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