Metrohm tiamo 1.0 Manual - Manual (Page 392)

368 Method
SET
Command for Set Endpoint Titrations ( SET ).
Principle
With this command titrations to one or two preset endpoints are carried out. The
termination of the titration at the endpoint is either drift-controlled or after a waiting
period. The volume that has been added when the endpoint is reached gives the
calculable reagent consumption.
Reagent addition takes place in three phases during the titration:
• Initial addition
During this phase the dosing rate increases continuously. It starts with
the
Minimum rate and increases to the Maximum rate .
• Continuous addition
In this phase addition is carried out at the Maximum rate until the Con-
trol range is reached.
• Control range
In this range addition is finely controlled. Shortly before the end point
is reached addition is only carried out at the
Minimum rate (see "Con-
trol range").
Note
This command is used for rapid routine determinations when the end point does
not change throughout a series or when an excess of reagent must be avoided.
Commands
Depending on the measured value one of the following four SET commands can
be chosen: