CN103616481A - Calibration method and device for dissolved oxygen sensor - Google Patents
Calibration method and device for dissolved oxygen sensor Download PDFInfo
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- CN103616481A CN103616481A CN201310637434.8A CN201310637434A CN103616481A CN 103616481 A CN103616481 A CN 103616481A CN 201310637434 A CN201310637434 A CN 201310637434A CN 103616481 A CN103616481 A CN 103616481A
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 239000001301 oxygen Substances 0.000 title claims abstract description 133
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 129
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims description 63
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 12
- 230000006378 damage Effects 0.000 abstract description 8
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 208000014674 injury Diseases 0.000 description 5
- 150000002926 oxygen Chemical class 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 239000012085 test solution Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002572 peristaltic effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a calibration method and a calibration device for a dissolved oxygen sensor, which are high in calibration precision, simple in structure and convenient to operate. Combined gas (N2 and O2 mixed gas) calibration replaces solution calibration, so that the influence of instability of the oxygen concentration in a solution on a measurement error is avoided; due to combined gas which is prepared according to a designed proportion, different oxygen concentrations with high precision can be obtained, so that the proportioning process of different oxygen concentrations in the solution is simplified, the precision of the oxygen concentration is improved, and the calibration time is shortened; the combined gas is a mixed gas of N2 and O2 and cannot pollute the atmosphere after being dispersed into air; meanwhile, no chemical reagent is needed in the calibration process, so that harm to a human body and secondary pollution to liquid to be detected are avoided; the whole dissolved oxygen sensor device only needs one closed container and several prepared mixed gases with different concentrations, so that a standard device is simple, is convenient to operate and has a good application prospect.
Description
Technical field
The present invention relates to field of measuring technique, be specifically related to a kind of scaling method and device of dissolved oxygen sensor.
Background technology
Traditional dissolved oxygen sensor, is generally used 2 demarcation, and Zero calibration and full scale are demarcated, and it demarcates liquid and scaling method is respectively: by excessive Na
2sO
3be dissolved in distilled water, through fully stirring, make Na
2sO
3oxygen in solution is absorbed totally, obtain oxygen-free water solution, the zero-error of determining instrument; When (25 ± 0.5) ℃, after air being passed into distilled water and dissolved oxygen concentration wherein being reached capacity, standing a period of time makes dissolved oxygen DO reach stable again, then the range error of determining instrument, need to ceaselessly stir solution during range measurement, prevents that the moment contacting with film is by the dissolved oxygen depletion in this position solution, affect measuring error, whole process probably needs 30 minutes, and the time is longer, and Zero calibration needs chemical reagent Na
2sO
3eyes, skin, mucous membrane are had to spread effect, and demarcate and produce waste liquid, should be to environment, full scale timing signal, in order to reach oxygen saturation and concentration stabilize, lead to enough long air and also need standing certain hour, therefore demarcate length consuming time, demarcation efficiency is low, the most important thing is that this scaling method cannot carry out precision test to other points within the scope of surveying instrument;
In addition, in some document, report another kind of test method, first formulated respectively saturated N
2solution and saturated O
2solution, by regulating the flow velocity of peristaltic pump, then mixes in different ratios, obtains the concentration of oxygen in different solutions, thereby reaches the object to dissolved oxygen sensor performance detecting, two kinds of saturated N
2solution and saturated O
2setup time of solution, long, poor stability, and was subject to the impact of peristaltic pump precision, and dissolved oxygen concentration is difficult to reach accuracy of instrument requirement.
And two kinds of above-mentioned scaling method knots are enough complicated, complex operation, in aqueous solution, oxygen concentration should not reach stable.
