3M eg4 user manual Measurement equations

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Appendix B

Glossary of Terms

Measurement equations

The following equations are used in the Edge calculations. Some of the terms used in these equations are explained in Table B-1 while others are explained above in the “Glossary of Terms” section.

DOSE = 100TC [∫0RTIME 2(LS−CL)/(ER)dt ]%

Prd8 hours = DOSE ⋅ RTIME %

Pr t

Prd⋅ hours = DOSE ⋅ RTIME %

LAVG= ER[log2 ∫2LS/ 3.01dt − log2(RTIME) ]dB

053-644, Rev H

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eg4

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Contents Edge 3M The Edge Personal Noise DosimeterTable of Contents Setting-up the Edge via DMS Time history……………………………………………………………………………………………………Stopping a study Viewing measurements on the displayTechnical Support Replacing microphone and windscreenPhysical attributes of EdgeDock1 and EdgeDock5 INDEX…………………………………………………………………………………List of Figures List of TablesDosimetry Edge and dosimetryNoise dosimeter Illustration of how the dosimeter operates and processesRange of sound What do the standards say?Applications of the Edge Setting-up your dosimeter parameters for your noise studies Noise assessment stepsRunning your studies View your results via DMSParameter setup screen for eg4 Edge ModelChecking the equipment Identifying your equipmentLED indicator Turning onLED indicators explained Turning offDiagram Display and keypad3MTMDetection Mangement Software DMS Docking station functionalityLoading Docking station components EdgeDock1 or EdgeDock5EdgeDock1 and EdgeDock5 components Powering EdgeDock1 or EdgeDock5  Powering EdgeDock1 or EdgeDock5 How to charge Charging your dosimeterMounting the docking station to a wall Storing the dosimeterUnderstanding what data is stored Noise studiesSummary data Time historyViews on the Edge LoggingDefinitions of data log values and views Views on ExplanationDosimeter views and definitions Weighting Views on Explanation EdgeDose Response LevelDescriptors Variants Lmax variants Dosimeter measurement descriptors/variantsDocking Communicating & downloading dataCustomizing set-up parameters in DMS New Hardware wizard for Edge DockDosimeter setting Dosimeter screenEdge dosimeter settings Dosimeter fields explained for the EdgeDisplay setting Edge display screenSecurity setting Edge security settingAuto Run setting Edge auto run screenFirmware update 10 Edge firmware update screenSaving and sending/setting configurations 11 Saving and sending Edge setupsOverview of running a study Quick Help List typical dosimetry sessionWindscreen and maintenance  How to attach the dosimeterPositioning the Edge on your shirt Checking battery power  Checking battery powerCalibrating  Calibrating the dosimeterResetting the dosimeter  ResetSetting contrast on dosimeter  ContrastOn/off/enter button  How to run a noise study Running studiesStarting a run Indicators/Icons on the display  How to stop a noise studyIndicator Icon Explanation Indicators i.e., run, stop, battery, and OLViewing measurements on the display Locking or securing your dosimeter during run Viewing measurements  How to lock or secure  How to unlockLocking or Securing UnlockingDownloading data  DownloadingDMS start screen Viewing data and data finder  Selecting and viewing dataReport View Example of Edge Report in DMSPanel Layout Viewcharts/graphs Panel layout view viewing the data in charts and graphsLED indicator disable/enable Technical SupportReplacing microphone and windscreen Attaching/Detaching Attaching/Detaching the windscreen and microphone Hard Hat Attachment Kit Hard Hat Attachment kitMechanical characteristics StandardsElectrical characteristics Environmental effectsUser Interface EdgeDock1 and EdgeDock5 Physical attributes of EdgeDock1 and EdgeDock5Measurements TypesMeasurement parameters Communications Special functionsSecurity Auto-RunEdge Block Diagram Edge Block Diagram Appendix B 3M Service WarrantyService Department and Technical Support 1 800 Contacting 3MGlossary of Terms Background Noise, effectsCombining Noise sources Crest FactorCriterion Level CL Criterion Time Decibel dBDose Exchange Rate ER also known as the Doubling RateFree field setting microphone Hearing Conservation HC Hertz HzLavg Average Level Lep,dLeq Equivalent Level LoggingMaximum Level Lmax Measurement RangePEL Permissible Exposure Level Projected TimeRandom incidence microphone Response TimeTWA Time Weighted Average ThresholdWeighting A, C, Z, etc Upper Limit ULWindscreen Measurement equations Index Running studies About 3M Personal Safety About Us

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