Calibration and titrant data, 2 messages – Metrohm 840 PC Control 5.0 / Touch Control User Manual

Page 144

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3.18 Results and more determination data

132

PC Control / Touch Control

The individual variables are described in Section 4.5.7. The ERC

(Equivalence point Recognition Criterion) is a measure of the size of

the jump in the titration curve. The ERC found is compared with EP

criterion defined in the method for the evaluation of the titration

curve (see Section 4.1.1). The ERC is therefore an important quantity if

you have to adapt the parameters for the evaluation of the equivalence

points.

Calibration and titrant data
The [Calibration data] and [Titrant data] buttons in the dialog

More determination data/View data are only present when the

determination has been loaded. In these dialogs the sensor data and

titrant data that were valid at the time when the determination was

carried out are shown. The concentration and titer of the titrant can

be subsequently altered here. When a loaded determination is

recalculated (see Section 3.18.8), the values shown here are used for

the variables TITER and CONC (concentration). Thereby, the values

saved under System/Titrants are not changed. The Calibration

data cannot be altered at a later date.

3.18.2 Messages

If Messages are produced during a determination sequence then

these will be shown under More determination data/Messages. The

[Messages] button in the dialog Results/ More determination data

is only active when messages have been entered during the run.

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