Revolving table for preparation of sample for DGA analysis

Wednesday March 22nd, 2017

Revolving Table is a tool designed to optimize and simplify the preparation of insulating oil samples for the analysis of Dissolved Gases (DGA) with the headspace gas chromatography technique. Developed and validated by Sea Marconi since 1999, the Revolving Table is currently used with satisfaction by numerous laboratories on an international scale for routine work.

The instrument is essentially composed of a rotating drum equipped with 28 seats for 20 ml headspace vials, combined with the relative hermetic closure cap.

Revolving table allows to condition up to 28 vials (vials) under inert gas (Argon) with controlled flow, and to introduce the oil sample without atmospheric contamination (oxygen, nitrogen, CO2, humidity, dust, etc.). The operations of dosing the sample, positioning the sealing cap and closing the vial (always under inert gas) are made easy and fast by the electronic crimper and the transparent plexiglass that facilitates every operation.

It is applied for the preparation of samples intended for the determination of dissolved gases (DGA) by means of headspace (in oil or other liquid matrix) and water in oil with Karl Fischer technique with nitrogen current extraction.

The system operates in a controlled regime for the use and repetitiveness of sample preparation thanks to the identification of the test tube, the monitoring of the internal pressure, the internal and external temperature of the system and thanks to the control of the inert gas flow (Argon).

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Strengths

manipulation and dosage of the sample in a controlled inert atmosphere (Argon)
semi-automatic vial lifting system
vial closure system with electronic crimper
limitation of interference due to atmospheric gases
preparation of 50 samples in one man-hour (approx.)
applicability on mineral insulating oils, synthetic insulating liquids, Askarels, silicone insulating liquids
possibility of preparing samples and storing them awaiting instrumental analysis
high repeatability of the system
small size
According 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 quantification limits

Technical and construction features

Revolving Table (28 vial)
  • Number of spaces for vials: 28
  • Material: transparent plexiglass, delrin, parts in AISI 304 stainless steel
  • Size: Ø 430 mm, h. 500 mm
  • Weight: 10 Kg

Referenze

The Revolving Table Sea Marconi are currently working in:

FRANCE
GERMANY
ISRAEL
ITALY
LATVIA
MALAYSIA
NETHERLAND
NORWAY
PHILIPPINES
POLAND

PORTUGAL
QATAR
SAUDI ARABIA
SOUTH AFRICA
SOUTH KOREA
SWITZERLAND
SWEDEN
TURKEY
UAE
UNITED KINGDOM
URUGUAY
USA

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