Watlow Series 982 - Manual (Page 124)

9.10 WATLOW Series 982 User’s Manual
Software Features, Chapter 9
Software
Input Filter
Overview
In certain applications the process being measured can be unstable, which
makes it difficult to control and also makes the constantly changing dis-
play difficult to read. The Series 982 input filter can solve these problems
by smoothing out just the display or the display and the input signal.
You can set a time constant in seconds for a low-pass filter that will, if you
select a positive value, affect the display only. Select a negative value to fil-
ter the input signal itself. Use this feature with caution, because a large
time constant could hide system upsets.
Requirements
This feature is standard on all Series 982 controllers.