Dissolved Gas Measuring Device

How to choose Insulating Oil Testers

Points to check when selecting, with the values for this product (SGM-200P).

1. 1. Select a test method that suits the purpose

   Breakdown voltage testing evaluates the dielectric performance of the oil itself, dissolved gas analysis detects signs of overheating or discharge inside the equipment, and acid value measurement tracks the progress of deterioration. Required equipment differs depending on what needs to be judged, so confirm the method against the inspection plan.

2. 2. Check compliant standards and electrode conditions

   Breakdown voltage is specified by standards such as JIS C 2101 and IEC 60156, which define electrode shape, gap and voltage rise rate. Measured values cannot be compared if conditions differ, so confirm that the instrument complies with the standard used in your internal criteria or historical data.

3. 3. Confirm sufficient maximum test voltage

   With breakdown voltage testers, if the maximum test voltage is lower than the breakdown voltage of the oil being tested, breakdown cannot be induced and no measurement is possible. New or good-quality oils have higher breakdown voltages, so select a model whose maximum voltage exceeds the expected value for the oil.

4. 4. Check the number of gas types that can be analyzed

   Dissolved gas analysis estimates the type of abnormality from the ratios of gas composition, such as hydrogen, hydrocarbons and carbon monoxide. Some listed products can analyze 11 gas types; confirm that all gases required by the diagnostic method you adopt can be measured.

5. 5. Measurement range and required oil sample volume

   Confirm that the measurement ranges for gas concentration (ppm) and voltage include the judgment criteria values. Also check the oil sample volume required per measurement and determine whether it matches the amount that can be collected from the equipment and the number of repeat measurements needed.

6. 6. Prioritize portability for on-site measurement

   For measurements at power plants or substations, confirm that mass, external dimensions, power supply conditions and operating temperature range are workable on site. For laboratories handling many samples, prioritize recording functions such as data processing, printer and USB output.

This guide was written by AI based on the listed products' documents and specification items.

About Insulating Oil Testers and all products

Description

A compact, lightweight dissolved gas measuring device suitable for use on-site and in workshops.

FAQ

Q. What types of oil can the SGM-200P measure dissolved gas in?

A. It is a device that measures the amount of dissolved gas in transformer oil and cable oil.

Q. In what locations is the SGM-200P suitable for use?

A. It has a compact, lightweight design suitable for use on-site and in workshops. Applications include on-site transformer oil measurement and measurement in workshops.

Written by AI based on the content of the source documents.

Source documents

• Catalog SANMI 製品カタログ 12 pages Open page 7
  Found on: https://sanmi.co.jp/en/download/