Operation Steps of F248 High Temperature Limit Oxygen Index Tester

F248 high temperature limit oxygen index tester is a testing equipment independently developed and produced by our company Qisnun Precision Mechanical and Electrical Technology Co., Ltd. It is cost effective and can determine the oxygen index at a temperature of up to 400°C. It is an extension of the normal temperature oxygen index and can be used to measure the oxygen content index in high temperature environments, this measurement method is a supplement to the oxygen index test. high temperature oxygen index. It is based on the ordinary intelligent oxygen index and adds an electric heating device at the position of the combustion tube to preheat the mixed gas. Heating; and test the ignition point temperature of different materials under a certain oxygen concentration; used to determine the combustion performance of self-supporting vertical strips or plastic materials insheet form with a thickness of 10.5 mm under test conditions. It is also suitable for vertical supports.sheets often or Determination of combustion properties of thin film materials.

Meets standards:

ASTM D2863, BS ISO 4589-2, NES 714

Operation steps:

First: prepare the accessories and test samples;

Install the test samples on the fixture;

Use a long hook to place the clamp with the sample into the heat-resistant glass cylinder;

Turn on the switch of the instrument and enter the operation of the LCD screen. interface;

Purge oxygen and nitrogen respectively, 30 seconds each;

Set oxygen concentration parameters;

Set the heating temperature;

Heat the temperature insideeur of the test cylinder to a certain level, then stop;

Use a ignition gun to ignite the sample;

The stopwatch starts;

When the fire burns to a certain scale, the timer ends;

Stop ventilation and heating;

Saveand display data;

Remove the test sample and turn off the computer to complete the test;

Observe the combustion characteristics of the sample and continuously compare the burn time or burn duration of the sample to a given limit value. Through a series of tests under different oxygen concentrations, the lowest oxygen depth value expressed as an oxygen percentage when maintaining combustion is measured.

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