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Setting Sensor Parameters
optoNCDT 1750
Averaging has no effect on the measuring rate or data rate in case of digital measurement value output. The
averaging numbers can also be programmed via the digital interfaces. The optoNCDT 1750 sensor is deliv-
ered with “Median 9” as factory settings, i.e. median averaging over 9 measurement values.
Depending on the type of average and the number of averaged values, different transition response times
result thereof. , see Chap. 6.4
7.5.2.2
Moving average
The definable number N for successive measurements (window width) is used to calculate the arithmetic
average M
mov
according to the following formula:
MV (k)
k=1
N
N
M =
gl
MV
Measurement value,
N
Averaging number,
k
Running index
M
gl
Averaging value respectively output value
Methods:
Each new measured value is added, and the first (oldest) value is removed from the averaging (from the
window). This produces short response times for measurement jumps.
Example: N = 4
... 0, 1, 2, 2, 1, 3
2, 2, 1, 3
4
= M (n)
gl
... 1, 2, 2, 1, 3, 4
2, 1, 3, 4
4
= M (n+1)
gl
Measurement values
Output value
Special features:
Moving average in the optoNCDT 1750 allows only potentials of 2 for N. Range of values for averaging num-
ber N is 1 / 2 / 4 / 8 ... 128.
Summary of Contents for optoNCDT 1750
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