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Compliance hfadule <br />• <br />Event monitoring measures both ground vibrations and air pressure. The monitor measures <br />transverse, venical, and longitudinal ground vibrations. Transverse ground vibrations agitate <br />particles in a side to side motion. Venical ground vibrations agitate particles in an up and down <br />motion. Longitudinal ground vibrations agitate particles in a forward and back motion progressing <br />outwazd from the event site. Events also affect air pressure by creating what is commonly referred <br />to as "air blast". By measuring air pressures, we can determine the effect of air blast energy on <br />swctures, measured on the Linear "L" scale, or as perceived by the human ear, measured on the <br />"A" Weight scale. <br />Air Pressure <br />• <br />3. COMPLIANCE MODULE <br />This chapter provides instructions to install and setup the Blast,Viate III. <br />3.'I. What is Event Monitoring? <br />/1 <br />~ .- <br />'VW' <br />Event <br />Microphone <br />Standard Transducer <br />Ground Vibrations <br />V =Vertical <br />T =Transverse <br />L =Longitudinal <br />L <br />The arrows Indicate positive and negative ground motion represented by <br />waveforms created by the BlastMate III. <br />Longitudinal geophone (L) <br />Vertical geophone (V) <br />Transverse geophone (T) <br />• <br />'ieure 3.1 How the Blast}fate III Monitors Events <br /> <br />BlastMa[e II[ Operator Manual 3-1 <br />