Emerson Rosemount 3051 Reference Manual page 120

Safety Instrumented Systems (SIS) requirements
August 2019
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 the Lock 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 FMEDA Report for percent of possible DU failures in the
device.
Prerequisites
Required tools:
• Field Communicator
• Pressure calibration equipment
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. Perform a two-point calibration of the sensor over the full working range and verify
6. Remove the bypass and otherwise restore the normal operation.
7. Place the Security switch in the Lock position.
(4) This tests for possible quiescent current related failures.
(5) This tests for compliance voltage problems, such as a low loop power supply voltage or increased wiring distance. This also
tests for other possible failures.
120
See Verifying alarm level.
and verify that the analog current reaches that value.
®
communication to retrieve any diagnostics and take appropriate action.
and verify that the analog current reaches that value.
See Verifying alarm level.
and verify that the analog current reaches that value.
the current output at each point.
See Trim the pressure signal.
Note
• You determine the proof test requirements for impulse piping.
• Automatic diagnostics are defined for the corrected % DU. The device performs
these tests internally during runtime without requiring you to enable or program
the transmitter.
Reference Manual
00809-0100-4007
(4)
(4)
(5)
Rosemount 3051