Glossary - Ametek DR6500 Handbook

DR6500

10.6 Glossary

D
Dielectric constant Dielectric constant Dielectric constant Dielectric constant
Direct Plus Direct Plus Direct Plus Direct Plus
Distance Distance
Distance Distance
DTM DTM
DTM DTM
E
Electromagnetic compatibility Electromagnetic compatibility
Electromagnetic compatibility Electromagnetic compatibility
(EMC) (EMC) (EMC) (EMC)
F
FMCW FMCW FMCW FMCW
H
Hazardous area Hazardous area
Hazardous area Hazardous area
I
Interference signals Interference signals Interference signals Interference signals
L
Lens antenna Lens antenna Lens antenna Lens antenna
Level Level Level Level
DR6500-PM-English-Issue 1
An electrical property of the product to be measured used in radar
measurement. Also known as εr, DK and relative permittivity. Defines the
strength of the wave reflected back to the device's signal converter.
Direct Plus mode is an alternative measurement mode. If it is possible
there will be an interference signal in the measurement zone that is larger
than the level signal, select "Direct Plus" mode. If you select "Direct Plus"
mode, the device locks on the level signal and monitors changes in level. If
the device then finds larger reflections in the silo, it will only monitor the
largest signal in a small search zone around the first reflection found and
ignore all other reflections. The interference signal must not be near to the
level signal.
The distance from the face of flange to the level (1 product) or the surface
of the top product (2 or more products). See the diagrams at the end of this
section.
Device Type Manager. A driver for use in the PACTware™ program. All data
and functions of the device are included in it.
Defines how much a device influences or is influenced by other devices that
generate electromagnetic fields during operation. Refer to European
standard EN 61326-1 for further details.
Frequency-modulated continuous-wave radar technology. The signal is
continuously present, but the frequency is modulated, usually in
successive linear ramps over time (frequency sweeps).
An area with a potentially explosive atmosphere. Trained personnel can
install and use a device in this area. The device must be ordered with the
appropriate options. The device requires approvals (ATEX, IECEx, cQPSus,
NEPSI etc.) related to site specifications. You can find more data about
hazardous areas in the Ex Manuals and Ex Certificates of Compliance.
False radar reflections usually caused by equipment in the tank.
An antenna with a small convex or concave surface that is made of a
material that agrees with FDA regulations.
Height from the bottom of the silo (user-defined) to the surface of the top
product (Tank height – distance). See the diagrams at the end of this
section.
www.drexelbrook.com
APPENDIX
10
161