Functional Principle, Technical Data; Functional Principle; Functions; Fitting The Measurement Range - MICRO-EPSILON ILD1402-5 Instruction Manual

Functional Principle, Technical Data

3.
3.1
The sensor uses the principle of optical triangula-
tion, i.e. a visible, modulated point of light is pro-
jected onto the target surface.
The diffuse element of the reflection of the light spot
is imaged by a receiver optical element positioned
at a certain angle to the optical axis of the laser
beam onto a high-sensitivity resolution element
(CCD), in dependency on distance.
The controller calculates the measured value from
the CCD-array. An internal closed-loop control
enables the sensor to measure against different
surfaces.
A LED on the sensor indicates:
-
-
-
SMR = Start of measuring range | MR = Midrange | EMR = End of measuring range
3.2
3.2.1
The analog measuring range can be reduced with aid of the "Teach" function, see Chap. 6.2. This enables
you to scale only a part of the measuring range to the full scale current output. Thus the resolution of analog
evaluation systems like displays or PLCs will be used better.
optoNCDT 1402
Functional Principle, Technical Data

Functional Principle

In range
Out of Range (upper and lower range values),
poor target (unfit or no object)
Mid range

Functions

Fitting the Measurement Range

teach in laser on
state
optoNCDT
LASER RADIATION
Do not stare into the beam
CLASS 2 LASER PRODUCT
IEC 60825-1: 2007
=670 nm
Current
output
3.75 mA
4 mA (SMR)
12 mA (MR)
20 mA (EMR)
3.75 mA
Fig. 2: Definiton of terms, output signal
Digital
value
16372
161
8184
16207
16374
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