LABEC M-TIT-5 - Manual (Page 15)

d. If the meter links up with computer, use computer → TIT-5 Automatic potential Titrator
special connection line (35) to connect hole style socket with RS232 socket on computer.
Separately connect the needle style socket to ‘Titration Socket/RS232’ (21) under volume
titration unit and ‘Measuring socket/Rs232’ (32) under potential measuring unit.
e. Insert T-818-B-6 temperature sensor (40) joint into ‘Temperature Sensor socket’ (28) under
pH/mV measuring unit. Insert E-201-C-9 pH combination electrode (37) into ‘measuring
electrode socket’ (27) under potential measuring unit. When measuring electrode and
reference electrode is used, please insert measuring electrode into ‘Measuring electrode
socket’ (27) under potential measuring unit and insert reference electrode into ‘reference
electrode pole’ (29) under potential measuring unit. Now the meter is ready to use.
2. Functions of the meter
The main titration modes of the meter contain pre-titration, preset end point titration, mode
titration and manual titration. Different electrodes can be fitted with the meter to make different
titration, such as: acid and alkali titration, oxidation-reduction titration, complex titration,
non-water titration and permanent pH measuring etc. The above titrations are generated into
special titration modes. The meter can be controlled by computer. Titration curve, titration curves
of one step and two steps derivative are instantly displayed on computer.
3. Mode of Titration
 Pre-titration: pre-titration is one of the main titration modes of the meter, many modes titration
are generated from pre-titration mode. The meter is able to find titration end point through
pre-titration mode, thus special titration mode is generated.
NOTE: The end point jump parameter of pre-titration mode is classified into: large, middle,
small, the default value of this parameter is set "middle". If it has reaction to low end point
jump, the users must set this parameter to "small" (see 6.7 setup of pre-titration parameter in
detail.)
 Preset end point titration: If users know the titration end point value of pH or potential, preset
end point titration function is available. Input end point number, end point pH or potential
value and pre-controlled point value (pre-controlled point is transferring point from high speed
titration to low speed titration), you can begin titration.
 Mode titration: The meter provides two kinds of special mode titration.
a. HCl NaON (0.1 mol/L)
b. K
2
Cr
2
O
7
Fe
2
(0.1 mol/L)
The rest mode titration is to be generated with pre-titration by users. Users will get titration
parameter after pre-titration, press "Mode" button, store this parameter in the meter, special
titration mode is thus generated. Titration can be done later only if this mode is down loaded
(see 8.12 "Generation of mode" for detail)
 Manual Titration: Set added volume to make manual titration. This titration mode will help
users find titration end point.
 Blank Titration: This mode is suitable for the titration which demands less titrant (below 1m1).
In this mode, every time the meter adds 0.02 ml of volume (users can amend this parameter),
users can also set pre-added volume parameter so as to make titration speed higher. Thus the
meter will automatically search for titration end point to generate special titration mode
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