Fluke Biomedical 84-340 - Manual (Page 6)

Nuclear Associates 84-340
Operators Manual
1-2
Figure 1-1
Lateral Resolution Targets
Two sets of targets are positioned at 2.5 cm and 10 cm deep to allow testing of both short and long
distance transducers. Extremely fine monofilament wires with a diameter of .1 mm are used to avoid any
possibility of one wire acoustically shadowing another. Five parallel wires are horizontally spaced
precisely 5, 4, 3, 2, and 1 mm distances apart from center to center (see Figures 1-2 and 1-4).
Figure 1-2
Vertical Resolution Target
The target consists of six pairs of parallel, .1 mm wires, horizontally spaced 6 mm apart from center to
center. The lower wire in each pair is horizontally offset from the upper wire by 1 mm to further reduce
any acoustic shadowing affects. The vertical distance between each pair of wires is 5, 4, 3, 2, 1, and .5
mm from center to center (see Figures 1-3 and 1-4). This target is designed to accurately assess vertical
resolution capabilities at a depth of 3 cm.