Operation
XD 7500
54
ba77191e01 - 71310060
04/2018
4.5.10
User calibration (standard adjustment)
With some methods for concentration measurement, there is the possibility
to optimize with a user calibration the original calibration stored with the
method.
This makes sense, for example, if the original calibration of the method has
changed due to the lot.
When creating a user-defined method, you can also allow a user calibration
(see Section 4.5.12).
A user calibration is only valid if it deviates from the original calibration by at
least 30%.
The absorbance for a user calibration can be measured as a single measure-
ment or multiple measurement. With multiple measurement, the absorbance
is calculated as the median from the individual measured values.
If a method is called up for which a user calibration is possible, a query
appears asking whether the user calibration should be utilized.
If a method is called up for which a user calibration is required, the user cal-
ibration has to be carried out before the first measurement.
The use of the user calibration is documented together with the measured
value and displayed in the measurement value view with [Cal].
Validity
A user calibration is always stored for the method just called up. A user cali-
bration is only deleted if
a new user calibration is done
the original calibration for the measurement is selected
the user calibration is erased manually
the photometer is reset to the default condition.
Carrying out a user
calibration
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