Maintenance
FLOWSIC600-XT · Operating Instructions · 8018846/1BHP/V2-1/2021-05 · © SICK Engineering GmbH 99
Subject to change without notice
Fig. 48 SOS Calculator
5 Compare the theoretical speed of sound with the speed of sound measured with the
FLOWSIC600-XT.
The deviation of the measured SOS from the calculated SOS is shown for each path in
the “Deviations per Path” area, → Fig. 49.
Fig. 49 Speed of sound (SOS)
6 The deviation between the two speeds of sound should be less than ±0.1%.
If the deviation exceeds 0.3%: Check the plausibility of the pressure, temperature and
gas composition values.