Delta AS Series Manual page 130

A S S er i es Mo d u le Ma n ua l
Example:
A channel receives voltage inputs between -10.0 V to +10.0 V. The gain is 1000, and the offset is 0. The
corresponding value for the original signal -10.0 V to +10.0 V is -32000 to +32000. If you change the offset to
-100, the calibrated value for the original signal -10.0 V to +10.0 V becomes -31900 to +32100. When the
input voltage is 0 V, the digital value becomes -100. When the input voltage is 10.0 V, the digital value
becomes 32100.
Gain = 1000, Offset = -100
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3. Average
You can set the average value between 1–100. It is a steady value obtained from the sum of the recorded
values. If the recorded values include an acute pulse due to unavoidable external factors, however, you may
observe violent changes in the average value. Use the filtering function to exclude acute pulses from the
sum-up and equalization, so the computed average value is not affected by the acute recorded values. Set
the filter percentage to the range 0–3, where the unit is 10%. If you set the filter range to 0, the system sums
up all the recorded values and divides them to obtain the average value, but if you set the filter range to 1, for
example, the system excludes the bottom 10% and the top 10% of the values and averages only the
remaining values to get the average value. For instantance, set the average value to 100 and set the filter
percentage to 3. When there are 100 pieces of data collected, the system arranges the collected data
according to their values from large to small and then excludes the bottom 30% and top 30% of the values
(60 pieces of data) and averages only the remaining values (40 pieces of data) to obtain the average value.
5 - 1 4
10
-10V
(X1, Y1)
(0V, 100)
-10
D value
igital
Signals after the calibration
Original signals
(X2, Y2)
(10V, 32100)
10V
Voltage
Input analog v alue
(Y)
(X)