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Reference Manual
00809-0100-4530, Rev BA
July 2009
8-3
Rosemount 5300 Series
OVERVIEW The following section applies to the 4-20 mA Rosemount 5300 Prior-Use
option (Special certification: QS) transmitter used in Safety Instrumented
Systems (SIS) applications. The 5300 Prior-Use option with analog output
provides overfill and empty tank protection to improve the system safety. The
transmitter is classified as a Type B device. It contains self-diagnostics and is
programmed to send its output to either a high or low failure state upon
internal detection of a failure.
An independent FMEDA (hardware assessment) was conducted by Exida
according to IEC 61508. The FMEDA is performed to determine failure rates,
calculate the Safe Failure Fraction (SFF), and the average Probability of
Failure on Demand (PFD
AVG
). The hardware assessment is one of the steps
taken to achieve functional safety per IEC 61508.
NOTE:
Refer to the 5300 FMEDA
(1)
report for failure rate data, assessment details,
and assumptions regarding failure rate analysis.
Applicable Models Table 8-1 lists the versions of the Rosemount 5300 Series transmitter that
have been considered for the hardware assessment, to which this section
applies.
Table 8-1. Rosemount 5300
Series Prior-Use Option Model
Codes
To identify a 5300 Prior-Use option transmitter:
• Verify the option code QS in the model code, on the label affixed to the
outside of the transmitter head or
• 375 Field Communicator: HART Sequence [1, 7, 8]. Verify that
Prior-Use safety device is ON
• Open Rosemount Radar Master, right click on the device, and select
properties. Verify that the Safety Device (QS Option) is present
Skill Level of Personnel It is assumed that the personnel installing, configuring, and operating the
system have the knowledge equal or greater than that of a qualified
Instrument Technician familiar with safety-related systems, process control
applications and general instrument use.
(1) The 5300 FMEDA report is accessible at
www.emersonprocess.com/rosemount/safety/PriorUse.htm.
Prior-Use Option Model Codes
1 Model 5301HxxxxxxxxxxxxxxQS
2 Model 5302HxxxxxxxxxxxxxxQS
3 Model 5303HxxxxxxxxxxxxxxQS
Safety Device (QS Option)