CN109406735A - A kind of Portable formaldehyde detection instrument and its application method that can be calibrated automatically - Google Patents
A kind of Portable formaldehyde detection instrument and its application method that can be calibrated automatically Download PDFInfo
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- CN109406735A CN109406735A CN201811531115.8A CN201811531115A CN109406735A CN 109406735 A CN109406735 A CN 109406735A CN 201811531115 A CN201811531115 A CN 201811531115A CN 109406735 A CN109406735 A CN 109406735A
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- detector
- work station
- gas
- formaldehyde
- outlet
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 259
- 238000001514 detection method Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 23
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003054 catalyst Substances 0.000 claims description 22
- 230000008676 import Effects 0.000 claims description 20
- 238000011084 recovery Methods 0.000 claims description 19
- 238000009834 vaporization Methods 0.000 claims description 16
- 230000008016 vaporization Effects 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims 1
- 235000019256 formaldehyde Nutrition 0.000 abstract description 66
- 229930040373 Paraformaldehyde Natural products 0.000 abstract description 2
- 229920002866 paraformaldehyde Polymers 0.000 abstract description 2
- 238000004164 analytical calibration Methods 0.000 abstract 1
- 239000002775 capsule Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- DSMZRNNAYQIMOM-UHFFFAOYSA-N iron molybdenum Chemical compound [Fe].[Fe].[Mo] DSMZRNNAYQIMOM-UHFFFAOYSA-N 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
Abstract
The invention discloses the Portable formaldehyde detection instruments that one kind can calibrate automatically, including work station and detector.Work station provides zero gas and multistage concentration standard gas for detector, calibrates to detector；Working at the same time station is that detector charges.In the case where detecting operating condition, detector is detached from work station, and detector works independently.The invention also discloses the application methods for the Portable formaldehyde detection instrument that one kind can calibrate automatically, including detection method and calibration method；Usually in inoperative, detector is connected with work station by fixed structure detector of the invention, and work station generating system can provide the methanol standard gas and zero gas of multistage certain concentration for detector, and detector can carry out the calibration of zero gas and standard gas calibration；Meanwhile work station internal electric source can PARA FORMALDEHYDE PRILLS(91,95) detector charge, and can control methylene oxide detecting instrument calibration.Under working condition, formaldehyde detector small volume be can be carried around, convenient convenience.
Description
Technical field
The present invention relates to Detection of Air Quality apparatus field, specifically a kind of Portable formaldehyde detection instrument that can be calibrated automatically
And its application method.
Background technique
Formaldehyde is that one kind is colourless, has the gas of intense irritation smell, seriously endangers human health, due to building now
With building and ornament materials containing formaldehyde are largely used in decoration industry so that formaldehyde become room air in major pollutants
One of, harm of the formaldehyde to practitioner and the pollution problem to ambient enviroment have attracted attention, therefore, right
The detection of formaldehyde has a very important significance.
Traditional Analysis Methods for Formaldehyde needs first to sample at the scene, then returns lab analysis；Analytical cycle is long, at high cost,
The demand of complex steps, the case where cannot reflecting indoor formaldehyde pollution in real time and high-volume sampling.Portable formaldehyde
Detector meets the above demand, and such detector is surveyed using sensor methods such as metal oxide sensor, electrochemical sensors
Determine concentration of formaldehyde, but sensor contacts the formaldehyde gas of high concentration for a long time, is easy to happen drift, influences the essence of detection data
True property, meanwhile, the standard of indoor formaldehyde concentration is 0.08mg/m3, far below the concentration of industrial circle formaldehyde, PARA FORMALDEHYDE PRILLS(91,95) detector
Accuracy more stringent requirements are proposed.
Summary of the invention
The purpose of the present invention is to provide Portable formaldehyde detection instruments and its application method that one kind can calibrate automatically, with solution
Certainly the problems mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme:
A kind of Portable formaldehyde detection instrument that can be calibrated automatically, including work station and detector, which is characterized in that work station
Standard gas and zero gas are provided for detector, realizes detector calibration function；Work station is that detector charges；When detection, detection
Device is detached from work station, is individually detected.
