2-38.4 Change 1
(a) With the transducer positioned from the SET UP procedure, adjust the
gain setting to achieve a signal 80% of full screen height (FSH) from the
lower OD EDM notch. Reference Figure 2 below.
Figure 2. Lower OD EDM notch
(b) Rotate the POSITIONER off of the lower OD EDM notch. Slowly rotate
the transducer to minimize base line noise. Review Figures 2 and 3.
When the base line noise is minimized, carefully tighten the set screw.
Figure 3. Base line noise reduction
(c) Locate the POSITIONER over the upper OD EDM notch and adjust the
gain setting to achieve a signal 60 % FSH. Reference Figure 4.
Figure 4. Upper OD EDM notch