Baumer OX100 - Temporal Filter Setting; Processing an Invalid Measured Value

Baumer Web interface operation | 9
V2 | OX100 Operating Manual 57
9.3.3 Temporal Filter setting
With the Temporal Filter function, the noise can be reduced and thus the resolution and re-
peatability increased. The response and drop-off times are increased and moving objects de-
tected less precisely as a result. The precision filter calculates the results in the form of floating
values. The oldest measured value is removed as soon as a new measurement is added.
Therefore the measuring frequency is not affected by the precision filter.
To set the Temporal Filter function, proceed as follows:
Instruction:
a) Select mode Parametrization | Measurement Tools Parametrization in the menu.
b) In the Measurement Tools window, go to the desired measurement tool and select Tempo-
ral Filter.
c) Set the Temporal Filter function.
You can set the following filters:
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Average:
This filter calculates the average value of an array. You can set the length of the filter.
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Median:
This filter calculates the median via a configurable number of measured values that are in a
time sequence (sample). The median is defined as the value below which 50% of the mea-
sured values in the sample are located. The median filter can be used to suppress individual
outliers. With greater filter lengths, the filter can also suppress several successive outliers.
Example: Calculating the response time with a measurement frequency of 500 Hz
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Formula:
▪ Response time = 1 / measurement frequency × (median + average)
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Sample values:
▪ Measurement frequency: 500 Hz
▪ Median = 4
▪ Average = 16
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Calculation:
▪ Response time = 1/500 Hz × (4 + 16) = 0.04 s = 40 ms
9.3.4 Processing an invalid measured value
The Invalid Value Handling function allows for defining the output holding time of a measured
value in the event it is followed by invalid measured values. This way, sudden but expected sig-
nal interruptions are compensated. Each measuring tool can be set independently.
To configure the processing of invalid measured values, proceed as follows:
Instruction:
a) Select mode Parametrization | Measurement Tools Parametrization in the menu.
b) In the Measurement Tools window, go to the desired measurement tool and select Invalid
Value Handling.
c) Enter the desired holding time for the invalid measured value.