Mantracourt DSCUSB User Manual page 16

When a step change occurs which does not exceed Filter Level, the new filtered value is calculated as follows:
New Filter Output value = Current Filter Output Value + ((Input Value - Current Filter Output Value) / Filter
Steps)
The time taken to reach 63% of a step change input (which is less than Filter Level) is dependant on the frequency
at which values are passed to the dynamic filter, set in Measurement Rate, multiplied by Filter Steps.
The table below gives an indication of the response to a step input which is less than Filter Level.
% Of Final Value
63%
99%
99.9%
For example, If Measurement Rate is set to 100Hz = 0.01s and Filter Steps is set to 30 then the time taken to reach
a % of step change value is as follows.
% Of Final Value
63%
99%
99.9%
15 Mantracourt Electronics Limited - DSCUSB Standard Manual
Time To settle
Measurement Rate * Filter Steps
Measurement Rate * Filter Steps * 5
Measurement Rate * Filter Steps * 7
Time To settle
0.01 x 30 = 0.3 seconds
0.01 x 30 x 5 = 1.5 seconds
0.01 x 30 x 7 = 2.1 seconds