Functions
6.6 [2.07] Settings > Noise suppression
Operating with the Local User Interface
Operating Manual, 06/2017, A5E31930478-05
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4. Specify time constants:
Note
Effectiveness of time constants
The first time constant "T90 within" acts within the effective interval and dampens small
changes in measured valu
e. If the change of the measured value exceeds the effective
interval, the time constant becomes ineffective. The measured value is then dampened
by the second time constant "T90 outside".
– "Time constant within" parameter field:
Enter the time in which the signal has reached 90% following application of a jump
signal.
– "Time constant outside" parameter field:
Enter the time after which the signal exceeds 90% following application of a jump
signal.
5. Activate suppression of brief noise signals: "Noise signal suppression" parameter field
If you activate this parameter, undesirable spikes can be suppressed.
6. Assign noise threshold: "Threshold" parameter field.
– If the signal value exceeds the set value, an undesirable spike is present.
– Enter the parameter value as a percentage of the smallest physical span in the
"Threshold" text box.
Make sure that the entered value is greater than the interval of the low pass filter.
7. Enter the suppression time: "Duration" parameter field.
– By setting the suppression time, you define how long the signal value of a spike is
suppressed.
– In addition, the last measured value prior to the occurrence of a spike is output. This
way the measurement result remains constant for the set duration.
The resolution of the setting range is 0.1 s. The minimum duration that can be set is
0.2 s.
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