Although transformer oil is not easy to fuel oil, it is flammable liquid after all, and there is danger of ignition and explosion when it meets open fire.
Therefore, it is necessary to measure the flash point of electronic transformer oil.
The flash point is the low temperature at which the mixture of oil vapor and air meets an open flame and burns under prescribed conditions.
The flash points of oil products are divided into two kinds: open flash point and closed flash point. Since the electronic transformer oil is used in a closed tank, the closed flash point should be measured
The main testing instrument for transformer oil is automatic close-mouth flash point tester.
The main part of the instrument is a metal oil cup. The inner wall of the cup has a certain number of scale rings, which are placed in the heating chamber with an electric furnace plate at the bottom. The current of the furnace wire is controlled by a switch box.
The lid is made of double metal plate with holes and the upper layer can rotate automatically.
When heating, the holes of the two cover plates are staggered, so that the oil cup is in a closed state. When igniting, the upper cover plate rotates, and the holes of the two cover plates coincide. The igniter automatically probes into the orifice to ignite the mixed gas, and the temperature shown in the thermometer is the flash point.
The flash point detection of transformer oil can be measured by SH105B automatic closed-mouth flash point tester, which adopts micro-computer technology and large-screen LCD.
The instrument is heated according to the standard method, automatic lifting, automatic ventilation, automatic ignition, automatic display, automatic locking flash point value, automatic printing results.
After the completion of the test can be automatically cooled, the work process to achieve full automation.
It has the advantages of accurate measurement, good repeatability, stable performance and simple operation.
Widely used in electric power, petroleum, chemical industry, commodity inspection, scientific research and other departments.
Comply with ISO - 2719,ASTM D93, GB261-2008 standard
Apparatus needed for experiment
1.SH105B automatic closed-mouth flash point instrument, developed and produced by Shandong Shengtai Instrument Co., LTD.
2. Special cup for closed-mouth flash point
Experimental steps:
Preparation work
1. After unpacking the instrument, please count the accessories according to the packing list. If there is any damage, please contact our company.
2. The instrument should be handled vertically. The tilt Angle should not exceed 30 degrees along the height of the instrument.
3. Connect the power supply of the instrument to the socket with a capacity of 220V/10A or above, and pay attention to having a good grounding wire.
Ii. Experiment process
1. After the power is switched on, the measuring arm of the instrument will lift automatically to display the experimental interface.
Click "Start" and the test arm drops to start the test.
Click "Abort" to stop the test and the test arm rises.
The "Test Conditions" section shows the test setting conditions, including expected flash points, printer switch Settings, test criteria, etc.
The "Test Information" section shows the progress of the test.
In the test interface, click "self-check", "Set", "condition", "record" and other buttons to enter the corresponding functional interface.
2. Self-check interface
This interface can perform self-check operation on all parts of the instrument.
Click "Test arm", and the test arm assembly will rise;
Click again, and the test arm component drops.
Click "igniter" to light the highlight igniter;
Click again to extinguish the ignition.
Click "Stir" to start stirring;
Click again and close the stirring.
Click "Open the lid", start the lid skateboard to run, and automatically return to position.
Click "Printer" to start printer printing self-test. The printer will print simulated test results (not real measurement results) to verify whether the printer is working properly.
During the self-inspection of each component, the corresponding operation information will be displayed below it.
3. Interface setting
From this interface, expected flash point value and atmospheric pressure value can be set: Click "Expected Flash point" or "Change" after "atmospheric pressure" to enter the expected flash point or atmospheric pressure setting interface:
Expected flash point setting
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