BS EN 61868:1999
Current
The latest, up-to-date edition.
Mineral insulating oils. Determination of kinematic viscosity at very low temperatures
Hardcopy , PDF
English
15-04-1999
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.
| Committee |
GEL/10
|
| DevelopmentNote |
Supersedes 96/202845 DC. Also numbered as IEC 61868. (09/2005)
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| NBN EN 61868 : 1999 | Identical |
| I.S. EN 61868:1999 | Identical |
| DIN EN 61868:1999-12 | Identical |
| EN 61868:1999 | Identical |
| NF EN 61868 : 1999 | Identical |
| UNE-EN 61868:1999 | Identical |
| ISO 3105:1994 | Glass capillary kinematic viscometers — Specifications and operating instructions |
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