4
Manual Supplement
00809-0200-4108, Rev AB
Rosemount 2090 Pressure Transmitter
December 2018
Rosemount 2090 Pressure Transmitter
1.
Bypass the safety function and take appropriate action to avoid a false trip.
2.
Use HART communications to retrieve any diagnostics and take appropriate action.
3.
Send a HART command to the transmitter to go to the high alarm current output and verify that the
analog current reaches that value
(1)
. See Verifying alarm level, in the
4.
Send a HART command to the transmitter to go to the low alarm current output and verify that the
analog current reaches that value
(2)
.
5.
Perform a two-point calibration check of the sensor (see Section 5: Trim the pressure signal in the
) over the full working range and verify the current output at each point.
6.
Remove the bypass and otherwise restore the normal operation.
7.
Place the Security switch in the (
) position.
1. This test for possible quiescent current related failures.
2. 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.
Note
The user determines the proof test requirements for impulse piping.
Automatic diagnostics are defined for the corrected percent DU: The tests performed internally by
the device during runtime without requiring enabling or programming by the user.
2.4
Calculation of average probability of failure on demand (PFD
AVG
)
PFDAVG calculation can be found in the FMEDA report located at:
3.0
Inspection
3.1
Product repair
The Rosemount 2090 is not repairable and must be replaced in case of failure.
All failures detected by the transmitter diagnostics or by the proof-test must be reported. Feedback can
be submitted electronically at
Emerson.com/Rosemount/SafetyWeb-Apps/Report-A-Failure.
All product repair and part replacement should be performed by qualified personnel.
3.2
Rosemount 2090 SIS reference
The Rosemount 2090must be operated in accordance to the functional and performance specifications
provided in Specifications and Reference Data in the