Summary of the invention
Technical matters solved by the invention is the scaling method that overcomes the dissolved oxygen sensor of prior art, and precision is low, and knot is enough complicated, complex operation, and in aqueous solution, oxygen concentration should not reach stable.The scaling method of dissolved oxygen sensor of the present invention and device, stated accuracy is high, simple in structure, easy to operate, and calibration process, without any need for chemical reagent, has been avoided the injury of human body and the secondary pollution to test solution.Package unit only needs a set of closed container, and the mixed gas of several variable concentrations that prepare, and makes standard set-up more succinct, more convenient operation.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A scaling method for dissolved oxygen sensor, is characterized in that: comprises the following steps,
Step (1), carries out gear division by the measurement range of dissolved oxygen sensor;
Step (2), the measurement range of the dissolved oxygen sensor after dividing according to gear, the mixed gas of proportioning corresponding concentration is divided in each composition gas bottle respectively, and described mixed gas is nitrogen, oxygen composition gas;
Step (3), integrated temperature sensor in dissolved oxygen sensor, measured value carries out temperature compensation;
Step (4), selects corresponding composition gas bottle, and the respective notch of dissolved oxygen sensor is demarcated;
Step (5), changes the composition gas bottle corresponding to mixed gas of different matched proportion densities, and the demarcation of repeating step (4), until all gears have all been demarcated in the measurement range of dissolved oxygen sensor.
The scaling method of aforesaid dissolved oxygen sensor, is characterized in that: step (1) dissolved oxygen sensor is divided 6 gears according to measurement range equal proportion.
The scaling method of aforesaid dissolved oxygen sensor, is characterized in that: step (4) is selected corresponding composition gas bottle, and the method that the respective notch of dissolved oxygen sensor is demarcated, comprises the following steps,
(1) open the reduction valve of composition gas bottle, by the gas inject sealable tank in composition gas bottle, and observe the tensimeter of combination gas bottle, make air pressure maintain 5 ~ 8 Mpa;
(2) dissolved oxygen sensor, standard thermometer are passed to host computer the measured data of sealable tank respectively, and host computer shows by software the data of accepting in real time, for operating personnel's observation, record;
(3) injecting gas, until the gas concentration in sealable tank is identical with gas concentration in composition gas bottle, and after stable, operating personnel record temperature value, the oxygen concentration value of dissolved oxygen sensor, the temperature value of record standard thermometer, record the oxygen density value of composition gas bottle, the form that the data typing of record is demarcated.
The device of the scaling method based on dissolved oxygen sensor, it is characterized in that: comprise many group composition gas bottles, nitrogen, the oxygen composition gas of different proportionings are housed in each composition gas bottle, on each composition gas bottle, rain glass and reduction valve are installed, one end of reduction valve is connected with sealable tank by gas piping, dissolved oxygen sensor and standard thermometer are installed in described sealable tank, and described dissolved oxygen sensor is connected with host computer by data line respectively with standard thermometer.
The caliberating device of aforesaid dissolved oxygen sensor, is characterized in that: the quantity of described composition gas bottle is consistent with the numbers of gear steps of dissolved oxygen sensor.
The caliberating device of aforesaid dissolved oxygen sensor, is characterized in that: described sealable tank is provided with two ball valves, and a ball valve is connected with reduction valve by gas piping, and another ball valve is used for discharging mixed gas.
The caliberating device of aforesaid dissolved oxygen sensor, is characterized in that: the junction of described sealable tank and data line adopts taper ring sealing.
The caliberating device of aforesaid dissolved oxygen sensor, is characterized in that: the junction of described dissolved oxygen sensor and standard thermometer and sealable tank adopts rubber seal.
The invention has the beneficial effects as follows: the scaling method of dissolved oxygen sensor of the present invention and device, stated accuracy is high, simple in structure, easy to operate, adopts composition gas (N
2and O
2mixed gas) demarcate to replace standardization of solution, solve the unstable impact on measuring error of oxygen concentration in solution, by the composition gas of preparing by design proportioning, obtain the higher different oxygen concentrations of precision, simplified the proportioning process of different oxygen concentrations in solution, improved the precision of oxygen concentration, saved the nominal time, the composition gas of employing is N
2and O
2combination gas, be diffused into the pollution that can not cause atmosphere in air, simultaneously, calibration process, without any need for chemical reagent, has been avoided the injury of human body and the secondary pollution to test solution, and a whole set of dissolved oxygen sensor device only needs a set of closed container, mixed gas with several variable concentrations that prepare, make standard set-up more succinct, more convenient operation, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the caliberating device of dissolved oxygen sensor of the present invention.
