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29 Parameters
900 Touch Control
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291
Figure 14 Tubbs method for determining the equivalence point
The figure shows that the evaluation still requires measured values from
the measuring point list even after the equivalence point.
For the recognition of the EPs found, the set EP criterion is compared to
the ERC (Equivalence point Recognition Criterion) found. The ERC is the
first derivative of the titration curve combined with a mathematical func-
tion that is more sensitive for flat jumps than for steeper ones. EPs whose
ERC is smaller than the defined EP criterion will not be recognized. The
ERC is displayed in the results dialog for each discovered and recognized
EP. If you adjust the EP criterion later in order to recognize more or fewer
EPs, then you can reevaluate the determination ([Recalculate] function in
the results dialog).
29.1.5 Control instrument
The control instrument the determination is carried out with is selected
under [Control device]. Control instruments are defined under Sys-
tem ▶ Device manager.
NOTICE
This button is only displayed when several control instruments have
been configured.
Control device
Selection of the control instrument from the list of devices. Only those
devices are displayed which are able to carry out the command. The con-
trol instruments do not have to be connected. This allows to transfer
methods more easily from one system to another.
Selection Selection of configured control instruments
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