50-660 Kotron Model 805 Smart RF Level Transmitter
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Glossary (continued)
Media
The liquid material being measured by the level
transmitter.
Multidrop
The ability to install, wire, or communicate
with multiple devices over one cable. Each device is given
a unique address and ID.
Nonhazardous Area
An area where no volatile mixtures
of vapors/gas and oxygen will be found at any time.
Also
called General Purpose Area.
Non-incendive
Equipment and wiring which in its nor-
mal operating condition is incapable of igniting a specific
hazardous atmosphere or hazardous dust layer.
Offset
The distance from the bottom of the tank to the
bottom of the probe.
Password
A numerical value between 0 and 65,000 that
protects stored configuration data from unauthorized
manipulation.
Percent (%) Output
The present reading as a fraction of
the 16 mA scale (4–20mA).
Poll Address (HART ID)
A number between 1 and 15
which sets an address or location of a device in a multi-
drop loop.
Probe
A waveguide that propagates an electromagnetic
pulse from the top of the tank into the process fluid.
Probe Length
Exact measurement from the bottom of
the process thread connection to the very bottom of the
probe.
Probe Type
Particular RF configuration or design. Each
probe type is designed to accomplish specific objectives in
an application.
QuickStart
The essential information needed for the
Model 805 transmitter and probe to be installed, wired,
and calibrated.
Range
A value related to probe length (factory setting).
Relative Dielectric (
ε
r)
A unitless number that indicates
the permitivity of a material.
Repeatability
The maximum error between two or more
output readings of the same point.
RFI
Radio Frequency Interference
Electrical noise that can
have an adverse affect on electrical circuits, particularly
low-power devices.
Span
The difference between the upper and lower limits
of the range.
Specific Gravity (SG)
The ratio of the density of a
material to the density of water at the same conditions.
Tst Loop
Test Loop
Built-in system capability to
test/calibrate a loop (or separate loop device) by driving
the transmitter output to a particular value.
Trim 4/Trim 20
Built-in system capability to fine tune
the 4 mA and 20 mA points so the transmitter output
corresponds exactly to user’s meter, DCS input, etc.
Two Wire
An electrical instrument design that uses
one set of wires to provide both the supply power and
process measurement signal. The process measurement is
achieved by varying the current of the loop. Also called
Loop Powered.
Units
The engineering units used to measure level in the
system. The choices are in (inches) and cm (centimeters).
