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LaserSpeed 8000-3 Instruction Handbook
LaserTrak Software
Part No. 93463 / Drawing No. 0921-01561 Page 109 of 221 Revision A (Sep 2007)
Standard Operating Parameters
Material Present Input
Mode
Controls how the gauge determines Material Present. The sensor can use
either the amount of reflected laser light (Internal), or it can use an external
input signal (Active Low/Active High).
Material Present
Dropout Time
Sets the time that Material Present can be lost before the sensor triggers the
end of a measurement. If you are taking measurements and the Material
Present signal is lost for less than the selected Material Present dropout time,
the loss is considered to be a momentary loss of signal and is ignored. If the
signal is lost for longer than the selected Material Present dropout time, it is
considered the end of the material. This function is very useful when making
length measurements on poor reflecting material.
Material Present
Validation Time Limit
Sets the maximum time that can elapse between the detection of Material
Present and the acquisition of valid velocity readings. If the acquisition of valid
velocity readings exceeds this time limit the gauge will consider the length
measurement to be invalid and output 999999.999 as a length.
Material Present
Threshold
A value from 0 to 4095 that indicates the relative reflected laser light threshold
level of the Material Present signal. A setting of 0 would take very little
reflected light to trigger Material Present. A setting of 4096 will take a lot of
light on the detector to trigger MP. A good starting place is in the center of the
range. This setting is only applicable when the Material Present Input Mode is
set to Internal.
Walking Threshold The velocity value below which, the output is forced to zero regardless of
whether or not valid readings are obtained. This setting is useful for eliminating
accumulation of length when the material is vibrating while stationary in the
measurement zone. Setting this value to 0 disables the setting. The range is 0
to 2000
Minimum Final Length When in Final Length mode, sets the minimum length that will be reported.
This is useful for ignoring momentary glitches in Material Present caused by
outside disturbances such as water droplets or spray passing through the
measurement area. Any measured length less than this setting will not be
reported as a Final Length. The range is 0 to 999,999.999.
Index Pulse Length Sets the Index pulse length in 10 ms increments. The range is from 10ms to 2
seconds.
Index Pulse Every Sets the distance between index pulses in the selected measurement units.
The range is 0.1 and 2000
High Speed Pulse Rate Sets the number of pulses per unit length for the high speed pulse output. The
unit length can be configured by setting the Units of Measurement setting. The
gauge is capable of transmitting pulse rates as high as 5MHz on this pulse
output. Select a Pulse Rate setting that will produce a frequency lower than
5MHz at the maximum expected line speed. The range is 0.001 to 100,000.
Low Speed Pulse Rate Sets the number of pulses per unit length for the adjustable voltage pulse
output. The unit length can be configured by setting the Units of Measurement
setting. The sensor is capable of transmitting pulse rates as high as 250kHz
on this pulse output. Select a Pulse Rate setting that will produce a pulse rate
lower than 250kHz at the maximum expected line speed.
For example, if the maximum line speed was 1000 m/min, a setting of 10,000
pulses/meter would produce an output frequency of about 167kHz. (1000