Metrohm 900 Touch Control Manual - Manual (Page 330)

29.3 Endpoint titrations (SET)
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900 Touch Control
The titration is stopped when the endpoint and the stop drift have been
reached.
Input range 1 - 999 µL/min
Default value 20 µL/min
Delay time
This parameter can only be edited with Stop criterion = time.
When the endpoint has been reached, the specified time is allowed to
elapse after the last dosing and the titration is then stopped.
Input range 0 - 999 s
Default value 10 s
Endpoint 2
The control parameters for the second endpoint are defined under [End-
point 2]. The parameters and input ranges are identical with those for
the first endpoint.
29.3.3 Titration parameters
Under [Titration parameters], the parameters influencing the sequence
of the entire titration are defined.
Titration direction
The titration direction is normally determined automatically from the start
measured value and the set endpoint. It is recommended that, whenever
possible, a positive or negative modification of the measured value is
entered. If two endpoints have been set then the titration direction will be
defined automatically. In this case the setting will be ignored.
Selection + | - | auto
Default value auto
+
Positive measured value modification, i.e. in the direction of a higher
pH value, greater voltage or greater current.
-
Negative measured value modification, i.e. in the direction of a lower
pH value, lesser voltage or lesser current.
auto
The titration direction is determined automatically from the start mea-
sured value and the set endpoint.
Extraction time
Minimum duration of the titration. The titration will not be stopped during
the extraction time, even if the endpoint has already been reached. The
titration is however stopped if a stop condition is fulfilled during this time