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8.6.5
Alarm and saturation levels
DCS or safety logic solver should be configured to handle both High alarm and Low alarm.
In addition, the transmitter must be configured for High or Low alarm (see
identifies the alarm levels available and their operation values
Figure 8-3: Alarm Levels and Operation Values
A
B
3.9 mA
(3)
4 mA
20 mA
21.75 mA
(2)
3.75 mA
(1)
20.8 mA
(4)
C
B
3.8 mA
(3)
4 mA
20 mA
22.5 mA
(2)
3.6 mA
(1)
20.5 mA
(4)
A. Rosemount Alarm Level
B. Normal Operation
C. Namur Alarm Level
1.
Transmitter Failure, hardware or software alarm in Low position.
2.
Transmitter Failure, hardware or software alarm in High position.
3.
Low saturation
4.
High saturation
8.7
Site acceptance
After installation and/or configuration, proper operation of the transmitter (including
verification of all configuration changes) must be verified. A site acceptance test is
therefore recommended. The proof-tests outlined in
(4)
Note that during startup, the Rosemount 5408:SIS always outputs Low alarm current even if the transmitter is configured
for High alarm mode.
Safety Instrumented Systems (SIS) requirements
Reference Manual
February 2020
00809-0100-4408
154
Reference Manual
Summary of Contents for Rosemount 5408
Page 4: ...4 ...
Page 8: ...Contents Reference Manual February 2020 00809 0100 4408 viii Reference Manual ...
Page 10: ...Introduction Reference Manual February 2020 00809 0100 4408 10 Reference Manual ...
Page 20: ...Transmitter overview Reference Manual February 2020 00809 0100 4408 20 Reference Manual ...
Page 72: ...Mechanical installation Reference Manual February 2020 00809 0100 4408 72 Reference Manual ...
Page 100: ...Operation Reference Manual February 2020 00809 0100 4408 100 Reference Manual ...
Page 240: ...Product certifications Reference Manual February 2020 00809 0100 4408 240 Reference Manual ...
Page 242: ...Product certifications Reference Manual February 2020 00809 0100 4408 242 Reference Manual ...
Page 244: ...Product certifications Reference Manual February 2020 00809 0100 4408 244 Reference Manual ...
Page 246: ...Product certifications Reference Manual February 2020 00809 0100 4408 246 Reference Manual ...
Page 248: ...Product certifications Reference Manual February 2020 00809 0100 4408 248 Reference Manual ...