ASTM D [ Withdrawn ]. Standard Practice for Sampling Insulating Liquids for Gas Analysis and Determination of Water Content. For complete instructions on sampling electrical insulating fluids for GAS ANALYSIS and determination of water content refer to ASTM D Adjust flow. electric equipment, are detailed in the Doble Reference Book on Insulating Liquids and Gases , ASTM Practices. D  and D . GOOD SAMPLE.
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Test Method D, Table 1, provides coefficients of variation for different gas-in-oil analysis from samples collected in the three containers recommended in this practice.
Transformer Oil Gas Analyser (TOGA)
Drain at least 1. If any sound is heard,the astk should be drained and the sampling repeated. Preparation for Sampling 6. It isdesirable that stainless steel cylinders be evacuated and sealedafter cleaning.
However, gas-saturated samples will begin to release gases bubbles soon after sampling. Remove the security pipe plug fromthe drain valve.
Attach oil-resistant tubing to the sample port on the xstm valve and flush at least one more quart of fluid into the flush-oil container before collecting the fluid in the sample container. A large variancefrom normal should be considered when evaluating the testresults obtained when the syringe conditioning was not used.
If the slug moves towardsthe electrical apparatus, a negative pressure exists. One of twoprocedures may wstm be used to prepare the sample outlet. Immediately close the port to thesyringe Fig. Cleaning of Apparatus 5. Cleaning thetubing should be considered impractical. Wipe the inside of the valve and threads with a clean lint free cloth.
However, gas-saturated samples will begin to release gases bubbles soon after sampling. Do not release any evolved gases bubbles since these gases must be included in the dissolved gas analysis. When thedrying period has expired, syringe pistons shall be placed intheir barrels, valves closed; stainless steel cylinder valvesshould be closed; or cans sealed with their screw cap.
Transformer Oil Gas Analyser (TOGA)
Last previous edition D — To the running of this website, we need your help to support us. Install the drain valve security plug. A number in parentheses indicates the year of last reapproval.
The filled syringe should contain no air. Flush the valve at installed sample adapter, flushing at least one d613 quart of fluid into the d6313 oil container before collecting sample. Samples should be forwardedto the laboratory as quickly as possible.
Attach the plastic tube tothe syringe as shown in Fig. Package the filled syringe as soon as possible to protect the sample from light.
Samples can be obtained safely. Current edition approved April 10, To minimizewaste and potential spills a length of 60 cm 24 in. If air is present, discharge oil with the syringevertical stopcock up and obtain another sample.
Collecting Samples Using Syringe 8. Power by seonoco All Rights Reserved: Connectthe oil-resistant tubing to the lower valve port on the steelcylinder and connect a short piece approximately 60 cm 24in.
With all three valves openand the cylinder held in a vertical position see Fig.
Originallypublished as D — While observing the slug of insulating fluid, slowly crack the sample outlet valve open. Close thestopcock, with the handle toward the syringe. Do not pull thepiston manually since this can result s3613 bubble formation. Install the drain valve security plug.
Do not allow the oil to be exposed tosunlight. We are nonprofit website to share and download documents.
Samples can beobtained safely.