Total Dissolved Gas Content ( TDGC ) Gas Analysers Get latest price

The analysis is done in 2 steps which guarantee a very high selectivity and sensitivity in the determination of dissolved gases. 

• Step1. Gas separation by means of fully vacuum degassing ( accord. to DIN EN 60567, DIN IEC 599 and IEEE C57.104-1991) and display of results
• Step2 Option: Following the determination of the total gas content a gas chromatographic analysis can be made.

Both steps are synchronized via a micro-processor control thus a fast and reliable measurement procedure is guaranteed.

Features of This Product

• A newly invented vacuum degassing method (Patent pend. DE 102 52 652 4) de-gasses the oil sample periodically.
• After extraction through a 4 step vacuum pump the gases are dosed into vacuum chamber and separated.
• The gases are evacuated from the vacuum chamber with a vacuum pump; therefore a very high accuracy can be achieved.
• In and outlet of the oil sample as well as the switching valve are micro-processor controlled, a feedback of the oil into the transformer is possible.
• A linear pressure sensor measures the total gas content online which is a very important quality parameter for the characterization of the transformer load.
• The injection of the gas sample into the gas chromatograph is via a fixed mount and heated transfer pipe. An additional port for withdrawal of gas samples is installed.

Control and Evaluation

• The system is controlled by a micro-processor; a serial interface (RS 232) allows for transferring the data to a remote computer.
• The intervals of the analysis cycle can be freely defined by the operator (number of analysis/day or hour).
• The system has 8 additional analog inputs (0 -1 V) for the measurement of other transformer parameters (Oil temperature, winding temperature, ambient conditions etc.)
• The connection of these external sensors is through relay contacts (N/C or N/O,to be specified by the customer).

Display of results

• All results of the total gas content are displayed in Vol% and are stored in a databank.
• The results are displayed on the monitor, in a spreadsheet and in a printed report.
• All these data can also be transferred and displayed on a remote computer.
• All data is continuously stored in a measurement file.
• The results are stored together with all measurement parameters in a log file.
• The history of the stored data starts with the day of commissioning and covers several years.