Geokon 4415, Instruction Manual, Page: 8 / 10

4
3. TAKING READINGS
The X-axis, as shown in the figures below, measures parallel motion along the axis of the crack.
The Y-axis monitors any movement perpendicular to the break. The Z-axis measures vertical
movement along the crack.
Figure 2 - Reading Locations for Models 4415-1 & 4415-3
Figure 3 - Reading Locations for Model 4415-5
3.3.1 Taking Readings with a Dial Indicator
1) To read the Z-axis, slide the tip of the dial indicator through the hole in the
rectangular bar of the crack meter until it is resting on the surface of the three-sided
cube.
2) Press the collar of the indicator firmly against the surface of the square bar and record
the Z-axis reading.