Revolving table for preparing samples for DGA analysis

The Revolving Table is a tool designed to improve the preparation steps for insulating oil samples destined for Dissolved Gas Analysis (DGA) with the gas chromatography technique in the head space. Developed and validated by Sea Marconi in 1999, the revolving table is currently being used successfully in many laboratories internationally for everyday work.

The tool essentially consists of a rotating drum fitted with 28 spaces for vials with 20 ml head space, lined up with hermetic closures.

Sea Marconi’s revolving table permits up to 28 vials to be placed under inert gas (Argon) with a controlled flow, so that the oil sample remains uncontaminated by atmospheric elements (oxygen, nitrogen, CO2, moisture, dust, etc). The operational dose of the sample, the positioning of the stopper and the closure of the vial (always with inert gas) are quick and easy with the convenient central hand wheel and by the fact that the tool is made of transparent plexiglass.

It is used to prepare samples designated for dissolved gas analysis (DGA) through the head space (in oil or other liquid matrices) as well as water content in oil using the Karl Fischer technique with extraction in a stream of nitrogen.

The system operates in a controlled environment to take and repeat samples due to; the identification of the tube, the monitoring of the internal pressure, the internal and external temperature of the system, and the controlled flow of inert gas (Argon).

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Strengths

Sample handling and dosing in a controlled inert atmosphere (Argon)
Semi-automatic vial lifting system
Vial closure system with electronic crimper
Limiting the interference from atmospheric gases
Preparing 50 samples per man hour (approximately)
Applicable to mineral insulating oils, synthetic insulating fluids, Askarels, and silicone insulating liquids
Can be used to prepare samples and store them pending analysis
The system is easy to repeat
Small dimensions
Conforms to IEC 60567:2011 “Oil-filled electrical equipment – Sampling of gases and analysis of free and dissolved gases – Guidance”
Significant performance improvement in terms of measurement limits

Technical and construction features

Revolving Table (28 vial)
  • Number of slots for vials: 28
  • Material: transparent plexiglass, Delrin, stainless steel parts AISI 304.
  • Size: Ø 410 mm, H 500 mm.
  • Weight: 10 Kg.

References

The Revolving Tables by Sea Marconi are actually used in:

ARGENTINA
AUSTRALIA
AUSTRIA
BELGIUM
BRAZIL
CANADA
CROATIA
EGYPT
FINLAND

FRANCE
GERMANY
ISRAEL
ITALY
LATVIA
NETHERLAND
NORWAY
PHILIPPINES
POLAND

PORTUGAL
SOUTH AFRICA
SWITZERLAND
SWEDEN
TURKEY
UNITED KINGDOM
USA

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