Maintenance
When used correctly, variable area flow meters from Vögtlin Instruments AG do not require any
maintenance.
Soiling
The following symptoms indicate soiling:
The set value can no longer be reached – the control valve is probably soiled
The measuring value rises although the actual flow rate has not been changed – measuring
cylinder is soiled
Colour change / deposits in the measuring cylinder
Cleaning
Depending on the type of soiling, the measuring instrument can be rinsed with isopropyl alcohol
(IPA). The measuring cylinder can be mechanically cleaned with a brush at the most.
If soiled, we recommend that you return the measuring instrument to your distribution
partner.
Return
When returning, please use the original packaging if possible or suitable alternative packaging. We
do not accept responsibility for damage in transit. Please inform us of the reason for return: this
enables us to process your request quickly.
Note
If the instrument has been in contact with corrosive or toxic media it is imperative to clean it
properly before return. Please always complete the contamination declaration form. This is
provided in the appendix to this manual.
Instruments which we receive without a contamination declaration form will unfortunately have to
be returned to the sender.
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