TC16 ASTM D2440 Apparatus
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Tamson Instruments Specification sheet Oxidation Stability of Mineral Insulating Oil ASTM D2440 P/N apparatus ASTM D2440 230V/50-60Hz P/N apparatus ASTM D2440 115V/60Hz Reading Setting Bath volume For this test, a test specimen of mineral insulating oil is placed in an oil receptable together with a copper catalyst coil to simulate the ageing of the sample. The sample is in the bath at 110°C for 72 or 164 hours. During this time, oxygen is constantly bubbled through the sample. After this procedure, the oil is evaluated by measuring the amount of sludge and acids formed. Construction The Tamson ASTM D2440 apparatus consists of one liquid bath equipped with six sets of calibrated flowmeters and six sets of glassware. The flowmeters have a fine adjustable needle valve, to ensure the correct amount of oxygen is supplied. A dryer tower is also supplied and can be mounted on the side of the bath. The liquid bath is well insulated and all wetted parts are made from stainless steel to withstand high working temperatures. The stainless steel parts can easily be cleaned. Grommets around the openings protect the glassware from scratches. General The oxidation stability test of mineral transformer oils is a method for assessing the amount of sludge and acid formed in a transformer oil when the oil is tested under prescribed conditions. Good oxidation stability is necessary to improve the service life of the oil. Oils that meet the requirements tend to minimize electrical conduction, ensure acceptable heat transfer, and preserve system life. Bath depth Stainless steel bath Bath drain, overflow outlet Easy to operate Wide temperature range Small footprint Robust, complete for six tests Bath openings Used inside bath: stainless steel 304, brass The apparatus should be placed in a fume hood. In case this is not possible, six additional pieces of glassware can be used together with the standard supplied side brackets to prevent smell spreading into the laboratory. Accuracy The insulation of the bath and electronic controller with PID regulation result in a very stable working temperature of ± 0.02°C. The set point can be set in steps of 0.1°C in the range of 0°C up to 250°C (148..482°F). The readout is displayed in 0.1°C. The controller has an internal accuracy of 0.01°C. Temperature readout Standard available in C, on request in F. Pump When not used for oxidation tests, the pump can be used to circulate the bath content to an external application. Safety The bath conforms to CE regulation. It is further equipped with a mechanical resettable safety thermostat. A low liquid float is standard included and will switch-off the apparatus when the bath fluid is too low.

Tamson Instruments Specification sheet Oxidation Stability of Mineral Insulating Oil ASTM D2440 Table 1: Apparatus ASTM D2440 P/N 00T2060 or P/N 00T2061 consists of the following parts: P/N Picture Description Quantity 00T0671 Levelling platform with cover and lids for ASTM D2440 tests. Side brackets to hold glassware and drying tower are also included. Flowmeter, with fine adjustable needle valve Tubing silicon, 5 meter, 4 mm inside diamater. Hose barb fitting G1/4” to I.D. 5 mm Hose adapter 6mm O.D. to G1/4” quick fit Hose adapter T-shaped 6mm O.D. to G1/4” quick fit Gas drying tower, 75...

Tamson Instruments Specification sheet Oxidation Stability of Mineral Insulating Oil ASTM D2440 Bath fluid silicon oil 20..150°C 20 L Thermometer, solid stem, similar to ASTM 41C, white backed, 98+152:0,2°C, capillary tube specially coated inside, with non-wetting blue special liquid, immersion 100mm, max.400x6-8mm, durable pigment, with Works Certificate at +100°C Catalyst copper coil ext ∅ 16 mm, 50 mm height, pack of 10 pcs. Refilling for dryer (P/N 31T2044), 5 lbs, 8 mesh ASTM D2440 glassware (Oil receptable and head). Six additional pieces are recommended to filter smelly oxygen if...