Proton SL mini 1220 - MECHANICAL INSTALLATION; Stand-off distance and depth-of-field

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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.
Model
Stand-off distance / mm
Depth-of-field / mm
SL mini 1220
SLR mini 1220
120
20
SL mini 3060
SLR mini 3060
300
60
Stand-off distance
Depth-of-field
Ideal object location