Analog Measurement Performance; Interpretation Of The Characteristic Curves - Baumer OM20 IO-Link Operating Manual

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3.5

Analog measurement performance

The sensor's analog output features 12-bit resolution. Such resolution may limit the precision of
the analog current or voltage values. For this reason, the analog measuring field should be re-
stricted to the measuring range relevant for the application. This can be done via the teach but-
ton or the IO-Link interface.
INFO
For all laser distance sensors, the precision decreases with increasing measuring distance. For
this reason, the resolution of the analog output limits the repeatability of the analog measure-
ment results, especially at close range.
a) To achieve the highest possible precision, measure in the close range of the sensor and
limit the analog measuring field to as small an area as possible.
Also see about this
2 Analog measurement field [} 36]
2 Teach button [} 11]
3.5.1

Interpretation of the characteristic curves

The diagrams in the appendix of this documentation show how the resolution of the analog out-
put limits the precision of the measurement.
Example
In this example, the repeatability of the sensor is specified as 1 µm at the beginning of the mea-
suring range to 3 µm at the end of the measuring range. This precision can be achieved at the
analog output by narrowing the analog measuring field to 3 mm.
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