12E5119 Instruction Manual QuickTOC
®
ultra
IECEx 135
7 How to Work with the Analyser
7.10 Calibration
LAR | PROCESS ANALYSERS AG
7.10.1 Calibration Settings
This display can be used to adjust the settings for a calibration.
Repeats (user level 3 only):
This value determines with how many individual measurements to be carried out in succession, the
measured value of the selected sample flow is to be determined. The permissible values are between 1
and 10 repetitions. The default value is 5 (1 measurement / 4 repetitions). If several measurements of a
calibration standard are made in succession, an average value is additionally formed and output in ad-
dition to the individual measured values. The measurement repetition always takes place with the same
sample, without refilling the sample storage vessel. The injection needle is always rinsed between the
repeated measurements.
Outliers (user level 3 only):
With the help of this function, incorrect measurements during the calibration are excluded from the ave-
raging. The permissible values are between 0 and 4 repetition measurements. To eliminate outliers, the
measurements with the greatest deviation from the mean are chosen. If the deviation lies in the tolerance
range of the largest permitted CV value for a measurement, the measured value of the individual measu-
rements is used for averaging. If the deviation is outside the tolerance range, the measured value is
treated as an outlier and is ignored when calculating the mean value and the coefficient of variation.
Max. CV (user level 3 only):
The maximum CV value or coefficient of variation only becomes effective in combination with the measu-
red value outliers. If Measured Outlier Correction is activated by entering the numbers 1 or 2, the largest
allowable CV value for a measurement is taken into account in determining the outlier. The permissible
values are between 0% and 100%. The coefficient of variation describes the repeatability or reproduci-
bility of several consecutive individual readings taken on the same sample.
CV = standard deviation / mean * 100
Fig. 98: Calibration settings (Example)
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