Reasons
- Proof of extraction efficiency
- Validation of new test methods
- OEM and customer requirements
- Securing reproducible results
Defining extraction parameters
Decay measurement according to VDA 19.1 and ISO 16232
Validation and proof of extraction efficiency for residual contamination analysis according to VDA 19.1, ISO 16232 and OEM and customer test requirements.
Extract repeatedly until hardly anything is left.
The decay measurement verifies extraction efficiency. Repeated extractions prove that the selected test method captures the particles on a component sufficiently and delivers reproducible results.
- 01
Extract the component with defined parameters and evaluate the filter.
- 02
Extract the same component again with the same parameters and evaluate.
- 03
Repeat until the amount of particles in the last extraction is small enough relative to the total. The criterion is set by the standard or customer specification.
- 04
Document the parameters and define them for series testing.
Why is a decay measurement required?
Typical applications
- New parts
- New assemblies
- Product changes
- New extraction methods
- Customer-specific requirements
- OEM approvals
How TecClean does it
Depending on component geometry, material, type of contamination and customer requirement, we develop suitable extraction methods and validate them by decay measurement. The results are documented and serve as the basis for future series testing.
What a decay measurement shows and what it does not.
It shows
that the selected extraction method captures the particles on this component sufficiently and delivers reproducible results.
It does not replace
the definition of limit values. Limit values come from your drawing, specification or customer requirement.
Accreditation
Methods developed in-house or customer-specific methods are not automatically part of the scope of accreditation. We tell you in advance what is accredited.
Scope of accreditationFAQ
Questions about decay measurement
What is a decay measurement?
In a decay measurement the same component is extracted several times with the same parameters and each extraction is evaluated separately. If the amount of particles found decreases sufficiently, the method captures the particles sufficiently. The applicable standard or customer specification defines the termination criterion.
When is a decay measurement necessary?
For new parts and assemblies, product changes, new extraction methods, customer-specific requirements and OEM approvals.
What do I receive as a result?
Documented extraction parameters that can be used as the basis for future series testing.
Do you need support with a decay measurement?
We support you in developing, validating and documenting suitable test methods according to VDA 19.1 and ISO 16232.