IMKO SONO-VARIO LD, Руководство пользователя

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B) Temperature compensation for the measured material
Water and special materials like oil fruits and others, can show a dependency of the dielectric
permittivity when using SONO probes at high temperature ranges. The dielectric permittivity is the raw
parameter for measuring water content with SONO probes. If special materials show a very special
temperature drift, e.g. in lower temperatures a higher drift than in higher temperatures, than it could be
necessary to make a more elaborate temperature compensation. Therefore it is necessary to measure
in parallel the material temperature with the temperature sensor which is placed inside the SONO
probe. Normally this is related with high efforts in laboratory works. SONO probes offer the possibility
to set special temperature compensation parameters t0 to t5 for every calibration curve Cal1 of Cal15
(see chapter “Selection of the individual calibration curve”). Please contact IMKO should you need any
assistance in this area.
1.2.5. Analogue Outputs
The measurement values are issued as a current signal via the analogue output. With the help of the
service program
SONO-CONFIG, the SONO-VARIO 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 0-30%. For a 0-10V DC voltage output, a 500R resistor can be installed in order to reach a
0..10V output.
Analogue Output 1: Moisture in % (
0…20%, variable adjustable)
Analogue Output 2: Conductivity (RbC) or optionally the temperature.
In addition, there is also the option to split the analogue output 2 into two ranges: into
4..11mA for the temperature and 12..20mA for the conductivity. The analogue output
2 hereby changes over into an adjustable one-second cycle between these two
(current) measurement windows.
For the analogue outputs 1 and 2 there are thus two adjustable options:
Analog Output: (two possible selections)
0..20mA 4..20mA
Output Channel 1 and 2: (three possible selections)
1. Moist, Temp. Analogue output 1 for moisture, output 2 for temperature.
or
2. Moist, Conductivity Analogue output 1 for moisture, output 2 for conductivity in
a range of 0..20dS/m.
or
3. Moist, Temp/Conductivity Analogue output 1 for moisture, output 2 for
both, temperature and conductivity with an automatic current-window change.
For analogue output 1 and 2 the moisture dynamic range and temperature dynamic
range can be variably adjusted. The moisture dynamic range should not exceed
100%
Moisture Range: Temp. Range:
Maximum: e.g. 20 for sand (Set in %) Maximum: 100 °C
Minimum: 0 Minimum: 0 °C