Filter time constant – Watlow Series 97 User Manual
Page 32

Filter Time Constant
A time filter smooths an input signal by applying a first-order filter time constant to the
signal. Either the displayed value or both the displayed and control values can be filtered.
Filtering the displayed value makes it easier to monitor.
View or change the input 1 time filter with Filter Time Constant 1 [Ftr1] (Input 1 Menu).
A positive value affects only the viewed values. A negative value affects both the viewed and
control values.
Figure 5.4 — Filtered and unfiltered input signals.
Unfiltered Input Signal
Time
Temperature
Filtered Input Signal
Time
Temperature
5 . 4
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F e a t u r e s
Wa t l o w S e r i e s 9 7
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