Heath-consultants Aqua-Scop Bedienungsanleitung PDF herunterladen (Seite 30)

This gives two simultaneous equations:

IA XA - IB XB = O

XA + XB = X

O -IB

X 1 IBX

XA = ———— = ——————

IA -IB IA + IB

1 1

A O

1 X IAX

XB = ———— = ———————

IA -IB IA + IB

1 1

Example: Making contact measurements using the Magnet Attachment, we

check two hydrants separated by a distance of 70 yards. At hydrant A we

read .30 units and at hydrant B we read .90 units. We plot this graphically

by rst laying off the X-axis as the total distance between hydrants, or

70 yards. We now mark off the value of intensity for hydrant A along the

positive Y-axis. LABEL THIS POINT B. At distance X from the origin,

draw a perpendicular. Starting at X and moving in the negative Y direction,

lay off the value of intensity for hydrant B. LABEL THIS POINT A. Draw

a straight line from point B to point A. Where this line intersects the X axis

is the point of leakage. Note the inversion of points A and B.

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Heath-consultants Aqua-Scop Bedienungsanleitung Seite 30