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I
Interface Measurement: Level measurements where to two liquids meet. For
example, an oil layer on top of water. Where the two meet is referred to as the
interface level.
International Electrotechnical Commission Explosive Scheme (IECEx): IECEx
certification provides assurance that the strictest safety requirements of IEC
International Standards are met. Designed to facilitate the international trade of
electrical equipment used in explosive, hazardous environments.
L
Latching Mode: A parameter in the Level transmitter Advanced Display which allows
for the selection of the behavior of the Level transmitter in the event of a critical error.
In this mode, the transmitter wills stay in the critical error state until a user performs a
hardware or software reset.
Lower Range Value (LRV): A Basic configuration parameter which allows users to
enter the measuring value for which the analog output will be scaled to 4 mA.
Lower Product: The heavier liquid when two liquids exist in a vessel (e.g. water in
an oil/water measurement application).
M
Maintenance Mode: A mode that the transmitter supports to communicate to external
systems that it is not available for process measurement.
Maximum Level Speed: Used to define the Maximum rate of filling or emptying.
Default setting is 0.2m/s.
N
NAMUR NE 43: NAMUR is an international association of process instrumentation
user companies. NE 43 is a NAMUR recommendation to promote a standardization
of the 4-20mA signal level for failure information. Normal 2-wire transmitters use the
3.8 to 20.5mA signal range for measurement information, with ≥21mA or ≤3.6mA to
indicate diagnostic failures.
National Pipe Thread (NPT): A U.S. standard for tapered threads used on threaded
pipes and fittings.
Non-Contact Radar (NCR): A method commonly used to measure levels of liquid
and solid materials. Low frequency microwave pulses are guided by a metal probe
and reflected off a surface to determine levels in tanks.
O
Operating Range: The range of conditions in which the transmitter is designed to
operate.
Revision 2
SLN 700 SmartLine NCR Level Transmitter User's Manual
Page 45
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