Averaging; Automatic Zero Mode - Festo SOEL-RTD-Q50-PP-S-7L Instructions De Service Et De Montage

SOEL-

Averaging

The measuring result (output signal) is smoothed by averaging. The measured values are read continuously into a memory
and the arithmetical mean is formed. Functions 14 and 15 (page 29) determine the number of measurements (10 or 100) to
be used for averaging.
With a scanning rate of 0.4 ms per measurement, the response time lies between 0.4 ms (without averaging) and 40 ms.
Example of use: When measuring rough surfaces, it is possible to counter-balance fluctuations in measured values.
Response time
0.4 ms = measured value (no average)
4 ms = averaging with 10 measured values
40 ms = averaging with 100 measured values

Automatic zero mode

The output characteristic curve 4 – 20 mA is displaced with this function. When the automatic zero mode is activated and Q
= +U , the current measured value is equated with the output value of 0% = 4 mA. The incline of the characteristic curve is
B
maintained and the minimum and maximum values of the characteristic curve are limited by the measuring range.
The distance to the object must be within the measuring range.
Analogue signal
100% (20 mA)
50% (12 mA)
0% (4 mA)
+U
B
Q
1
-U
B
Illustr. 11
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Festo SOEL-...0608b English
I(mA)
Illustr. 10 Output characteristics in relation to arithmetical mean
15500273
100% (20 mA)
0% (4 mA)
t(s)
Illustr. 12
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Direction of movement
Response time t(s)
80 150
Measuring object
1
Factory setting
Autom. zero at 150 mm
mm
300
31