Bartec HYGROPHIL H 4230-10 A Series, Руководство по эксплуатации

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Maintenance
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Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
6.3 Measuring chamber
6.3.1 Cleaning interval
The time interval for cleaning the measuring chamber essentially depends
on the conditions of use.
In extreme cases, the type and quantity of dirt in the air to be measured may
make cleaning necessary every four weeks.
If the air flow rate displayed is too low, it is necessary not only to check the
compressed air supply and clean the filter but also to check the measuring
chamber and clean it where necessary.
Regardless of the dirt that occurs, thorough maintenance should be carried
out once a year. In addition to checking the hoses and seals, this should
also include checking and cleaning the measuring chamber.
6.3.2 Types of dirt
The measuring chamber may be contaminated in particular by the following
types of dirt:
● Oils and grease
Due to the high temperature of the air to be measured, these substances are
often present in a gaseous state and are therefore able to pass through the
filter. In the cooler measuring chamber they condense and, after a certain
amount of time, form a layer that may block the air ducts. This can be
delayed considerably by adding the surfactant correctly. Despite this,
evaporation in the measuring cell is not prevented; the surface of the water
remains free of oil and grease thanks to the self-cleaning effect.
● Tar
Tar is a fairly problematic form of contamination as the self-cleaning effect
does not work fully in this case. The equipment must be cleaned using
suitable solvents.
● Dust
Dust that is not dissolved by water is deposited on the bottom of the
measuring cell. The measuring cell fills with sludge and, after some time, the
correct humid temperature can no longer be formed.
Water-soluble substances and gases that form compounds with water (such
as sulphur dioxide) do not disrupt the evaporation. Measurement errors
remain within the guaranteed accuracy range.
In order to inspect and clean the measuring chamber and to exchange
hoses, seals or sensors it is necessary to disassemble and dismantle the
measuring chamber.