Maintenance And Care Of The Titroline ® 7500 Kf - SI Analytics TitroLine 7500 KF Mode D'emploi

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8 Maintenance and Care of the TitroLine
The preservation of the proper functioning of the piston burette requires testing and maintenance work to be
performed on a regular basis.
Regular inspections are essential prerequisites for the correctness of the volume and the proper functioning of
the piston burette.
The accuracy of the volume is determined by all chemicals-carrying components (piston, cylinder, valve,
titration tip and hoses). These parts are subject to wear and tear, i.e. zthey are or wearing parts, respectively.
The piston and cylinder are subject to particular strain, hence they require special attention.
Heavy strain:
Use of e.g. concentrated solutions, reagents and chemicals (> 0.5 mol/L); chemicals attacking glass, such as
fluorides, phosphates, alkali solutions; solutions with a tendency to crystallising out; Fe (III) chloride solutions;
oxidising and corroding solutions such as iodine, potassium permanganate, Cer (III), Karl-Fischer titration
agent, HCl; solutions with a viscosity of > 5 mm
Normal strain:
Use of solutions, reagents and chemicals (up to 0.5 mol/l) which do not attack glass, crystalize out or corrode.
Interrupted use :
If the dosing system is not in use for more than two weeks, we recommend emptying and cleaning the dosing
unit [6]. This applies in particular under the operating conditions referred to in the „Heavy strain" section. If this
recommendation is not adhered to, the piston of the valve may become leaking, this may result in damage to
the piston burette.
If the liquid is left within the system, you will also have to reckon with corrosion and an alteration of the
solutions used over time, which includes e.g. crystallisation. Considering that as of the state of the art there
are no plastic hoses available for the use in titration equipment which would be perfectly free of diffusion
phenomena, particular attention is to be paid to the range of the hose lines.
We recommend the following inspection and maintenance work
Simple cleaning:

Wiping off splashed chemicals from the outer surface. [1]
Sight check:

Check for leakage in the area of the dosing system. [2]

Is the piston tight? [3]

Is the valve tight? [4]

Titration to clear? [5]
Basic cleaning of the dosing system:

All parts of the dosing system to be cleaned separately. [6]
Technical inspection:

Check for air bubbles in the dosing system. [7]

Visual inspection

Check of the electrical connections. [8]
Verification of the volume according to ISO 8655:

Perform basic cleaning

Inspection according to ISO 8655 Part 6 or Part 7. [9]
Chapter 8 – Maintenance and Care of the TitroLine
2
/s; frequent, or even daily use.
®
7500 KF
®
7500 KF
Heavy strain
Whenever required in
operation
Weekly, when putting
back into operation
Every three months
Semi-annually when
putting back into
operation
Semi-annually
Normal strain
Whenever required in
operation
Monthly, when putting
back into operation
Whenever necessary
Semi-annually when
putting back into
operation
Annually