Metrohm 711 Liquino - Manual (Page 26)

3.1 The Liquino concept
711 Liquino, Instructions for use 20
3 Introduction
3.1 The Liquino concept
The 711 Liquino is designed so that, together with one or more 700
Dosinos, it can automate a wide range of tasks in the laboratory. Everything
which falls under the general heading of 'liquid handling', i.e. the transport of
liquids in any form, belongs to its range of applications. Its functions can be
divided up into three steps.
•
Simple manual dosing and dispensing with up to four dosing devices.
• Automated procedures for frequently reoccurring and defined tasks. The
preset modes in the instrument are used for this. When they are appro-
priately set they can be stored as methods in the Liquino itself or on a
memory card and can be reloaded at any time.
• Complex process sequences, which can be made up from several indi-
vidual methods or modes with additional auxiliary commands as re-
quired. In this way a large number of instruments can be controlled for
use in demanding analytical or synthesis units.
The practical 700 Dosinos are used as dosing instruments; they can be
conveniently operated with the functions and commands of the 711 Liquino.
Special functions (PREP, EMPTY) are available for preparatory work (i.e.
bubble-free filling and rinsing of the tubing) and emptying dosing units
when a reagent needs to be changed. In order to carry out these proce-
dures in as comfortable and reagent-saving manner as possible you can
define different types of dosing unit. As the length and diameter of the tub-
ing used can be defined the 711 Liquino is able to calculate and then use
the optimal volumes for the above-mentioned functions.
With the help of the special GLP mode the 711 Liquino can be used to vali-
date all your dosing units, i.e. to determine their accuracy. In this way GLP-
conform work can be ensured and also documented.
The dosing procedures in the GLP mode have been optimized and realized
for the 700 Dosino in such a way that meaningful characteristic values can
be determined; these allow detailed information about the accuracy of the
dosing cylinder to be obtained.
You can adapt the necessary limits for the assessment of the reliability of
the dosing accuracy yourself to suit your requirements. The limits recom-
mended by Metrohm are set as standard. We recommend that you use
these limits.