LABEC M-TIT-5 - Manual (Page 24)

including potential, volume and differential, etc. On the bottom of right corner is end point area that
displays number of end point and corresponding end point value.
From here user is allowed to store titration curve, print titration result, print titration data, print
titration curve, view titration parameter and time, set or cancel end point. If titration has end point,
user is also allowed to generate special panel and calculate the concentration value of sample.
(please see ‘Settling of titration data’ for detailed operation.)
Before next titration, current titration data will be stored. User can press ‘View’ button in menu
under starting status, select ‘View current data’ and then press ’Enter’ button to enter again.
NOTE: While making pre-titration, please pay attention to the following:
1. When making low jump titration, the user must select jump "large, middle, small" to "small",
otherwise, the meter won't be able to find titration end point.
2. While making pre-titration, when the meter has found titration end point, the user should press
‘Stop’ button to stop titration, because the meter won't stop titration automatically even if it has
found titration end point.
3. Before pH titration, please calibrate the electrode first (see "electrode calibration" chapter).
7.2 If titration end point value is known, user can arrange titration with Preset End Point Titration
Mode. User only need to input number of end point, end point value (pH or potential value)
and pre-control point value (pre-control point is the transferring point from high speed
titration to low speed titration), then can start titration. At starting status, press ‘Titration’
button, select ‘Preset end point titration’ to enter into ‘Preset end point titration mode’,
displayed as follows:
Start titration stirring Resume set
First end point
Pre-control point: 500mV
End point: 300.0mV
Time delay: 10s
End point number 1
MV titration pH titration
Switch of pre-control value off
Value:
MV/pH titration
Pre-control set
Preset end point titration/Parameter Setting
Diag.33 Preset end point titration mode, parameter setting
Before Preset end point titration mode, user needs to set some parameter. Preset end point titration
mode has following parameter: mV/pH titration parameter, end point number parameter, pre-control
point parameter corresponding to each end point, end point parameter, time delay parameter,
pre-control switch and value parameter.
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