01/10 347 LB 444 K-40
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Push +….-
to call further value
• current measured value in the selected unit
• averaged count rate (averaging according to entered time constant)
• actual count rate
• display of the adjusted high voltage
7.4 Correcting the Results: Addition and Multiplication
This option should not be regarded as a substitute for careful calibration. It should only
be used for minor corrections. Otherwise we recommend doing a re-calibration.
An additive constant can be entered at Offset, a multiplication factor at Factor Calibrate
menu, submenu Calculate).
7.4.1 Additive Constant
The value stored under Offset is added to the concentration value calculated on the basis
of the count rate. This allows a parallel shift of the calibration curve.
Example:
Measuring range 10-30% K20
It is found that the measuring values are too low by 2% K20.
Remedy:
Enter “2.0” at Offset.
All measured values will be increased by 2.0% K20.
Instead of 10% K20, 12% K20 is now indicated and instead of 30% 32% K20. If the
measured values are too high by 2% K20, you have to enter “- 2.0”.
7.4.2 Multiplication Factor
Each measured value is multiplied by the value stored as Factor. This allows you to
change the gradient of the calibration curve.
Example: Measuring range 10 - 30% K20
If you enter 1.1 at Factor, 11% K20 will be displayed instead of 10% K20. At 30% K20
now the value 33% K20 appears. Thus, even the low point of the measuring range is
increased, provided it is not at 0.
Remedy: This can be corrected by entering the appropriate data under Offset and
Factor:
Example:
For 10% K20 the indicated value is correct, instead of 20% K20 the reading should show
22 K20.
Input value for Factor:
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