TABLE OF CONTENTSINTRODUCTION …………………………………………………………………….. 1SIMPLIFIED OPERATING INSTRUCTIONS …………………………………….. 1Turning MICRO-15 On ……………………………………………………………… 2Changing Battery …………………………………………………………………….. 2Calibration ……………………………………………………………………………… 2Pause and Run ………………………………………………………………………... 2Reading Data …………………………………………………………………………. 2Displayed Data ……………………………………………………………………….. 2ON/OFF Mode ……………………………………………………………………….. 3Reset Mode ……………………………………………………………………………. 4Print ……………………………………………………………………………………. 4GENERAL DESCRIPTION ………………………………………………………….. 4SPECIFICATIONS ……………………………………………………………………. 6PRINCIPLES OF OPERATION …………………………………………………….. 6General ……………………………………………………………………………….. 6Weighting Characteristics ………………………………………………………….. 8Microphone Characteristics ………………………………………………………… 8Internal Electrical Noise …………………………………………………………….. 8Microcomputer Modes ………………………………………………………………. 9Formulas and Definitions …………………………………………………………… 10Key Functions ………………………………………………………………………... 12Controls ………………………………………………………………………………. 13Printer Output ……………………………………………………………………….. 13TESTING AND CALIBRATION …………………………………………………….. 14Battery Test …………………………………………………………………………. 14Battery Replacement ……………………………………………………………….. 15Calibration and Maintenance ………………………………………………………. 15Daily Calibration ……………………………………………………………………… 15OPERATING PROCEDURE ……………………………………………………….. 16Effects of Operator's Presence ……………………………………………………. 17Use with Windscreen ………………………………………………………………. 18Determining Function Parameter Settings ……………………………………….. 19Code Setup Procedures ……………………………………………………………. 22INTERPRETING RESULTS ……………………………………………………….. 23Use of L-AVG and TWA …………………………………………………………… 24Estimating TWA from L-AVG ……………………………………………………… 25Accuracy of Readings ……………………………………………………………… 25Hints and Good Practices ………………………………………………………….. 25Considerations of Measurement and Accuracy …………………………………. 27ACCESSORIES …………………………………………………………………… 28QUEST SERVICE AND WARRANTY POLICY ………………………………… 29