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5 Initial operation and adjustments
5.1 Adjustment Guidelines for Moisture Measurements
Please read the detailed description first and subsequently use these guidelines as a checklist for adjustments.
1. Extract samples from as close as possible to the probe.
2. Select calibration curve with help of SONO-VIEW or via the module SM-USB.
3.
Note: TRIME-GW Line is initially adjusted for the application for grain with the calibration curve Cal2. The
analogue outputs are adjusted to 4..20mA. With this pre-adjustment TRIME-GW Line can be installed direct
in the silo, without further adjustments.
4. Determine the difference between the target and the actual value and if necessary adjust the offset of the
selected calibration curve.
5. Repeat this procedure for different grain types.
5.2 How to use the Calibration Curves Cal1 to Cal15
Up to 15 different calibration curves (CAL1 ... Cal15) are stored inside the TRIME-GW Line. They can be activated
in two ways:
The calibration curve (Cal1. .15) can be activated with the module SONO-VIEW which is working offline or online
with a connection via a PC. In the menu "Calibration" and in the window “Material Property Calibration" by selecting
the desired calibration curve (Cal1...Cal15) and with using the button “Set Active Calib”. The finally desired and
possibly altered calibration curve (Cal1. .15) which is activated after switching on the probes power supply will be
adjusted with the button "Set Default Calib”.
The TRIME-GW Line can only be adjusted when installed in the plant as the location and the bulk density of the
grain have a significant influence on moisture measurement. Adjustment must be carried out separately for every
dried product. Moisture measurement is influenced by the following parameters:
•
Location (e.g. metallic objects within the field of measurement)
•
Bulk density of the grain (or material)
•
Type of grain (material)
As soon as one of these parameters changes, another calibration curve and adjustment must be chosen. If all
possible grain types are adjusted, it is only necessary to select the right calibration curve when changing the grain
type in the plant.
The following charts (Cal.1 .. Cal15) show different selectable calibration curves which are stored inside the TRI-
ME-GW Line.
Plotted is on the y-axis the gravimetric moisture (MoistAve) and on the x-axis depending on the calibration curve
the associated radar time tpAve in picoseconds. With the software SONO-CONFIG the radar time tpAve is shown
on the screen parallel to the moisture value MoistAve (see "Quick Guide for the Software SONO-CONFIG).
