Appendix Proline Prosonic Flow P 500 HART
42 Endress+Hauser
The common cause factors β and β
D
indicated below are minimum values for the device. These
must be used when designing the sensor subsystem:
• Minimum value β for homogeneously redundant use: 2 %
• Minimum value β
D
for homogeneously redundant use: 1 %
The device meets the requirements for SIL 3 in homogeneously redundant applications.
If two sensors with an identical design (same type and same nominal diameter) are directly
connected to one another flange-to-flange, mutual acoustic interference cannot be entirely
ruled out. To fully rule out potential interference, it is recommended to install the sensors at
different points of the pipe or to insert a spacer between the two sensors. The spacer must be
at least half as long as the sensor.
NOTICE
Note the following if a fault is detected in one of the redundantly operated devices
during the proof test:
‣
Check the other devices to see if the same fault occurs there.
7.4 Version history
Version changes Valid as of firmware version
FY02647D/06/xx/01.21 First version 01.01.zz (HART; from delivery date May 10, 2021)
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