The Automatic Filter Analysis System of JOMESA:
Cleanliness Analysis, Measurement Process, The patented Metal-Nonmetal recognition, Evaluation Samples, Oil Cleanliness

JOMESA HFD: Measurement Process


Microcopic analysis starts with the filtermembrane, which has to be placed onto the analyzing system.
There are 3 basic type of filterholders:





Filterholder with glass cover:
Analyzing and only electronic archiving

Filter-mounts:
Analyzing, electronic archiving and physical archiving

Drum stretch filterholder:
Analyzing, electronic archiving and postprocessing (SEM/EDS)







As required by ISO 16232 the filter is scanned by a motorized scanning stage.





JOMESA HFD has 2 outstanding features in the scanning process.

1: The individual images are composed into a complete membrane image.
This image is stored in a database.
Thus the filter can be evaluated at any later time again.

2: JOMESA is the only system which is capable of evaluation an exact circle area (red circle left).

Scanning the filtermembrane

Composing into a complete membrane image





After scanning and storing evaluation starts.
The first step in evaluation is brightness equalization.

This unique JOMESA feature implies:
1: Even inhomogeneous filter like the one shown left, can be evaluated.

2: The brightness threshold for particle detection is the same for all filters. No manual threshold adjustment neccessary.



Particle threshold is set then according to VDA Vol. 19.1 / ISO 16232:2018 (70% relative to histogram maximum).