29.2 Monotonic equivalence point titrations (MET)
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300
￭￭￭￭￭￭￭￭
900 Touch Control
NOTICE
A constant measured value is often only reached after a certain time, as
mixing and the reaction itself require a certain time. The response time
of an electrode can also increase with time, i.e. reaching a constant
measured value takes longer and longer. Drift-controlled measured
value acceptance is particularly advisable in such cases, as the measured
values are only accepted when equilibrium has almost been reached.
Measuring mode pH, U and Ipol:
Input range
0.1 to 999.0 mV/min
Default value 50.0 mV/min
Selection off
off
Measured value acceptance will take place after the maximum waiting
time has elapsed. This can be useful when the titration reaction pro-
ceeds slowly or the electrode is slow to respond.
Measuring mode Upol:
Input range
0.01 to 99.90 µA/min
Default value 50.00 µA/min
Selection off
off
Measured value acceptance will take place after the maximum waiting
time has elapsed. This can be useful when the titration reaction pro-
ceeds slowly or the electrode is slow to respond.
Min. waiting time
The measured value is not accepted until the minimum waiting time has
elapsed, even if the signal drift has already been reached. The minimum
waiting time is only important for drift-controlled measurements.
Input range 0 to 999999 s
Default value 0 s
Max. waiting time
If the signal drift has been switched off or has not yet been reached, then
the measured value will be accepted when the maximum waiting time has
elapsed. As default value, a suitable waiting time for the signal drift is
automatically calculated.
Input range 0 to 999999 s
Default value 26 s
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