IMKO SONO-VARIO LD, Руководство пользователя

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1. Instrument Description SONO-VARIO
1.1.1. The patented TRIME
®
TDR-Measuring Method
The TDR technology ( T ime- D omain- R eflectometry) is a radar-based dielectric measuring procedure
at which the transit times of electromagnetic pulses for the measurement of dielectric constants,
respectively the moisture content are determined.
SONO-VARIO consists of a high grade steel casing with a wear-resistant sensor head with ceramic
window. An integrated TRIME TDR measuring transducer is installed into the casing. A high
frequency TDR pulse (1GHz), passes along wave guides and generates an electro-magnetic field
around these guides and herewith also in the material surrounding the probe. Using a new patented
measuring method, IMKO has achieved to measure the transit time of this pulse with a resolution of
1 picosecond (1x10
-12
), consequently determine the moisture and the conductivity of the measured
material.
The established moisture content, as well as the conductivity, respectively the temperature, can
either be uploaded directly into a SPC via two analogue outputs 0(4) ...20 mA or recalled via a
serial RS485 interface.
1.1.2. TRIME
®
compared to other Measuring Methods
In contrary to conventional capacitive or microwave measuring methods, the TRIME
®
technology
( T ime-Domain- R eflectometry with I ntelligent M icromodule E lements) does not only enable the
measuring of the moisture but also to verify if the mineral concentration specified in a recipe has
been complied with. This means more reliability at the production.
TRIME-TDR technology operates in the ideal frequency range between 600MHz and 1,2 GHz.
Capacitive measuring methods (also referred to as Frequency-Domain-Technology) , depending on
the device, operate within a frequency range between 5MHz and 40MHz and are therefore prone to
interference due to disturbance such as the temperature and the mineral contents of the measured
material. Microwave measuring systems operate with high frequencies >2GHz. At these frequencies,
nonlinearities are generated which require very complex compensation. For this reason, microwave
measuring methods are more sensitive in regard to temperature variation.
SONO probes calibrate themselves in the event of abrasion due to a novel and innovative probe
design. This consequently means longer maintenance intervals and, at the same time, more precise
measurement values.
The modular TRIME technology enables a manifold of special applications without much effort due
to the fact that it can be variably adjusted to many applications.
1.1.3. Areas of Application with SONO-VARIO
Standard
, SONO-VARIO
Xtrem
and SONO-VARIO
LD
SONO-VARIO is suited for moisture measurement of different materials. An installation is possible
into containers, hoppers, above conveyor belts, or in silos.

The SONO-VARIO
Standard
is suited for measuring of normal abrasive materials like sand and
gravel up to 4mm. The probe head consists of stainless steel with a rectangular ceramic window.

The SONO-VARIO
Xtrem
is suited for measuring of very high abrasive materials like gravel 4/32 and
grit. The probe head consists of hardened steel with a rectangular special ceramic window.

The SONO-VARIO
LD
(Low Density) is suited for moisture measurement of materials with low
density like corn, wood chips and other materials. For wood chips and other very loose materials
which show a bad flowability, an installation inside a screw conveyor is recommended due to
homogenuous densities inside a screw conveyor.