Metrohm 900 Touch Control Manual - Manual (Page 427)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
29 Parameters
900 Touch Control
￭￭￭￭￭￭￭￭ 411
Measuring mode Upol:
Input range
0.5 - 10.0
Default value 5.0
With titrations the unit is µA/mL, with measure-
ments µA/s.
Measuring mode T:
Input range
0.1 - 20.0 °C/s
Default value 1.0 °C/s
Measuring mode Cond:
Input range
0.5 - 999.9 (mS/cm)/s
Default value 5.0 (mS/cm)/s
29.12.4 Break point evaluation (EVAL BREAK)
A break point evaluation is used to determine sharp changes of direction
in the titration curve. This evaluation is primarily used for photometric and
conductivity titrations. The method is based on the search for extremes in
the second derivative of the curve.
2nd derivative
Break point
Measured value
Volume / Time
Figure 21 Evaluation of a break point
EP criterion
Measure of the minimum sharpness of the break point. The smaller the EP
criterion set, the more break points will be found. As this is a relative value
related to the total measured value modification, even small changes in
the measured value can be evaluated as a break point for a small mea-
sured value range.
Input range 0.0 - 1.0
Default value 0.3