Operation
5.11 Configuration
FIDAMAT 6-G
5-52
Operating instructions, 07/2006, A5E00478463
5.11.9
Suppression of short-term noise signals (function 76)
76 Suppress fault.. THC
Suppress noise signals
with a duration of up to
: 1.O: s
Level in % of
smallest MR: 12.O %
Figure 5-55 Suppressing noise signals
With function 76, you can eliminate undesired spikes which exceed a adjustable threshold.
Spikes are caused by electromagnetic stray pick-up or occasional mechanical impacts.
These faults can be suppressed by inputting a "hiding time" of 0 to 5 s. The time input 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 input in steps of 0.1 s.
Under
"Threshold in % of smallest MR" , enter the threshold value in % of the smallest
measuring range, after which the noise signals are to be suppressed.
If the smallest measuring range lies at 1 to 100 ppm, for example, the threshold is exactly 12
ppm when 12 % is set.
In the configuration shown, the device suppresses noise signals, which are at least 12 ppm
above the last measured value and last ≤ 1.0 s.
Note
If a concentration change 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 5-27)
Relay allocation (function 71) (Page 5-40)