Glossary - Honeywell SmartLine SLG 700 User Manual

8 Glossary

Accuracy: The closeness of the agreement between the result of the measurement and the
conventional true value of the quantity. Accuracy should not be confused with precision. The quoted
accuracy depends on the initial characterization, the reproducibility of the standard, and the stability
of the measurement between calibrations. The actual accuracy also depends on the equipment
performing and being operated to specification.
Application and Validation Tool (AVT): The online tool which allows users to input technical data
about a specific process tank and to validate that the correct level transmitter application is delivered
to the site ready to install.
ATEX Directive: Consists of two European Union directives which describe the acceptable
equipment and work environment permitted in an environment with an explosive atmosphere.
Blocking Distance: A zone where measurements are not performed.
Burnout: Transmitter burnout status indicates a critical sensor failure has occurred. In a HART
transmitter, burnout status can be configured to set the analog output to ≤ 3.6mA (downscale) or ≥
21.0mA (upscale).
Canadian Standards Association (CSA): A not-for-profit standards organization which develops
standards. The CSA registered mark shows that a product has been independently tested and certified
to meet recognized standards for safety or performance.
Cyclic Redundancy Check (CRC): An error-detecting code commonly used in digital networks and
storage devices to detect accidental changes to raw data.
Damping: Applies digital filtering to suppress noise effects on the PV. The range is from 0.0 to 60.0
seconds.
Digital to Analog Convertor (DAC): A function that converts digital data (usually binary) into an
analog signal (current, voltage).
Device Description (DD): Files describing the configuration of a transmitter for use by handheld or
PC applications.
Device Type Manager (DTM): A Device Type Manager is part of the Field Device Tool (FDT)
standard, and is a software component for a device that contains the device-specific data, functions
and logic elements.
Dielectric constant (DC): The ratio of the conductivity of a material to that of a vacuum. In level
measurement, a high DC indicates a non-conductive or insulating material
Equivalent-Time Sampling (ETS): Is a method of increasing the effective sampling rate. ETS
constructs a repetitive signal by capturing small parts of the waveform from successive triggered
acquisitions. This enables the accurate capture of signals whose frequency components are much
higher than the maximum sample rate.
Factory Mutual (FM): Provides third-party certification and approval of commercial and industrial
products, including Hazardous Location Electrical Equipment.
Field Device Tool (FDT): A general purpose application / tool that allows users to manage many
DTMs running their individual transmitters.
SLG 700 SmartLine Level Transmitter User's Manual
Page 162 Revision 8