Mark in accompanying drawing is as follows:
1: composition gas bottle; 2: rain glass; 3: reduction valve; 4: data line; 5: host computer; 6: gas piping; 7: sealable tank; 8: ball valve.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
The scaling method of dissolved oxygen sensor of the present invention, stated accuracy is high, simple in structure, easy to operate, adopts composition gas (N
2and O
2mixed gas) demarcate to replace standardization of solution, can solve the unstable impact on measuring error of oxygen concentration in solution.The composition gas of pressing the preparation of design proportioning by buying, can obtain the different oxygen concentrations that precision is higher, has simplified the proportioning process of different oxygen concentrations in solution, has improved the precision of oxygen concentration, has saved the nominal time, and the composition gas of employing is N
2and O
2mixed gas, be diffused into the pollution that can not cause atmosphere in air, meanwhile, calibration process, without any need for chemical reagent, has been avoided, to the injury of human body and the secondary pollution to test solution, specifically comprising the following steps,
Step (1), carries out gear division by the measurement range of dissolved oxygen sensor, according to measurement range equal proportion, divides 6 gears;
Step (2), the measurement range of the dissolved oxygen sensor after dividing according to gear, the mixed gas of proportioning corresponding concentration is divided in each composition gas bottle respectively, and described mixed gas is nitrogen, oxygen composition gas;
Step (3), integrated temperature sensor in dissolved oxygen sensor, measured value carries out temperature compensation, and temperature compensation principle illustrates,
According to oxygen concentration in air, be 20.9%, and under different temperatures in water saturated oxygen concentration with reference to JJG291-2008 appendix C, the oxygen concentration of configuration composition gas can be converted into water oxygen concentration, method is,
First, suppose configuration composition gas concentration be 10%;
At 25 ℃, looking into saturated oxygen concentration in the known water of JJG291-2008 appendix C is 8.25mg/L,
Oxygen content is the oxygen concentration of 10% composition gas, and while being equivalent to 25 ℃, the oxygen concentration in water is, 10%*8.25/20.9%=3.95mg/L; When temperature is different, look into JJG291-2008 appendix C known, in water, saturated oxygen concentration is just different, is similarly the oxygen concentration of 10% composition gas, is converted into water oxygen concentration just different; While supposing 20 ℃, looking into saturated oxygen concentration in the known water of JJG291-2008 appendix C is 9.08mg/L, and the oxygen concentration of the composition gas that oxygen content is now 10%, while being equivalent to 20 ℃, the oxygen concentration in water is: 10%*9.08/20.9%=4.34mg/L;
Can set up the relation between oxygen concentration and water oxygen concentration in composition gas, improve stated accuracy high;
Step (4), selects corresponding composition gas bottle, and the respective notch of dissolved oxygen sensor is demarcated, when temperature compensation, comprise the following steps,
(1) open the reduction valve of composition gas bottle, by the gas inject sealable tank in composition gas bottle, and the tensimeter of observation combination gas bottle, make air pressure maintain 5 ~ 8 Mpa, air pressure is unsuitable excessive or too small, excessive high pressure gas is known from experience makes dissolved oxygen sensor and sealable tank produce collision, easily causes sensor damage, and gases at high pressure and the fricative noise of reduction valve also have certain injury to operating personnel; Too small air pressure cannot thoroughly be discharged residual gas in sealable tank, and easily causes atmosphere to be back in sealable tank, affects stated accuracy;
(2) dissolved oxygen sensor, standard thermometer are passed to host computer the measured data of sealable tank respectively, and host computer shows by software the data of accepting in real time, for operating personnel's observation, record;
(3) injecting gas, until the gas concentration in sealable tank is identical with gas concentration in composition gas bottle, and after stable, this process is probably for sealable tank injected mixed gas after 30 seconds, in gas concentration in sealable tank and composition gas bottle, gas concentration is basic identical, after 60 seconds, the measured value of dissolved oxygen sensor is stable, after value stabilization to be measured, operating personnel record temperature value, the oxygen concentration value of dissolved oxygen sensor, the temperature value of record standard thermometer, record the oxygen density value of oxygen, nitrogen composition gas bottle 1, the data typing of record is demarcated to form;
Step (5), changes the composition gas bottle corresponding to mixed gas of different matched proportion densities, and the demarcation of repeating step (4), until all gears have all been demarcated in the measurement range of dissolved oxygen sensor.
