Sis Operation And Maintenance - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4107
Rosemount alarm level
A. Transmitter failure, hardware or software alarm in LO position.
B. Transmitter failure, hardware or software alarm in HI position.
7.4

SIS operation and maintenance

7.4.1 Proof test
The following proof tests are recommended. In the event that an error is found in the
safety and functionality, proof test results and corrective actions taken can be
documented at Emerson.com/Rosemount/Safety. All proof test procedures must be
carried out by qualified personnel.
Use Field communicator Fast Keys
trim. Security switch should be in unlocked ( ) position during proof test execution and
repositioned in locked ( ) position after execution.
7.4.2 Simple proof test
The simple suggested proof test consists of a power cycle plus reasonability checks of the
transmitter output. Reference the
device.
Required tools: Field Communicator and mA meter.
Procedure
1. Bypass the safety function and take appropriate action to avoid a false trip.
2. Use HART
3. Send a HART command to the transmitter to go to the high alarm current output
4. Send a HART command to the transmitter to go to the low alarm current output
5. Remove the bypass and otherwise restore the normal operation.
6. Place the Security switch in locked ( ) position.
7.4.3 Comprehensive proof test
The comprehensive proof test consists of performing the same steps as the simple
suggested proof test but with a two point calibration of the pressure sensor in place of the
reasonability check. Reference the
device.
Required tools: Field Communicator and pressure calibration equipment.
(2) This tests for possible quiescent current related failures.
Reference Manual
®
communications to retrieve any diagnostics and take appropriate
action.
and verify that the analog current reaches that value
and verify that the analog current reaches that value
Safety Instrumented Systems Requirements
to perform a loop test, analog output trim, or sensor
FMEDA Report for percent of possible DU failures in the
FMEDA Report for percent of possible DU failures in the
September 2020
(2)
. See Verifying alarm level.
(2)
.
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