Extech Instruments SL400

16SL400‐en‐GB_V1.02/16
Maintenance

BatteryReplacement
Whenthebatteryicon( )appearsontheLCD,thebatterymustbereplaced.Turnoffthe
meterandremovetherearbatterycover.Removebatteryfromthebatteryholderandinserta
new9Vbattery(Alkaline)observingcorrectpolarity.Re‐installthebatterycover.
o Pleasedisposeofbatteriesresponsibly;observeallregulations.
o
Neverdisposeofbatteriesinafire;batteriesmayexplodeorleak.
All EU users are legally bound by the Battery Ordinance to return all used batteries to
communitycollectionpointsorwhereverbatteries/accumulatorsaresold!
Disposalinhouseholdtrashorrefuseisprohibited!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end
ofitslifecycle
Cleaning
Tocleantheinstrume nt,useasoftdryclothtoremovedustfromthemeterhousing.Donot
touchthemicrophonesoundentryport.Neverusewetcloths,solvents,orliquidstocleanthe
meterhousing.
A,C,andZWeightingConsiderations
The A weighting curve is based on 40 Phon fletcher‐Munson Equal Loudness Contour. For noise
assessmentsoftheeffectsofnoiseonhumanhearing,theAweightingmodeisrecommended.

TheCweightingmodeisrecommendedformachinesoundmonitoring(steady,dronetype).

The Zweighting offers a linear signal response that is notprocessed through themeter’s filter. Z
weighting is suitable for monitoring electrical signals (ACor DC signals for research purposes, for
example).


AppendixA

DoseStandardsSelectionlist

OSHA OccupationalSafetyandHealthAdministration(USA)
MSHA MineSafetyandHealthAdministration(USA)
DoD DepartmentofDefense(USA)
ACGIH AmericanConferenceofGovernmentalIndustrialHygienists(USA)
ISO85 European
ISO90 European
User Userdefinedparameters(settingscanbesavedtoafileImport/Export)
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