Emerson Rosemount 5408 Reference Manual page 160

Safety Instrumented Systems (SIS) requirements
February 2020
3. Simulate 4.00 mA output and verify loop current.
4. Simulate 20.00 mA output and verify loop current.
5. Perform a two-point level measurement verification of the transmitter in the
6. Remove the bypass and otherwise restore normal operation.
160
a) Select Service Tools → Simulate.
b) Under Analog Out, select Loop test.
c) Select 4mA and then select Next (Enter on Field Communicator).
d) Measure loop current (e.g. reading the safety logic solver or using the TEST
terminal, see Use the TEST
e) Verify the current deviation is within the safety deviation of 2% (±0.32 mA).
Note
The inaccuracy of safety logic solver or current meter needs to be
considered.
f) To end loop test, select Cancel (ABORT on Field Communicator).
a) Select Service Tools → Simulate.
b) Under Analog Out, select Loop test.
c) Select 20mA and then select Next (Enter on Field Communicator).
d) Measure loop current (e.g. reading the safety logic solver or using the TEST
terminal, see Use the TEST
e) Verify the current deviation is within the safety deviation of 2% (±0.32 mA).
Note
The inaccuracy of safety logic solver or current meter needs to be
considered.
f) To end loop test, select Cancel (ABORT on Field Communicator).
measuring range. Compare with independent measurement (e.g. the BPCS level
sensor).
a) Select Service Tools → Variables → Process.
b) Verify the current level or distance reading with an independent
measurement is within the safety deviation of 2%.
Note
The inaccuracy of the independent measurement needs to be considered.
c) Move the surface in the tank at least 10% of the full measuring span (level
0-100%).
d) Repeat steps (a) to (b) for the second point.
terminal).
terminal).
Reference Manual
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Reference Manual