Metrohm Titrando User Manual

2.6 Sensor connection
30 Titrando Installation Instructions
2.6.2 Differential potentiometry
During potentiometric measurements in poorly conducting media, high-
impedance measuring sensors are affected by electrostatic and elec-
tromagnetic interferences. Use our Solvotrode 6.0229.100 or any other
special electrode for pH measurements in organic solvents. If this does
not help then you can connect a Differential amplifier 6.5104.030
(230 V) or 6.5104.040 (115 V).
The Differential amplifier is connected to the high-impedance measur-
ing input (Ind.).
2.6.3 Titration vessel setup
In titration it is important that the solution is thoroughly mixed. The stir-
ring rate should be high enough for a small vortex to be formed. If the
stirring rate is too high then air bubbles will be entrained. This results in
incorrect measurements. If the stirring rate is too low then the solution
at the electrode will not be correctly mixed. To ensure that the meas-
urement is made in a thoroughly mixed solution after titrant addition the
buret tip should be located where the turbulence is greatest. In addi-
tion, the distance between the spot where the titrant is added and the
electrode should be as large as possible. When positioning the elec-
trode and buret tip you must also take the stirring direction into ac-
count.
1
2
3
Fig. 20: Recommended arrangement of magnetic stirring bar (1),
electrode (2) and buret tip (3)

Metrohm Titrando Specifications

General

mV Resolution	0.1 mV
Temperature Resolution	0.1 °C
Applications	Acid-base, redox, complexometric, precipitation, Karl Fischer titration
Measuring inputs	pH, mV, temperature
Stirrer control	Integrated stirrer control
Software	tiamo
Titration Methods	MET (Monotonic Equivalence Titration), SET (Fixed Equivalence Titration)
Dosing Resolution	Varies depending on the Dosing device used
Minimum Dosing Volume	Varies depending on the Dosing device used
pH Resolution	0.001
Interface	USB
Power Supply	100 – 240 V AC (depending on the model)
Dimensions	Varies depending on the model
Weight	Varies depending on the model