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Calibr. Data transfer
Select “Yes” to copy the calibration data of a product that has already been calibrated.
Sequence:
Yes <enter>
Product X <enter> Y <enter>
etc.
Then run through Rate 1. to Rate 10. and correct them if necessary.
1. Rate to 10. Rate
You need at least 2 calibration points (except for one-point calibration, see chapter 8
CALIBRATION). You have to run through all 10 points. Calibration points with zero values
are not calculated.
Data can be entered or read in by pressing the <run> button. In the latter case, the
count rate and – if a temperature sensor is connected and instrument configuration with
temperature compensation has been selected – the actual product temperature is read
in. As soon as the measured value is stable, press the <run> button again to stop the
reading-in process. Press <enter> to confirm the read-in or entered value.
If you push <more> to go to the next item without pushing <enter> first, the
values will not be saved.
Rate: Count rate in cps is read-in or entered.
Density: Enter the density value determined in the lab.
Temp: Temperature is read-in automatically and taken into account when enabling
temperature compensation. Otherwise, this parameter is not relevant.
sk2: Calculate
Calibrate mode
Select the calibration mode: on/lin/squ/cub/auto (see also 8.1)
One-point For one-point calibration we only need one value pair (count rate and den-
sity or concentration value) and the absorption coefficient. For common
products it can be taken from the table in the Appendix and entered as coef-
ficient a1.
Linear Linear curve fit is used if at least two value pairs are available. It should also
be used when several calibration points are available which are very close
together, so that not the entire measuring range is covered by samples.
Square Square curve fit can be selected if at least 3 calibration points are available
which are distributed fairly evenly over the measuring range or if the meas-
urement is carried out in %-concentration, °Bx or in another unit which is
not in linear correlation with the density.
Cubic Cubic curve fit should be applied when the same conditions exist as under
square, but at least 4 value pairs are available and it becomes apparent dur-
ing operation that values deviate in some parts when using square.
Auto The program automatically selects the best curve fit .
At least 4 value pairs must be available for this function.
Select the calibration mode and push <enter> to calculate the calibration factors.
Exception: The defaulted coefficient is used for one-point calibration.
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