8.3.4 Parameters: Time constants
833
Time constants SO2
T90 within : 12.0 s
T90 outside: 3.5 s
Threshold : 3.0 %
You can use this function to set various time constants to sup‐
press noise in the measured signal. During processing of the
measured signals, these time constants reduce the noise by de‐
laying the signal. The time constant "T
90
within" is eective
within an adjustable interval whose threshold values are de‐
ned as a percentage of the smallest measuring range. The time
constant dampens small changes in signal (e.g. noise), but be‐
comes immediately ineective if a fast change in signal exceeds
a threshold. If the threshold is exceeded, the signal is dampened
by the time constant "T
90
outside" until it falls below the thresh‐
old value again. "T
90
within" then becomes eective again.
T within is
valid
T within is
valid
T outside is
valid
Upper limit
Lower limit
Measured value
Fast change in signal
t
Figure 8-5 Time constants
The following values are possible for the time constants:
• T
90
within: 0.1 to 99.9 (s)
• T
90
outside: 0.1 to 99.9 (s)
• Threshold (data in %): 0 ... 100% of smallest range
8.3.5 Parameter: Pump/LCD contrast
834
Adjust pump / flow
Adjust LCD contrast
You can use this menu to select two dialogs via which the pump
capacity and the contrast of the LCD can be changed.
Functions
8.3 Parameter
ULTRAMAT 23
132 Equipment Manual, 04/2022, A5E37100388-012
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