LABEC M-TIT-5 - Manual (Page 20)

7.1.1 mV/pH Titration Parameter
mV/pH titration parameter is used to indicate the titration is mV titration or pH titration.
When user select mV titration, the current titration is mV titration, all displayed parameter are
according to mV and vice versa.
7.1.2 Balance Potential Parameter
The process of pre-titration mode is: Firstly meter will add certain amount of titrant, when
adding finish, meter sampling the potential value, then calculate the amount to add for next
time according to potential changing value between before adding and after adding. Adding
again, sampling, calculating and repeat like this till titration finished. After titrant added,
meter will sampling the potential after adding and calculate the amount to add for next time,
so the potential sampling is very important. The meter allow user to set potential balance
range which is also called potential changing range. When titration started, the meter will
judge, sampling current potential, if the change of current potential satisfy the balance
potential set by user, this potential is valuable, otherwise the meter will keep on waiting till
the potential is satisfied. Of cause, meter allows user to switch off the judgment of balance
potential.
7.1.3 Balance Time Parameter
Same as balance potential parameter, balance time parameter is also used to control the
potential sampling after adding titrant. When potential varies big and cannot satisfy the
balance condition, it is necessary to use time parameter to limit, otherwise the meter will
always wait for the balance of potential. The meter allows user to set balance time i.e. if
potential cannot balance, the meter can still continue titration when set balance time is up. So
if potential satisfy balance potential condition first, balance time condition will be invalid;
when user switch off balance potential parameter, the meter will take balance time parameter
as valuable (user is not able to switch off Balance Time Parameter and Balance Potential
Parameter as the same time); vice versa.
7.1.4 Minimal Volume Parameter
User is allowed to set minimal adding volume, usually is 0.02mL
7.1.5 End Point Jump Value Parameter
End point jump value is the final basis for meter to judge the end point, it is divided into three
grades: large, middle and small, user only need to select large/middle/small and no need to set
specific jump value. If user observes that end point jump of titration is somewhat low or noise
is too large, with the result that titration end point is difficult to find, we suggest that user
reset this part of parameter (set end point jump to "small" if end point jump is low, and set
end point jump to "middle" or "large" if noise is large).
In order to satisfy the requirement of multi-end point titration, the meter allows five end
points at most in any titration. There are five independent controlled values corresponding to
five end points. The controlled value can be set to be large or small independently. It is
impossible that various titration to have the united mode or method. In consideration of
demand of general users, we divide end point jump into three grades that is large end point
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