Specifications - Emerson Rosemount 248 Reference Manual

Safety Instrumented Systems (SIS) Requirements
May 2019
Product Repair
The Rosemount 248 Transmitter is repairable by major component replacement.
All failures detected by the transmitter diagnositcs or by the proof-test must be reported.
Feedback can be submitted electronically at
5.6

Specifications

The Rosemount 248 Transmitter must be operated according to the functional and
performance specifications provided in the Rosemount
5.6.1 Failure rate data
The FMEDA report includes failure rates and independent information on generic sensor
models. The report is available at
5.6.2 Failure values
Safety accuracy (defines what FMEDA considers to be a dangerous deviation from a
correct measurement):
• When the span > = 100 °C, the safety accuracy is ± 2% of process variable span
• When the span < 100 °C, the safety accuracy ± 2 °C
Safety response time: 5 seconds
Self-diagnostics test interval: At least once every 60 minutes
5.6.3 Product life
50 years – based on worst case component wear-out mechanisms – not based on wear-
out of process sensors.
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248 Product Data Sheet
Rosemount 248 Temperature Transmitter
Rosemount 248 Temperature Transmitter Reference Manual
Reference Manual
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