Digital oxygen index tester -An instrument used to measure the oxygen concentration (volume percent) of a polymer and other products during combustion. The oxygen index is the percentage of the lowest oxygen in the mixture of oxygen and nitrogen gas that the substance can burn for up to 50 mm or 3 minutes after it is ignited. The equipment has simple structure, convenient operation, can be used as a means of identification of polymer combustion performance, also can be used as a kind of relevant research and analysis instruments, the combustion process of polymer for better understanding.
Installation method :
1. Place the instrument on the workbench after unpacking.
2. Use the plastic reinforcement tube to connect the oxygen and nitrogen gas output end of the control box to the pipe connection head on the bottom end of the main engine and tighten it with the pipe. Note: nitrogen and oxygen in the back of the control box correspond to the nitrogen and oxygen in the front, and the output of the mixture is in the middle.
3. Install the oxygen and nitrogen cylinder, and install the pressure reducing valve on the cylinder. Using the plastic reinforcement tube, the nitrogen and oxygen joints on the rear panel of the control box are respectively connected with the oxygen and the output end of the nitrogen cylinder reducing valve. The cylinder and the reducing valve are supplied by the user.
4. First place the large hole diffuser ring column facing up, and the small hole diffuser ring column faces down, and then the barrel is installed on the base.
5. Fill glass bead and install fixture.
Maintenance:
In oxygen index tests, oxygen sensors are used to convert combustion of chemical signals into electrical signals in front of the operator. The sensor is equivalent to a battery, which is used once per test. The user has high frequency of use or high oxygen index of the test material, and the oxygen sensor will have high consumption.
In terms of maintenance and maintenance, the following two factors can help to prolong the service life of oxygen sensor.
1. If the equipment does not need to be tested for a long time, the oxygen sensor can be removed by the operation instruction of the eighth item, which can be sealed at a lower temperature to preserve the oxygen preservation. Simple operation method can be protected by plastic wrap and placed in refrigerator freezer.
2. Such as equipment use frequency is relatively high (such as the use of the interval of three or four days period), at the end of the test on the same day, you can first close oxygen bottles every one to two minutes and then shut the nitrogen bottle, fill nitrogen in other mixing device with reducing oxygen sensors and oxygen exposure of invalid response.
The automatic oxygen index meter is suitable for the determination of the minimum oxygen concentration required for the combustion of the sample in the mixture of oxygen and nitrogen under the specified test conditions. It is used to evaluate the combustion performance of homogeneous solid material, laminated material, foam material, film and film, etc.
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