IMKO TRIME-GW Series, Руководство пользователя

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2 Mode of Operation
2.1 Measurement value collection with pre-check, average value and filtering
TRIME-GW Line measures internally at a very high rate of measurements per second and issues the resulting
measurement value at a cycle time of up to 200 milliseconds at the analogue output. Within this cycle time
of 200 milliseconds a probe-internal pre-check of the moisture values is included. Only plausible and physically
pre-averaged measurement values are used for the further data processing. This increases reliability and stability
of the measurement output at the interface of the probe.
In the
Measurement Mode CS
(Cyclic-Successive), an average value is not accumulated, and the cycle time here
is 200 milliseconds. In the
Measurement Mode CA and CF
(Average), not the momentarily measured individual
values are directly issued, but an average value is accumulated via a variable number of measurements in order
to filter out temporary variations. These variations can be caused by inhomogeneous moisture distribution of
the material. The delivery scope of TRIME-GW Line includes suited parameters for the averaging period and a
universally applicable filter function deployable for currently usual applications. The time for the average value
accumulation, as well as various filter functions, can be adjusted and customized for special applications.
2.2 Temperature Measurement
A temperature sensor is installed on one stay bar of the 1-rod probe which establishes the measurement of the
material temperature. The temperature can optionally be transmitted at the analogue output 2.
2.3 Temperature compensation when working at high temperatures
Because the TRIME-GW Line measurement transformer works in other temperature ranges as the 1-rod-probe
inside the dryer, it is necessary to compensate the electronic separately from the 1-rod-probe. TRIME-GW Line
offers two possibilities for temperature compensation.
A) Temperature compensation of the internal TRIME-electronic
Despite the TRIME-GW Line electronic shows a generally low temperature drift, it is necessary to compensate a
temperature drift in applications for measuring moisture inside a grain dryer. With this method of temperature
compensation, a possible temperature drift of the TRIME-electronic can be compensated. For standard applications
in grain drying the compensation parameter is pre-set to TempComp = 0.2. For special applications it could be
necessary to adjust this parameter. But it is to consider that it is necessary to make a Basic-Balancing of the
TRIME-GW Line in air and dry glass beads if the parameter TempComp is changed to another value. The parameter
TempComp can be changed with the software tool SONO-CONFIG, in the menu
"Calibration"
and the window
"Temperature-Compensation"
.
B) Temperature compensation for the measured material
Water and special materials like maize, wheat and others, show a dependency of the dielectric permittivity when
using TRIME-GW Line at high temperature ranges. The dielectric permittivity is the raw parameter for measuring
water content with TRIME-GW Line. If special materials show this temperature drift, it could be necessary to use
a more elaborate temperature compensation. TRIME-GW Line offers the possibility to set special temperature
compensation parameters for every calibration curve Cal1 of Cal15 (see chapter “Selection of the individual
calibration curve”).
2.4 Analogue Outputs
The measurement values are transmitted as a current signal via the analogue output. With the help of the service
program
SONO-CONFIG
, the TRIME-GW Line can be set to the two versions for 0..20mA or 4..20mA. Furthermore,
it is also possible to variably adjust the moisture dynamic range e.g. to 0-10%, 0-20% or
0-50%
. For a 0-10V DC
voltage output, a 500R resistor can be installed in order to reach a 0..10V output.