I.S. EN 61868:1999
Current
The latest, up-to-date edition.
MINERAL INSULATING OILS - DETERMINATION OF KINEMATIC VISCOSITY AT VERY LOW TEMPERATURES
12-01-2013
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
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 |
For CENELEC adoptions of IEC publications, please check www.iec.ch to be sure that you have any corrigenda that may apply. (01/2017)
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| DocumentType |
Standard
|
| PublisherName |
National Standards Authority of Ireland
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| Status |
Current
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| Standards | Relationship |
| IEC 61868:1998 | Identical |
| NBN EN 61868 : 1999 | Identical |
| BS EN 61868:1999 | Identical |
| SN EN 61868 : 1999 | Identical |
| DIN EN 61868 : 1999 | Identical |
| UNE-EN 61868:1999 | Identical |
| EN 61868:1999 | Identical |
| NF EN 61868 : 1999 | Identical |
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