List of abbreviations
Safety Manual
Operating Instructions, 06/2012, A5E03433511-05
21
List of abbreviations
4
Abbreviations
Abbreviation Full term Meaning
> Greater than Mathematical sign for inequality
< Less than Mathematical sign for inequality
% Percent Mathematical sign for the hundredth part of a whole
CO Carbon monixide or
carbonous oxide
(molecular formula)
A colorless, odorless, and tasteless gas, which is highly toxic to
humans and animals in higher quantities. It consists of one carbon
atom and one oxygen atom, connected by a triple bond that consists
of two covalent bonds as well as one dative covalent bond.
In case of SITRANS SL: A measuring component
DC Diagnostic Coverage Parameter which describes the ratio of the failure rate of detected
dangerous failures to the failure rate of all dangerous failures.
FIT Failure In Time Frequency of failures of the protective function.
FMEDA Failure Modes, Effects and
Diagnostic Coverage Analysis
Method to determine out of an overall failure rate of a system the
proportion of failures without the potential to bring the safety-
instrumented system into a dangerous or impermissible functional
status (SFF) and the diagnostic coverage (DC) according to the
requirements to IEC 61508.
HFT Hardware Fault Tolerance Capability of a function unit to continue execution of a required
function in the presence of faults or deviations.
IEC International Electrotechnical
Commission
An international standards organization dealing with electrical,
electronic and related technologies
I/O Input/Output I/O refers to the communication between an information processing
system (such as a computer), and the outside world, such as a
human, or another information processing system. Inputs are the
signals or data received by the system, and outputs are the signals
or data sent from it.
LUI Local User Interface User interface for access to Siemens Process analyzers and
instruments
mA Milliampere A unit of electrical current
MLFB Maschinenlesbare
Fabrikatebezeichnung
German for
Machine-readable product identification, a product code
MTBF Mean Time Between Failures Average period between two failures
MTTR Mean Time To Repair Average period between the occurrence of a fault on a device or
system and its repair
NAMUR Normenarbeitsgemeinschaft für
Mess- und Regeltechnik
NAMUR is an international user association of automation
technology in process industries
To Next Page
Loading...
