Metrohm tiamo 1.2 Manual - Handbuch (Seite 364)

338 Method
Fix EP# at
0.00000 ... 9999.99 mL, [ off ]
Fix end point 1 ... 9 for Fixed quantity = Volume .
With this button additionally to the always shown fix EP1...3 the fix EP4...9
are displayed.
With this button instead of fix EP1...9 only the fix EP1...3 are shown.
pK/HNP evaluation
on, [ off ]
With this evaluation from the titration curve the pK value can be determined
.which corresponds to the pH value at the half neutralization point (see Ti-
tration commands - Evaluation - pK value and half neutralization potential).
Minimum evaluation
on, [ off ]
For the minimum measured value the associated volume, time and tem-
perature are interpolated from the list of measuring points (see Titration
commands - Evaluation - Minimum/maximum evaluation).
Threshold value
0.1 ... [ 1.0 ] ... 20.0 pH/mL
The evaluation begins as soon as the slope of the curve exceeds the set
threshold value.
Maximum evaluation
on, [ off ]
For the maximum measured value the associated volume, time and tem-
perature are interpolated from the list of measuring points (see Titration
commands - Evaluation - Minimum/maximum evaluation).
Threshold value
0.1 ... [ 1.0 ] ... 20.0 pH/mL
The evaluation begins as soon as the slope of the curve exceeds the set
threshold value.
Break point evaluation
on, [ off ] (only Titrando)
With the break point evaluation sharp changes of direction in the titration
curve are determined (see Titration commands - Evaluation - Breakpoint
evaluation).
EP criterion
0 ... [ 0.3 ] ... 1.0
Measure of the minimum sharpness of the break point. The lower the EP
criterion set, the more break points will be found. As this is a relative value
related to the total measured value alteration, for a small measured value
range even small changes in the measured value can be evaluated as a
break point.
Slope
0.0 ... [ 0.9 ] ... 10.0
Minimum difference between the slope before and after the break point.
The smaller the difference, the more break points will be found.
Smoothing factor
2 ... [ 5 ] ... 20
The higher the smoothing factor, the fewer break points will be found.