Metrohm 736 GP Titrino User manual

736 GP Titrino, Short instructions for use
CH-9101 Herisau/Switzerland
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736 GP Titrino
Short instructions for use
8.736.1023
95.12 Ti/pr

736 GP Titrino, Short instructions for use
Table of contents
Page
1. Getting started ........................................................................1
1.1 Principle of data input .........................................................1
1.2 Development of a method...................................................3
1.3 Storing methods .................................................................7
1.4 Working with several dosing units.....................................10
2. Titration, dosing and measuring modes .............................12
2.1 Survey of the titration modes ............................................12
2.2 Mode DET and MET, parameters .....................................14
2.3 Mode SET, parameters.....................................................15
2.4 Mode KFT, parameters.....................................................16
2.5 Mode STAT, parameters ..................................................17
2.6 Mode DOS, parameters....................................................19
2.7 Mode DOC, parameters....................................................20
2.8 Mode MEAS and CAL, parameters...................................21
2.9 Mode TIP, parameters......................................................22
2.10 Calculations ....................................................................23
3. Other functions .....................................................................25
3.1 Method memory................................................................25
3.2 Sample data, keys <smpl data> and <silo> ......................27
3.3 Configuration, key <configuration> ...................................28
Index ..........................................................................................29

1.1 Principle of data input
736 GP Titrino: Getting started 1
1 Getting started
This is a step by step introduction into the operation of the
Titrino.
You learn how to go round with the Titrino and you get an
idea of the possibilities that the Titrino offers you.
1.1 Principle of data input
Entering data, setting the dialog languageEntering data, setting the dialog language
<configuration>
<enter>
<select>
<enter>
2 x <QUIT>
Press <STOP> if the Titrino is busy. It is now in the inactive
standby state. Then press the <configuration> key. The dis-
play shows:
This is the title of the inquiry group "peripheral units". This
group contains various inquiries about peripheral units.
Press the <configuration> key once more. You see the title of
a new group of inquiries:
This is the title of the "auxiliaries" group. This group contains
the inquiry for the dialog language. Note the ">" sign. All titles
are prefixed by this sign.
Pressing the <enter> key takes you to the different inquiries of
the group "auxiliaries". The display shows
This is the selection of the dialog language. You select the
various dialog languages with the <select> key. Note the ‘’:’’
sign after the word "dialog". It appears if the values can be
selected with key <select>. Press <select> repeatedly until
"english" appears in the display.
Accept the new "value" with <enter> and the next inquiry ap-
pears.
Other inquiries of the "auxiliaries" group are not of interest at
the moment. Exit the inquiries with <QUIT>. Press <QUIT>
once again to exit the inquiries of the <configuration> key.
date 1997-12-16
dialog: deutsch
dialog: english
>peripheral units
>auxiliaries

1.1 Principle of data input
736 GP Titrino: Getting started
2
Summary of the most important signsSummary of the most important signs
Signs in the Titrino dialog:
>Title of inquiry groups, e.g. ">auxiliaries"
:Values can be chosen by the key <select>, e.g.
"dialog:"
Signs that are used in the instructions for use
<> sign for "key", e.g. <select>

1.2 Development of a method
736 GP Titrino: Getting started 3
1.2 Development of a method
You learn how to elaborate a method .
First you select a titration mode. A general survey of the dif-
ferent titration modes is given on page 12.
Selecting the modeSelecting the mode
<mode>
<enter>
<select>
<enter>
Press <mode> repeatedly until "DET" appears in the display.
DET stands for Dynamic Equivalence point Titration. In this
titration, the size of the volume increments vary as a function
of the slope of the titration curve. After each increment, a pre-
set measured value drift (or time) is awaited until the next
increment is added (so called "equilibrium titration"). After the
titration, the equivalence points are evaluated automatically.
Confirm "DET" with <enter>.
Now select the measured quantity: Press <select> until "pH"
appears in the display.
Confirm the measured quantity "pH" with <enter>.
You are now ready to titrate.
For the titration, you need an Exchange Unit with NaOH,
c=0.1 mol/L. If you have not yet prepared an Exchange Unit,
see page 188 ff of the Instructions for Use.
Plug a combined pH glass electrode into measuring input
("Ind I").
Pipette 2 mL HCI, c =0.1 mol/L into the titration vessel, dilute
it with ca. 20 mL. dist. water, adjust the stirrer and press
<START>.
During the titration, the first line of the display shows the cur-
rent measured value and the volume already dispensed:
As soon as the instrument has found an equivalence point,
this is shown on the second line:
Let the titration continue for a short while, e.g. until ca.
pH=11.50. Now stop it with <STOP>.
The second line shows the equivalence point found, e.g.:
If more than one equivalence point has been found, the sec-
ond equivalence point can be viewed with <enter>
DET pH D0a ********
DET: pH
DET: U
mode DET
pH 2.78 0.351 ml
EP1
EP1 2.083 ml pH 7.64