Metrohm 862 Compact Titrosampler - Manual (Page 112)

7.2 Monotonic equivalence point titrations (MET) ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
102 ￭￭￭￭￭￭￭￭ 862 Compact Titrosampler
Note
Select the optimal titration rate when you are developing a new titra-
tion method. This parameter is suitable for virtually all titrations and
only needs adaptation in special cases.
The settings of the individual titration rates are listed in table 2, page
104.
Volume increment
This parameter is visible only when Titration rate = user.
Volume that is dosed in each dosing step. The choice of the correct vol-
ume increment is a basic requirement for achieving high accuracy. A good
guideline is 1/20 of the expected EP volume. For steep jumps the volume
increment should tend toward 1/100 and for flat jumps toward 1/10 of
the EP volume.
Small volume increments are used for determining blank values or with
very asymmetrical curves. The accuracy of the evaluation cannot be
increased by using smaller increments as the measured value alterations
between two measuring points are then of the same order of magnitude
as the noise.
Range 0.00005 ... 999.900 mL
Default value 0.10000 mL
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.