102 Instruction Manual QuickTOC
®
ultra
IECEx 12E5119
7 How to Work with the Analyser
7.7 Measurement Settings LAR | PROCESS ANALYSERS AG
This value indicates the reactor injection volume for a TC measurement [in μl].
TIC injection volume:
This value indicates the reactor injection volume for a TIC measurement [in μl].
Repetitions:
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 1 (1 measurement / no repeat). If several measurements of a
sample stream take place in succession, an average value is calculated from the determined measured
values, which is then output as a measured value. The measurement repetition always takes place with
the same sample, without refilling the sample storage vessel. The injection needle is always rinsed bet-
ween the repeated measurements.
Outliers (only active if repeated measures take place):
With the help of this function incorrect measurements from the averaging are excluded. The permissible
values are between 0 and 5 repeat 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 measurements 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:
The maximum CV value or coefficient of variation only becomes effective in combination with the measu-
red value outliers. If the measured value outlier correction by entering the numbers 1 or 2 - 5 activated,
the largest allowable CV value for a measurement in the determination of runaway is considered. The
permissible values are between 0% and 40%. The coefficient of variation describes the repeatability or
reproducibility of several consecutive individual readings taken on the same sample.
CV = standard deviation / mean * 100
Percentage for multiple determination (user level 3 only):
This value defines the maximum allowable deviation of the current measured value compared to the pre-
viously acquired value. If a measured value exceeds this deviation, the "repetitions" become active.
Moving average calculation:
The floating mean value is used to smooth the measurement series. For each sample stream, a floating
mean value can be set. This requires two settings to be made visible as soon as the moving average is
activated. In the moving average calculation, an average value is calculated from a certain number of
the last measured values (measurement series). If the next measured value lies within the permitted de-
viation, it is included in the series of measurements for the mean value calculation and the oldest measu-
red value is removed from the series of measurements. If the next measured value is outside the
permitted deviation, a new series of measurements is started with this measured value.
Number of values (moving average calculation):
The permissible values are between 2 and 5 measured values, which are taken into account for the cal-
culations.
Allowed deviation in percent (moving average calculation):
The permissible values are between 20 and 50% (in 10% increments).
Notice
The result is only the mean value.
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