Laserfiche WebLink
<br />Compliance Module <br />• <br />3. COMPLIANCE MODULE <br />This chapter provides instructions to install and setup the B1aztMate 1H. <br />3.1. What is Event Monitoring? <br />• <br />Event monitoring measures both ground vibrations and air pressure. The monitor measures <br />transverse, vertical, and ]ongi[udinal ground vibrations. Transverse ground vibrations agitate <br />particles in a side to side motion. Vertical ground vibratons agitate particles in an up and down <br />motion. Longitudinal ground vibrations agitate patcles in a forward and back motion progressing <br />ou[ward from the event site. Events also affect air pressure by creating what is commonly referred <br />to as "air blast". By meazuring air pressures, we can detertttine the effect of air blast energy on <br />structures, measured on the Lineaz "L" scale, or az perceived by the human ear, measured on the <br />"A" Weight scale. <br />Air Pressure + <br />+ V <br />~ + <br />Microphone L <br />!~ <br />Standard Transducer <br />Ground Vibrations <br />V = Verliwl <br />T =Transverse <br />L =Longitudinal <br />Event <br />The arrows indicate positive and negative ground motion represented by <br />waveforms created by the BlaslMate III. <br />Q + <br />Longitudinal geophone (Lj ~ <br />N <br />LL <br />)~) <br />F i <br />Vertical geophone (V) ~ <br />5 _ <br />0 <br />a <br />0 <br />w <br />~ t <br />Transverse geophone (f) z <br />TIME <br />• Figure 3.1 How the BIasL~iate III Monitors Events. <br />BIas4VIate Hi Operator Manual <br />3-1 <br />