Proline Promass 500
Appendix
Hauser
49
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.
8.4
Version history
Version
Changes
Valid as of firmware version
SD01729D/06/xx/08.20 Addition, Device Model A1/A2 & option
CC (4 to 20mA HART Ex-i active)
01.05.zz (HART; from delivery date September
16, 2019)
SD01729D/06/xx/05.18 Proof test modified.
01.01.zz (HART; from delivery date October 1,
2017)
SD01729D/06/xx/04.18 Amendment concerning 8A5C (new
sensor generation A)
01.01.zz (HART; from delivery date October 1,
2017)
SD01729D/06/xx/02.17 Changes: Operating Instructions for the
01.01.zz (HART; from delivery date October 1,
2017)
SD01729D/06/xx/01.16 First version
01.00.zz (HART; from delivery date August 2,
2016)
Summary of Contents for HART Proline Promass 500
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