Dunham & Morrow DML2000-XR Manuel de l'utilisateur - Page 10

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Frequency peaking occurs over any discontinuity:

•

pipe joint

•

service connection

•

elbow

•

valve box

•

meter

Most concrete septic tanks have a cover with two handles. The handles are inverted, U-shaped

pieces of rebar that are highly magnetic. In most cases, the audio output of the DML2000-XR

will reach its peak directly over the handles, which makes it easy for the operator to identify the

Figure 7: Service Connections & Valve Boxes

Figure 8: Septic Tank