Metrohm 862 Compact Titrosampler - Manual (Page 98)

7.1 Dynamic equivalence point titrations (DET) ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
88 ￭￭￭￭￭￭￭￭ 862 Compact Titrosampler
￭ when the change of direction in the jumping range is very abrupt,
because otherwise it could easily happen that an excessively large vol-
ume will be dosed in the region of the equivalence point.
The value should not be less than 1/100 cylinder volume.
Range 0.1 ... 9999.9 µL
Selection off
Default value off
Note
It is not advisable to select similar volumes for the minimum and the
maximum increment. Monotonic equivalence point titration (MET) is
appropriate for these applications.
Dosing rate
This parameter is visible only when Titration rate = user.
Rate at which the volume increments are dosed. The maximum dosing
rate depends on the cylinder volume (see Chapter 10.1.1, page 139).
Range 0.01 ... 166.00 mL/min
Selection max.
Default value max.
Signal drift
This parameter is visible only when Titration rate = user.
Maximum permissible drift for the measured value acceptance, i.e. maxi-
mum change of the measured value per minute. This type of titration is
often referred to as equilibrium titration.
Note
A constant measured value is often only achieved 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 con-
stant measured value takes longer and longer. Drift-controlled meas-
ured value acceptance is particularly advisable in such cases, as the
measured values are only accepted when equilibrium has almost been
achieved.
Measuring mode pH, U and Ipol:
Range
0.1 ... 999.0 mV/min
Default value 50.0 mV/min