GE DMS Go Operator's Manual page 60

Chapter 2. Instrument Setup
2.3.2f Setting the Velocity Reference Block Configuration (CONFIG-VEL. REF. BLOCK)
The copper velocity reference block comes with an engraved serial number, as well as the velocity in inch/us and m/s. (See Figure 12
below.) While the steel zero block represents the upper end of sound velocity (@ 6000 m/s), the velocity reference block represents the
lower end (@ 4700 m/s). If you are using a velocity reference block for your probe, you can enter both the velocity and coating velocity into
the DMS Go. However, this function is only necessary when the TopCOAT/Auto-V option is enabled.
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Figure 12: Engraved Velocity Reference Block
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