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4 stop conditions, Stop conditions – Metrohm 916 Ti-Touch User Manual

Page 330

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28.3 Endpoint titrations (SET)

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314

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916 Ti-Touch

-
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
(see Chapter 28.3.4, page 314). The entry of an extraction time may be
advisable, e.g. for the titration of sparingly soluble samples.

Input range

0 - 999999 s

Default value

0 s

Temperature

Temperature entered manually. The temperature is being continuously
measured when a temperature sensor is connected and when Temp.
measurement
= automatic or continuous is defined (see sensor dialog
of the command). This value is used for temperature correction in pH
measurements.

Input range

–20.0 - 150.0 °C

Default value

25.0 °C

Time interval MP

Time interval for entering a measuring point in the measuring point list.
The measuring point list is limited to 1000 measuring points.

Input range

0.1 - 999999.0 s

Default value

2.0 s

28.3.4

Stop conditions

The conditions for canceling the titration are defined under [Stop condi-
tions]
, if this does not occur automatically. This could be the case when
the endpoint set is not reached or if the stop criterion (see "Stop crite-
rion", page 312)
is not fulfilled.

Stop volume

The titration is stopped when the specified volume has been dosed since
the start of the titration. This volume should be adjusted to the size of the
titration vessel in order to prevent the contents from running over.

Input range

0.00000 - 9999.99 mL

Default value

100,000 mL