Maintenance And Care Of The Device And The Viscometers; Maintenance Work To Be Carried Out; Wartung Und Pflege Der Absorberfläschchen Vz 7215; Periods Without Operation - Xylem SI Analytics AVS 370 Manual De Instrucciones

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Maintenance and care of the device and the viscometers

Maintaining the proper functioning requires certain inspection and maintenance work.
Maintenance and service work includes:
- Visual check
- Interface function, ViscoPump II, and rinsing burettes
- Once per quarter, the electrical contacts have to be inspected for corrosion, if the viscosity
measuring unit is used in premises with an occasional occurrence of corrosive matters in their
atmosphere.
Maintenance intervals
Normal operation
Under particular strain
In case of disturbances
5.1

Maintenance work to be carried out

- Check the hoses, screwed connections for signs of visible damage, contamination, and leaks.
- Check the electrical plug contacts for corrosion and mechanical damage (on the device and
on the cables).
- If necessary, the exterior of the casing of the viscosity measuring unit can be cleaned with a
piece of cloth soaked with a household cleaning agent. The lower and rear sections have to
be dry-treated.
- In no case must liquid penetrate into the interior of the lower section.
- Defective parts must be repaired or replaced with new ones.
- Defective glass parts must always be replaced.
5.2 Wartung und Pflege der Absorberfläschchen VZ 7215
The VZ 7215 absorption traps which prevent contaminations from penetrating into the pneumatic
system of the ViscoPump have to be inspected at regular intervals.
The measurements will not work if there is an incorrect connection!
There is a risk of the sample leaking from the viscosimeter or being suctioned into the ViscoPump II.
If sodium lime is used acidic solvents as an absorption agent, the colour condition of the
indicator is to be checked on a daily basis.

As soon as this condition has shifted to BLUE in the half of the absorber material, this is the
very last moment to replace the material for safety reasons.

If such a colour shift cannot be observed over an extended period of time, this may be
attributable to the fact that an acidic over-saturation of the material has caused a
de-colouration; this may then appear as "normal", but it will definitely result in the destruction
of the pneumatic system after some time.

This situation is explicitly excluded from the warranty coverage!
When using activated carbon as an absorption agent (e.g. with solvents or used mineral oils),
a replacement should be made monthly. This depends on the load factor which, in turn, is a function of
the volatility of the materials
5.3

Periods without operation

If the capillary viscometers are not used over a long period of time, the liquids contained in the system,
in particular aggressive solutions, have to be drained. If the liquid is left in the system, one has to
reckon that the solutions used will alter in the course of time and attack the glass, in particular the
capillaries.
Cleaning agents should be matched to the previous samples or impurities! In many cases,
an aqueous cleaning agent (glass cleaners, detergents) or organic solvents (such as acetone or
hydrocarbons) are sufficient.
intervals for carrying out all work is 6 months
the max. intervals for carrying out all maintenance work are 4 weeks
the work has to be carried out immediately