotproducethe

appropriatedisplayedreading,pleasereturntheunitforservice.

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