As shown in Figure 1, the device of the scaling method based on dissolved oxygen sensor, comprise many group composition gas bottles 1, nitrogen, the oxygen composition gas of different proportionings are housed in each composition gas bottle 1, rain glass 2 and reduction valve 3 are installed on each composition gas bottle 1, one end of reduction valve 3 is connected with sealable tank 7 by gas piping 6, and dissolved oxygen sensor and standard thermometer are installed in sealable tank 7, and dissolved oxygen sensor is connected with host computer by data line 4 respectively with standard thermometer.
The quantity of described composition gas bottle 1 is consistent with the numbers of gear steps of dissolved oxygen sensor, is 6.
On described sealable tank, 1 is provided with 8, one ball valves 8 of two ball valves and is connected with reduction valve 3 by gas piping 6, and another ball valve 8 is for discharging mixed gas, and ball valve 8 facilitates discharge and the sealing of mixed gas;
Described sealable tank 7 adopts taper ring sealing with the junction of data line 4; The junction of described dissolved oxygen sensor and standard thermometer and sealable tank 7 adopts rubber seal, improves sealing, increases the accuracy of demarcating.
The calibration process of the caliberating device of dissolved oxygen sensor of the present invention is as follows:
The measurement range of dissolved oxygen sensor is divided into 6 grades (can require to carry out gear division according to difference), the mixed gas of different matched proportion densities is divided in various combination gas bottle 1, according to the different composition gas bottles 1 of changing variable concentrations of the measured value of demarcating, because dissolved oxygen DO is subject to the impact of temperature larger, measured value need carry out temperature compensation, therefore dissolved oxygen sensor is inner integrated temperature sensor, so need standard thermometer to carry out than survey at timing signal, for improving stated accuracy, dissolved oxygen sensor and standard thermometer pack in sealable tank 7 jointly, for guaranteeing impermeability, each junction of sealable tank all adopts rubber seal, dissolved oxygen sensor is connected with host computer 5 by data line 4 respectively with standard thermometer, data line and sealable tank junction adopt taper ring sealing, rain glass 2 and reduction valve 3 are housed on composition gas bottle 1, composition gas enters sealable tank 7 by gas pipe line 9, two ball valves 8 are housed on sealable tank 7 housings, to realize sealable tank 7, exchange with extraneous gas,
Timing signal, according to the selected different composition gas bottle 1 of different oxygen concentrations, open reduction valve 3, gas in composition gas bottle 1 just injects sealable tank 7 by gas piping 6 and (notes: the process at injecting gas will guarantee the upper of sealable tank 7, lower two ball valves are opened simultaneously), in injection process, observe rain glass 2, make air pressure maintain 5 ~ 8 Mpa, the air pressure is here unsuitable excessive or too small, excessive high pressure gas is known from experience makes dissolved oxygen sensor and sealable tank 7 produce collision, easily cause sensor to damage, and gases at high pressure and the fricative noise of reduction valve 3 also have certain injury to operating personnel, too small air pressure cannot thoroughly be discharged residual gas in sealable tank, and easily causes atmosphere to be back in sealable tank 7, affects stated accuracy.Dissolved oxygen sensor, standard thermometer are passed to host computer 5 by data line 4 measured data respectively, and host computer 5 shows passed data in real time by software, for operating personnel's observation, record; After injecting gas 30 seconds, in the gas concentration in sealable tank 7 and oxygen, nitrogen composition gas bottle 1, gas concentration is basic identical; After 60 seconds, the measured value of dissolved oxygen sensor is stable.After value stabilization to be measured, operating personnel record temperature value, the oxygen concentration value of dissolved oxygen sensor, and the temperature value of record standard thermometer records the oxygen density value of oxygen, nitrogen composition gas bottle 1.The data typing of record is demarcated to form, close reduction valve 3, change oxygen, the nitrogen composition gas bottle 1 of different matched proportion densities, repeat above-mentioned proving operation, until all gears of dissolved oxygen sensor have all been demarcated.