KROHNE OPTIWAVE 7300C EN - Manual (Page 132)

10
APPENDIX
132
OPTIWAVE 7300 C
www.krohne.com 03/2014 - 4000172405 - HB OPTIWAVE 7300 R07 en
10.4 Glossary
D
E
F
H
I
L
Dead zone Dead zone Dead zone Dead zone Non-measurement zone.
Dielectric constant Dielectric constant Dielectric constant Dielectric constant 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.
Distance Distance Distance Distance 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.
Drop antenna Drop antenna Drop antenna Drop antenna A new generation of antenna made of PP or PTFE. It has an ellipsoidal
shape for a more precise emission of radar signals.
DTM DTM DTM DTM Device Type Manager. A driver for use in the PACTware™ program. All data
and functions of the device are included in it.
Electromagnetic compatibility Electromagnetic compatibility Electromagnetic compatibility Electromagnetic compatibility 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.
FMCW FMCW FMCW FMCW 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).
Hazardous area Hazardous area Hazardous area Hazardous area 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, FM, CSA,
NEPSI etc.) related to site specifications. You can find more data about
hazardous areas in the Ex Manuals and Ex Certificates of Compliance.
Horn (cone) antenna Horn (cone) antenna Horn (cone) antenna Horn (cone) antenna A common antenna for most applications. It is used for the controlled
emission and collection of radar signals.
Hygienic antenna Hygienic antenna Hygienic antenna Hygienic antenna An antenna made of a material that agrees with FDA regulations. It can be
supplied with common hygienic process connection options (Tri-Clamp
® ,
BioControl
®
, SMS, ...).
Interference signals Interference signals Interference signals Interference signals False radar reflections.
Level Level Level Level Height from the bottom of the tank (user-defined) to the surface of the top
product (Tank height – distance). See the diagrams at the end of this
section.