Olympus EPOCH 1000 Series - Calibrating to Known Depth Values with an Angle Beam Transducer; Figure 9-20 the Ref Gain with Indication

910-269-EN, Rev. B, June 2011
162 Chapter 9
Figure 9-20 The Ref gain with indication
9.8 Calibrating to Known Depth Values with an Angle Beam
Transducer
The EPOCH 1000 Series allows you to perform distance calibration with an angle
beam transducer based on the known depth of equal sized reflectors (usually side-
drilled holes) instead of known sound paths. The following sample angle beam
calibration details the procedure for the depth calibration.
As with any angle beam calibration, you must also verify the beam index point (BIP),
refracted angle, and perform a sensitivity calibration. It is of particular importance to
verify the refracted angle before performing a distance calibration. The acquired
depth measurement(s) used in this mode of calibration are based on calculations from
the sound path of the reflector (direct measurement) and the value of the manually
entered angle parameter. If the angle value is not correct, the distance calibration in
depth mode will not be accurate.
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