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8. CALIBRATION
Calibration is carried out as follows:
The counts supplied by the detector are read into memory at various product densities or
concentrations. At the same time, the product temperature is automatically stored. The
density or concentration values (analysis values) determined in the lab are entered in
another memory. The diagram below illustrates the correlation of memories.
Count rates:
Rate:
Density/
Concentration
(Lab values):
Product
temperature:
1: 3012 1.234 25
2: 2801 1.322 22
3: 2567 1.381 23
4: 2711 1.363 ...
... ...
... ...
10: 0 0 0
Calibration points should be distributed fairly evenly over the entire measuring
range. Some calibration points may lie outside the measuring range (e.g. water). How-
ever, calibration with all points lying outside the measuring range is not advisable.
8.1.1 Calibration Modes
The calibration mode has to be entered in the Calibrate menu, submenu Calculate. Five
calibration modes are available.
Calibrate mode 1: One-point calibration
Select one and enter the absorption coefficient
Select this calibration mode if
• only one value pair is available
or
• only provisional calibration is to be performed.
Calibrate mode 2: Linear curve fit
Select lin.
Chose this calibration if only two value pairs are available.
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