Emerson Rosemount 644 with HART Protocol User Manual

85
Reference Manual
00809-0200-4728, Rev SA
Safety Instrumented Systems (SIS) Certification
July 2018
Safety Instrumented Systems (SIS) Certification
7.5.5 Inspection
Visual inspection
Not required.
Special tools
Not required.
Product repair
The Rosemount 644 is repairable by replacement only.
All failures detected by the transmitter diagnostics or by the proof-test must be reported. Feedback can
be submitted electronically at Emerson.com/Rosemount/Contact-Us
.
7.6 Specifications
The Rosemount 644 Transmitter must be operated in accordance to the functional and performance
specifications provided in the Rosemount 644 Product Data Sheet
.
7.6.1 Failure rate data
The report is available at the Rosemount 644 Temperature Transmitter product page.
7.6.2 Failure values
Safety Deviation (defines what is dangerous in a FMEDA):
 Span ≥ 100 °C ± 2% of process variable span
 Span < 100 °C ± 2 °C
Safety response time: five seconds
7.6.3 Product life
50 years - based on worst case component wear-out mechanisms — not based on wear-out of process
sensors.
Report any safety related product information at Emerson.com/Rosemount/Contact-Us
.

Emerson Rosemount 644 with HART Protocol Specifications

General

Brand	Emerson
Model	Rosemount 644 with HART Protocol
Category	Transmitter
Language	English