18
Calibration
Curve
Recommended for
grain type
Bulk density
of grain type
Application
Cal1
Maize, without TC
(TC = Temperature
Compensation)
0,75
Installation at the discharge hopper. The outfeed is
batch by batch and it is not secured, that the 1-rod
probe is continually covered with grain.
Cal2
Maize with TC
0,75
Installation inside a silo where the 1-rod probe is
continually covered with grain.
Cal3
Wheat without TC
0,75
Pre-installed like Cal1
Cal4
Wheat with TC
0,75
Pre-installed like Cal2
Cal5
Rye without TC
0,72
Pre-installed like Cal1
Cal6
Rye with TC
0,72
Pre-installed like Cal2
Cal7
Barley without TC
0,63
Special calibration curve
Cal8
Barley with TC
0,63
Special calibration curve
Cal9
Rape and oilseeds
without TC
0.65
No temperature compensation necessary!
Cal10
Sunflower seeds wit-
hout TC
0,30
No temperature compensation necessary!
Cal11
Soya without TC
0,65
Special calibration curve
Cal12
Soya with TC
0,65
Special calibration curve
Cal13
Cal14
(pre-setted
after delivery)
Corn ear of maize
0,5
Special calibration curve
Cal15
1/10 tp
Radar time and reference calibration for test
5.4 Selection and application of the reference method
In order to adjust the TRIME-GW Line for precise absolute measurements at the discharge, an off-line measurement
method must be available to serve as a reference. It must provide a high degree of absolute precision and function
with large sample volumes.
The TRIME-GW Line measures the average value continuously over a large measurement volume. In moving grain,
the results of multiple measurement volumes can be accumulated in respect to the chosen avereging time. It
therefore requires a lot of time and effort to verify this very representative value with a reference instrument
mostly using much more smallersample quantities. The most suitable method for determining the exact moisture
of the grain is to use a drying oven. The sample volume is of importance and should be at least 0.5 litres.
For sample extraction and making reference measurements please take the following best practice points into
account:
