TTH300, TTF300 TEMPERATURE TRANSMITTER | SM/TTX300/SIL-EN REV. E 5
Mission Time Final plant operation time for the safety system. Used for the PFDAVG and Proof Test Interval calculation.
FMEDA Failure Modes, Effects and Diagnostics Analysis.
MTBF Mean Time Between Failure.
MTBF = (1 / (θ total + θ AU + θ no effect + θ no part)) + MTTR.
MTTR Mean Time to Repair.
MTTF Mean Time to Failure.
DTM Device Type Manager.
EDDL Electronic Device Description Language.
FDI Field Device Integration Technology based on EDDL.
DCS Distributed Control System.
HMI Human Machine Interface.
Multidrop HART Bus Communication Mode.
Closed coupled Short connecting lead to the temperature sensor with less than 1 m (39.37 in) in length and connecting lead laid with
mechanical protection.
Extension wire Long connecting lead to the temperature sensor with more than 1 m (39.37 in) in length or connecting lead laid without
mechanical protection.
Low stress Low vibration environment or the use of a cushioned sensor. The operation is below 67 % maximum rating according to
specification.
High stress High vibration environment. The operation is above 67 % maximum rating according to specification.
NAMUR NE43 Standardization of the signal level for the breakdown information of digital 4 to 20 mA transmitter.
RTD Resistance Temperature Detector.
TC Thermocouple sensor.
SIS Safety Instrumented System (e.g., sensors, logic solver, actuators).
LRV Lower range value (measuring range lower limit).
URV Upper range value (measuring range upper limit).
Sensor redundancy with drift
detection
Assembly with two sensors and one electronics which allows to detect sensor drift failures.
4 Associated documents
The following corresponding product documents must be taken into consideration in addition to this SIL safety manual:
Product designation Document name Document type
TTH300, TTF300 SM/TTX300SIL-EN This Safety Manual
TTH300 DS/TTH300 Data Sheet
TTH300 OI/TTH300 Operating Instruction
TTH300 CI/TTH300 Commissioning Instruction
TTF300 DS/TTF300 Data Sheet
TTF300 OI/TTF300 Operating Instruction
TTF300 CI/TTF300 Commissioning Instruction
The documents can be downloaded in the available languages from the ABB website at ‘www.abb.com/temperature’.
In addition, the user of this device is responsible for ensuring compliance with applicable legal regulations and standards.
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