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3. Electrical conductivity
The method, which is not standardized, involves measuring the electrical resistance R across a cell immersed in the fluid, using an impedance bridge (conductivity meter). Electrical resistivity ρ is determined by the relationship
(7)
:
with :
- K :
-
cell constant
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Electrical conductivity
Aniline point
References
Standardization. Specifications
Association française de normalisation AFNOR
http://www. boutique.afnor.fr/
- Hydraulic transmissions – Fluids – Measurement of mineral oil filterability. Classification number : E48-690 - NF E 48-690 - 12-90
- Liquid petroleum products – Vapour pressure – Part 2: Determination of absolute vapour pressure (AVP)...
Hydraulic fluid analysis methods
Table 1 shows the equivalences between the various standards recommended by European and American standards bodies.
The numbers in the table refer to the comments below.
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