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NF EN 61868 : 1999

Current
Current

The latest, up-to-date edition.

MINERAL INSULATING OILS - DETERMINATION OF KINEMATIC VISCOSITY AT VERY LOW TEMPERATURES
Published date

01-12-2013

Introduction
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Apparatus
6 Calibration
7 Procedure
8 Expression of results
Figure 1 - Viscometer bath and accessories

Defines a procedure for the determination of the kinematic viscosity of mineral insulating oils, both transparent and opaque, at very low temperatures, after a cold soaking period of at least 20 h, by measuring the time for a volume of liquid to flow under gravity through a calibrated glass capillary viscometer. Applicable at all temperatures to both non-Newtonian and Newtonian liquids having viscosities of up to 20 000 mm2 x s-1. Suitable for the measurement of the kinematic viscosity of liquids for use in cold climates, at very low temperatures (-40 or at temperatures between the cloud and pour-point temperatures (typically -20C) where some liquids may develop unexpectedly high viscosities under cold soak conditions.

DevelopmentNote
INDICE DE CLASSEMENT C27115
DocumentType
Standard
PublisherName
Association Francaise de Normalisation
Status
Current

Standards Relationship
IEC 61868:1998 Identical
NBN EN 61868 : 1999 Identical
BS EN 61868:1999 Identical
I.S. EN 61868:1999 Identical
SN EN 61868 : 1999 Identical
DIN EN 61868 : 1999 Identical
UNE-EN 61868:1999 Identical
EN 61868:1999 Identical

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