Siemens FIDAMAT 6 - Suppression of Short-Term Noise Signals (Function 76)

Functions
8.6 Configuration
FIDAMAT 6
118 Operating Instructions, 01/2019, A5E00222135-04
8.6.8 Suppression of short-term noise signals (function 76)
Figure 8-51 Suppression of noise signals
With function 76, you can eliminate undesired spikes which exceed a settable threshold.
Spikes are caused by electromagnetic interferences or occasional mechanical shocks.
These faults can be suppressed by entering a "blanking time" of 0 to 5 s. The entered time
has the effect that the last measured value before the spike occurred is displayed so that the
measured result is not influenced.
Times can be entered in steps of 0.1 s.
Under
"Level in % of smallest MR" , enter the threshold value in % of the smallest measuring
range above which the noise signals are to be suppressed.
If the smallest measuring range is 1 to 100 ppm, for example, the threshold is exactly 12
ppm when 12 % is set.
In the configuration shown, the device therefore suppresses noise signals which are at least
12 ppm above the last measured value and last for ≤ 1.0 s.
Note
If a change in concentration directly follows a fault, this may be displayed after a delay.
When this function is activated, the settings of function 50 ("Electric time constants") must be
taken into
account, since these are executed first.
See also
Electric time constants (function 50) (Page 94)
Relay outputs (function 71) (Page 107)