Vega MINITRAC 31 Operating Instructions Manual page 41

6 Set up with the display and adjustment module
Select " Show table" to display and edit the linearisation points.
Select " Linearisation - New" to enter the first point.
Select " Determine count rate" to enter the first point.
The determination of the actual count rate lasts 2 minutes. After the
count rate has been determined, you can accept the value (ct/s).
The count rate is stated in ct/s. This is the number of counts per sec-
ond, i.e. the measured radioactive radiation dose actually reaching
the sensor.
Enter now the corresponding density value (g/cm ).
3
You thus assign a corresponding density to the actual count rate.
Note:
If possible, take a product sample and determine the density simulta-
neously in your sampling position.
It has proven marking the product smaples with date and respec-
tive count rate. Hence the values can be assigned later on without
problems.
Accept the value pair with " OK".
Enter as many linearization points as possible. You can influence
the accuracy of the density measurement by doing this. The more
linearization points you enter and the higher the difference between
the density values, the more reliable the measurement.
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MINITRAC 31 • Foundation Fieldbus