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1. the scaling method of dissolved oxygen sensor, is characterized in that: comprises the following steps,
Step (1), carries out gear division by the measurement range of dissolved oxygen sensor;
Step (2), the measurement range of the dissolved oxygen sensor after dividing according to gear, the mixed gas of proportioning corresponding concentration is divided in each composition gas bottle respectively, and described mixed gas is nitrogen, oxygen composition gas;
Step (3), integrated temperature sensor in dissolved oxygen sensor, measured value carries out temperature compensation;
Step (4), selects corresponding composition gas bottle, and the respective notch of dissolved oxygen sensor is demarcated;
Step (5), changes the composition gas bottle corresponding to mixed gas of different matched proportion densities, and the demarcation of repeating step (4), until all gears have all been demarcated in the measurement range of dissolved oxygen sensor.
2. the scaling method of dissolved oxygen sensor according to claim 1, is characterized in that: step (1) dissolved oxygen sensor is divided 6 gears according to measurement range equal proportion.
3. the scaling method of dissolved oxygen sensor according to claim 1, is characterized in that: step (4) is selected corresponding composition gas bottle, and the method that the respective notch of dissolved oxygen sensor is demarcated, comprises the following steps,
(1) open the reduction valve of composition gas bottle, by the gas inject sealable tank in composition gas bottle, and observe the tensimeter of combination gas bottle, make air pressure maintain 5 ~ 8 Mpa;
(2) dissolved oxygen sensor, standard thermometer are passed to host computer the measured data of sealable tank respectively, and host computer shows by software the data of accepting in real time, for operating personnel's observation, record;
(3) injecting gas, until the gas concentration in sealable tank is identical with gas concentration in composition gas bottle, and after stable, operating personnel record temperature value, the oxygen concentration value of dissolved oxygen sensor, the temperature value of record standard thermometer, record the oxygen density value of composition gas bottle, the form that the data typing of record is demarcated.
4. the device of the scaling method based on dissolved oxygen sensor, it is characterized in that: comprise many group composition gas bottles, nitrogen, the oxygen composition gas of different proportionings are housed in each composition gas bottle, on each composition gas bottle, rain glass and reduction valve are installed, one end of reduction valve is connected with sealable tank by gas piping, dissolved oxygen sensor and standard thermometer are installed in described sealable tank, and described dissolved oxygen sensor is connected with host computer by data line respectively with standard thermometer.
5. the caliberating device of dissolved oxygen sensor according to claim 4, is characterized in that: the quantity of described composition gas bottle is consistent with the numbers of gear steps of dissolved oxygen sensor.
6. the caliberating device of dissolved oxygen sensor according to claim 4, is characterized in that: described sealable tank is provided with two ball valves, and a ball valve is connected with reduction valve by gas piping, and another ball valve is used for discharging mixed gas.
7. the caliberating device of dissolved oxygen sensor according to claim 4, is characterized in that: the junction of described sealable tank and data line adopts taper ring sealing.
