Extech Instruments SL400

10SL400‐en‐GB_V1.02/16
ManualModeCalibration
SetthemetertoSLMmode,Aweighting,Highrange,andSlow.
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Attacha94.0dB(1000Hz)soundcalibratortothemicrophoneandwaitforabout1minuteand
notethesoundvalueonthedisplay.Writedownthevalue.
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Calculatethevalueoftheoffsetfromthedisplayedvalueto
thesourcednoiselevel.
Inthisexamplethevalueis+1.3(94.0dBsourced,and92.7dBdisplayed)
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EnterSetmodeandgototheparameter94ADJ.
UsingtheUpanddownarrowssettheoffsetaccordingtotheoffsetcalculated.
Inthisexample–set94ADJto1.3
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PresstheEnter
keytosavetheentryandtogetbacktothemeasurewindow.
Themetershouldnowread94.0dB(+/‐0.1dB).
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