An oxygen sensor calibration method and online calibration device
A technology of oxygen sensor and calibration method, which is applied in the field of oxygen analysis, can solve problems such as time-consuming trouble, damage, and disassembly affecting the accuracy of the sensor, and achieve the effects of convenient implementation, reduced maintenance costs, and simplified conditions
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Embodiment 1
[0040] The following example illustrates an oxygen sensor calibration device when air is used as the calibration gas. The structural diagram of the oxygen sensor calibration device when it is closed is as follows: Figure 1a As shown, it includes a reference sample storage chamber 21 , a sample outlet 22 , a sample inlet 23 , a piston rod 51 , two piston discs 521 and 531 , sealing rings 522 and 532 on the two piston discs, and a cylinder 6 . Among them, a certain volume space is formed between the two piston disks 521, 531 and the reference sample storage chamber 21; the two piston disks are equipped with sealing rings 522 and 532, which play a sealing role and are used to seal a certain volume of gas; The cylinder 6 controls the movement of the piston rod 51 in the reference sample storage chamber 21 to realize opening and closing.
[0041] Install the oxygen sensor calibration device of Example 1 on the glove box, and then calibrate the oxygen sensor also installed on the g...
Embodiment 2
[0054] As another way of Embodiment 1, the reference sample storage chamber of the oxygen sensor calibration device is further connected with a reference sample inlet valve 71 and a reference sample outlet valve 72 .
[0055] When the oxygen sensor needs to be calibrated, the reference sample inlet valve 71 is opened, and the reference sample outlet valve 72 is closed, so that the reference sample is filled with the reference sample storage chamber; the piston rod 51 moves upward, and the reference sample is pushed into a closed space such as a glove Then the reference sample inlet valve is closed, and the reference sample outlet valve is opened to complete one sample injection; multiple sample injections can be performed.
Embodiment 3
[0057] An oxygen sensor online calibration device, including a reference sample storage chamber and a reference sample transfer device, the structure is as follows Figure 2a and Figure 2b shown. Figure 2a is the state when the device is turned off, Figure 2b is the state when the device is turned on.
[0058] The injector piston includes a piston rod 24 and a piston disc 21 arranged on the piston rod. The piston disc 21 is sealed and matched with the inner wall of the reference sample storage chamber 23, and the piston disc 21 and the inner wall of the reference sample storage chamber 23 form a quantitative reference sample. extraction and storage space;
[0059] The other end of the reference sample storage chamber 23 is connected with the sample outlet, and the sample inlet 25 and the sample outlet are all provided with a one-way valve. To the valve 26; when the piston disc 21 is located at the bottom of the reference sample storage chamber or moves from the sample o...
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