Metrohm tiamo 2.4 Manual - Manual (Page 1182)

5.6 Commands
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tiamo 2.4
5.6.6.3 DOS
5.6.6.3.1 DOS - Overview
Menu item: Method ▶ Paste ▶ New command...
Command for controlled dosing with possibility for monitoring of mea-
sured value and temperature.
Principle
A predefined volume of a solution is dosed with the DOS command with
simultaneous monitoring of measured value and temperature. Three dif-
ferent dosing types can be selected for the dosing. Two of the three
parameters Volume, Dosing rate and Dosing time can be specified.
The third parameter is calculated according to the following formula:
Volume = Dosing time • Dosing rate
If continuous dosing is required, a tandem dosing setup can be used, i.e.
dosing is carried out with a combination of two dosing devices. The sec-
ond dosing device is dosing while the first one is being filled and vice-
versa.
Commands
Depending on the measured value, one of the following two DOS com-
mands can be selected:
￭ 5.6.6.3.4DOS pH
Controlled dosing with the measured quantity pH.
￭ 5.6.6.3.5DOS U
Controlled dosing with the measured quantity voltage U.
5.6.6.3.2 DOS - Monitored dosing
Tab: Method ▶ Commands ▶ DOS ▶ Dosing parameters
Command name
Name of the command.
Entry 25 characters
Dosing criterion
Selection Volume/dosing rate | Volume/dosing time |
Dosing rate/dosing time
Default value Volume/dosing rate
Specification of volume and dosing rate
You define the volume to be dosed and the desired dosing rate. The filling
times prolong the dosing process.