46 FLOWSIC100 · Operating Instructions · 8012513/YSA5/V2-1/2016-07 · © SICK Engineering GmbH
Product Description
Subject to change without notice
2.4.3 Damping time
The damping time is the time taken by the measuring device to reach 90% of the end value
after a sudden change in the measured value (
Fig. 25).
The damping time can be set to any value in the range 1...300 s. Setting a higher damping
time (typically: 60...90 s) provides better attenuation of transient fluctuations in the
measured value and interference to produce a "smoother" output signal.
A special damping time is used to measure the gas flow rate and gas temperature. The
damping time of the volume flow is identical to that of the gas flow rate.
Fig. 25 Damping time
Recommended value: 60 ... 90 s
10 20 30 40 50 60 70 80 90 100
100
98
96
94
92
90
88
86
84
Measured value
in %
90% of the peak
Measured value with damping time
Process change
t in s
Damping time
The damping time should be regarded as a guide value. If the signal quality
of the ultrasonic pulses is poor, the FLOWSIC100 requires more measured
values to produce an output signal of the same accuracy. As a result, the
damping time is higher, within certain limits, than the set time.
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