Circutor DHB-402, Instruction Manual

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4�4�- OPEN COLLECTOR OUTPUT, OC (DHB-424 model)
The DHB-424 unit has an NPN-type open collector output, terminals 27 and 28 of
Table 3
, indicating an
over-range for the measurement. See
“5.- TECHNICAL FEATURES”
4�5�- REGRESSION OF NON-LINEAR EQUATIONS
Normally, an instrument's measurement is given by the equation for a line; in other words, there are
two pairs of points that provide the measurement.
However, it may be the case that two points are not sufficient to adjust the signal's operation.
For this reason, the DHB-4xx can work with non-linear equations with up to a maximum of 20 points
(
Figure 8
)
�
X1
Y1
Y7
Y8
Y9
Y10
Y6
Y5
Y4
Y3
Y2
X2 X3 X4 X5 X6 X7 X8 X9 X10
Measured values
Expected values
Input function
Linearised function
Figure 8:Regression of non-linear equations�
Once the number of points with which the function will be linearised has been selected (the number of
functions is one fewer than the number of points), program the consecutive points by giving them the
measured values (Xi) and the values expected to correspond to them (Yi) (0 < i < n).
While the function is being estimated, keep in mind that with non-linear functions, the more linear
segments there are, the less error there will be in terms of the linearisation.
If the measured values are less than
X1
, then it will rescale, based on the first line calculated at points
(X1, Y1) and (X2, Y2).
Values above Xn (where n < 22- the last measured value), will display a calculated value based on the
last configured linear function.
See section “
4.7.2 REGRESSION OF NON-LINEAR EQUATIONS.
” for configurations of non-linear equations
13
Instruction Manual
DHB-402 DHB-424