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Max average power:
The laser in LMI Technology’s sensors is a
pulsed type, i.e. it emits pulses of brief duration
and is shut off in between. This number indicates
the maximum laser power if the pulses are
averaged over time.
Wavelength:
There is an indication in parenthesis, which tells
whether light at this particular wavelength is
visible
Nominal Ocular
Hazard Distance
(NOHD)
See section “Safety of Laser products” in the
operator’s manual.
Emission delay:
Laser ON or Power ON delay
Bottom Part
The bottom part of the Quality Record shows a diagram, which is generated
during the linearization procedure. The target material is white paper, which is a
”neutral” material in terms of light reflection and dispersal.
The diagram shows the result from a check (on the same white paper target),
which is made after the translation table, has been installed in the sensor. The
ideal result is a perfectly flat graph on the zero line. In practice there are always a
few small deviations, because of noise from the sensor. The important thing is that
the general ”trend” of the line is horizontal, i.e. that the scale factor is correct.
The linearization as well as the linearity check is both made with the ”Selcom”
interface.
The target’s distance (in millimeters) from the sensor’s mounting surface is shown
in the diagram’s horizontal axis. On the vertical axis you can see the deviation
from linearity in sensor LSBs. The size of one LSB (least significant bit) in
millimeters is given by the sensor’s scale factor.
The scale factor that results from the check measurement is printed out explicitly
in the upper part of the diagram. In the line above that one, you can see the
Measurement Range that has been achieved, both in millimeters and as a
percentage of the nominal Measurement Range.
The upper right corner of the diagram contains the date and time when the check
was performed, the sensor type and serial number, and the name of the operator.
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