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9.3 Velocity Null Adjustment
The AOM can be provided with an optional velocity output. For those units, velocity zero and span
adjustments are provided. The velocity zero and velocity span adjustments are factory set and should not
require readjustment. A velocity output signal of 0 (zero) volts represents a static displacement (no
motion). A velocity output of 10 volts represents a dynamic displacement or a customer-specified maxi-
mum velocity (maximum velocity must be specified at time of order). The direction of motion is indicated
by the polarity of the velocity signal; a positive output signal typically indicates that the permanent mag-
net is moving away from the transducer head (unless otherwise specified for this system). A negative out-
put signal typically indicates that the permanent magnet is moving towards the transducer head.
Figure 9-2
Velocity Adjustments on the AOM
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