3.2.5
Recording measurement data in trial operation
The product selector-switch can only be adjusted in real operation or in realistic trial operation. The
following description is based on the implementation of the TRIME
®
-GW in a grain dryer as this in-
volves more complex adjustment than in the delivery or storage area.
As a general rule, only the moisture range close to the reference input is of significance for trial opera-
tion, i.e. when determining the switch position for maize, checking should be done at about 15%. It is
more important that the TRIME
®
-GW is exactly correct in the lower area of measurement. It is of less
importance whether TRIME
®
-GW measures 26% instead of 28% in the upper range! When extracting
a sample or checking the lower reference input (e.g. 15% ), a single sample is of course insufficient. A
single sample, possibly even extracted from quite a different point than in the direct vicinity of the pro-
be, is not at all representative, i.e. several samples must be taken directly at the probe and averaged!
At the start of trial operation, the product selector-switch can be set to
Level 1.
When all the preparations for extracting samples and measuring them have been made, the grain
dryer can be started up. Now, a sample of grain must be taken continuously, ideally every 15 minutes.
The TRIME
®
-GW reading
and the selected switch position
are to be noted simultaneously with
every extracted sample. This is compared with the appropriate offline-determined reference value,
which is also to be noted. As soon as the moisture is near the target moisture, the product selector-
switch should be set to the best possible value, which is the nearest to the reference value.
On page 30 you will find a ready-to-use form for entering the measurements.
Where
continuous-flow dryers
are concerned, at least 10 to 20 measurements should be
available in the range between the minimum and maximum permissible moisture content after
drying. The measurements from the still very damp discharged grain during the charge phase
should be noted but not used for the purposes of adjustment.
For
rotary dryers
, only the measurements take towards the end of the drying process are of
relevance to adjustment. Here, too, at least 10 measurements are to have been documented.
Density and moisture distribution effects in the grain can cause too low measurements during
the first one to two hours. These values should not be used for the adjustment.
3.2.6
Setting the product selector-switch (adjustment)
The appropriate setting of the product selector-switch should be determined on the adjustment proto-
col. Only the measurements near the target moisture should be taken into account.
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Summary of Contents for Trime-GW
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