NBN EN 50353 : 2001
Current
The latest, up-to-date edition.
INSULATING OIL - DETERMINATION OF FIBRE CONTAMINATION BY THE COUNTING METHOD USING A MICROSCOPE
12-01-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Cleaning procedure
8 Sampling
9 Filtration procedure
10 Microscope calibration
11 Fibre counting and expression of results
12 Calculation and expression of results
13 Precision
14 Test report
Figure 1 - Schematic representation of a suitable
filtration apparatus
Annex A (normative) - Method for low fibre concentrations
A.1 Reagents
A.2 Apparatus
A.3 Initial set-up and cleaning
A.4 Sampling, and filtration of oil sample
A.5 Blank tests
A.6 Counting method
A.7 Calculation and expression of results
A.8 Precision
A.9 Test report
Figure A.1 - Schematic representation of a suitable
filtration apparatus for low fibre
concentrations
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