8. the caliberating device of dissolved oxygen sensor according to claim 4, is characterized in that: the junction of described dissolved oxygen sensor and standard thermometer and sealable tank adopts rubber seal.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515761A (en) * | 2014-12-20 | 2015-04-15 | 国家海洋局第二海洋研究所 | High-precision optical dissolved oxygen sensor calibration method and device |
| CN105675803A (en) * | 2014-11-19 | 2016-06-15 | 中国石油天然气股份有限公司 | Gas calibration device and method used for unbalanced drilling (UBD) |
| CN107607672A (en) * | 2017-08-29 | 2018-01-19 | 广州海洋地质调查局 | A kind of underwater gas sensor calibrator (-ter) unit and calibration method |
| CN108169147A (en) * | 2016-12-06 | 2018-06-15 | 恩德莱斯和豪瑟尔分析仪表两合公司 | For adjusting the method for measuring apparatus |
| CN109884263A (en) * | 2019-03-28 | 2019-06-14 | 江苏核电有限公司 | A kind of dissolved oxygen sensor experimental rig and its test method |
| CN111044589A (en) * | 2019-12-02 | 2020-04-21 | 河北冀研能源科学技术研究院有限公司 | Preparation method of zero-point correction oxygen-free water for electrodes of online dissolved oxygen meter in thermal power plant |
| CN111239091A (en) * | 2020-02-23 | 2020-06-05 | 江苏省农业科学院 | Dissolved oxygen sensor calibration device and calibration method based on fluorescence quenching principle |
| CN113866362A (en) * | 2021-09-28 | 2021-12-31 | 明石创新(烟台)微纳传感技术研究院有限公司 | Intelligent efficient accurate oxygen measuring instrument calibration and compensation method |
| CN113916849A (en) * | 2021-09-10 | 2022-01-11 | 山东省科学院海洋仪器仪表研究所 | Calibration method and calibration device for optical dissolved oxygen sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105675803A (en) * | 2014-11-19 | 2016-06-15 | 中国石油天然气股份有限公司 | Gas calibration device and method used for unbalanced drilling (UBD) |
| CN104515761A (en) * | 2014-12-20 | 2015-04-15 | 国家海洋局第二海洋研究所 | High-precision optical dissolved oxygen sensor calibration method and device |
| CN104515761B (en) * | 2014-12-20 | 2017-05-17 | 国家海洋局第二海洋研究所 | High-precision optical dissolved oxygen sensor calibration method and device |
| CN108169147A (en) * | 2016-12-06 | 2018-06-15 | 恩德莱斯和豪瑟尔分析仪表两合公司 | For adjusting the method for measuring apparatus |
| CN108169147B (en) * | 2016-12-06 | 2020-12-11 | 恩德莱斯和豪瑟尔分析仪表两合公司 | Method for adjusting a measuring device |
| CN107607672A (en) * | 2017-08-29 | 2018-01-19 | 广州海洋地质调查局 | A kind of underwater gas sensor calibrator (-ter) unit and calibration method |
| CN109884263A (en) * | 2019-03-28 | 2019-06-14 | 江苏核电有限公司 | A kind of dissolved oxygen sensor experimental rig and its test method |
| CN109884263B (en) * | 2019-03-28 | 2023-12-15 | 江苏核电有限公司 | Dissolved oxygen sensor test device and test method thereof |
| CN111044589A (en) * | 2019-12-02 | 2020-04-21 | 河北冀研能源科学技术研究院有限公司 | Preparation method of zero-point correction oxygen-free water for electrodes of online dissolved oxygen meter in thermal power plant |
| CN111239091A (en) * | 2020-02-23 | 2020-06-05 | 江苏省农业科学院 | Dissolved oxygen sensor calibration device and calibration method based on fluorescence quenching principle |
| CN113916849A (en) * | 2021-09-10 | 2022-01-11 | 山东省科学院海洋仪器仪表研究所 | Calibration method and calibration device for optical dissolved oxygen sensor |
| CN113866362A (en) * | 2021-09-28 | 2021-12-31 | 明石创新(烟台)微纳传感技术研究院有限公司 | Intelligent efficient accurate oxygen measuring instrument calibration and compensation method |
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| CN103616481B (en) | 2015-10-07 |
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