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Proton Products SL mini and SLR mini Series Speed and Length Gauges Instruction Manual - issue 1s
MECHANICAL INSTALLATION
Stand-off distance and depth-of-field
For best accuracy, locate the measured object at the specified stand-off distance to the
gauge.
Speed and length measurement is possible for objects located away from the specified stand-
off distance but still within the depth-of-field; however the measurement accuracy may be
degraded by the reduced signal strength.