The work station, structure feature are, first work station air inlet, are offered in work station housing sidewall
One work station gas outlet, second work station gas outlet, second work station air inlet；Work station enclosure interior include: the first air pump,
First screen pipe, catalyst chamber, vaporization chamber, formaldehyde recovery tube, pedestal, syringe pump.Connection structure includes: first work station air inlet
Mouthful, it is connected by tracheae with the air inlet of the first air pump, is connected in the gas outlet of the first air pump with the entrance of the first screen pipe
Connect, the outlet of the first screen pipe is connected with an import of the first solenoid valve, the outlet of the first solenoid valve and vaporization chamber into
Mouthful be connected, another outlet of the first solenoid valve is connected with the import of second solenoid valve, another import of second solenoid valve with urge
Change room outlet to be connected, the outlet of second solenoid valve is connected with second work station gas outlet, and syringe pump is fixed by fixed frame
In on pedestal, the outlet of syringe pump is connected by capillary liquid pipe with the inlet of vaporization chamber, the outlet of vaporization chamber and catalyst chamber
Import is connected, and the outlet of formaldehyde recovery tube is connected by tracheae with first work station gas outlet, and the import of formaldehyde recovery tube is logical
Tracheae is crossed to be connected with second work station import.
The detector, structure feature are, detector air inlet and inspection are offered on the side wall of detector shell
Survey device gas outlet；Detector enclosure interior includes: detection gas chamber, formaldehyde sensor module, the second air pump.Connection structure includes:
Formaldehyde sensor module is fixed by bolts in detection gas chamber, and the air inlet for detecting gas chamber is connect with detector air inlet, detection
The gas outlet of gas chamber is connected with the air inlet of the second air pump, and the gas outlet of the second air pump is connected with detector gas outlet.
The Portable formaldehyde detection instrument that described one kind can calibrate automatically, which is characterized in that first screen pipe and institute
Stating formaldehyde recovery tube is the filter device equipped with filtration pack, wherein filtration pack be nanometer mine brilliant, modified resin or
The mixture of modified activated carbon, is also possible to combination.
The Portable formaldehyde detection instrument that described one kind can calibrate automatically, which is characterized in that iron molybdenum built in the catalyst chamber
Catalyst or silver catalyst.
The Portable formaldehyde detection instrument that described one kind can calibrate automatically, which is characterized in that the feed liquor mode of work station is
The concentration of methanol solution inside fixed syringe pump, generates the formaldehyde gas of various concentration by changing the flow velocity of syringe pump；?
Multiple syringe pumps can be used, each syringe pump takes different flow velocity and flow to achieve the effect that formaldehyde classification occurs.
The Portable formaldehyde detection instrument that described one kind can calibrate automatically, which is characterized in that can pass through in detection gas chamber
Add the VOC in PID or metal oxide sensor detection surrounding air.
A kind of application method for the Portable formaldehyde detection instrument that can be calibrated automatically, which is characterized in that including detection method and
Calibration method；
The detection method specifically: within the non-detection period, pass through fixation between work station shell and detector housing
Second work station gas outlet is connected by structure with detector air inlet, second work station air inlet with detector gas outlet；Inspection
It surveys in the period, detector is taken out from work station shell, detector is used alone, environment is detected.In the non-detection period,
Work station is detector charging by USB interface or charging holder interface, guarantees there are enough electricity when detector is used alone.
The standard gas calibration method specifically:
S101: work station is connect with detector, and work station can control calibration operation process by USB interface, can also be passed through
Other wireless mode control flows；
The calibration of S102: zero gas, opens air pump, switches the first solenoid valve and second solenoid valve.Make first work station air inlet
Mouth --- the first air pump --- screen pipe --- detection gas chamber --- the second air pump --- formaldehyde recovery capsule --- first work station
Gas outlet becomes connection gas circuit.Zero gas is generated in work station, zero gas is by entering inspection after work station gas outlet, detector air inlet
It surveys in gas chamber, carries out zero gas calibration.
S103: multistage standard gas concentration calibration, catalyst chamber and vaporization chamber are preheated to assigned temperature；Air pump and syringe pump are opened,
Methanol liquid is injected catalyst chamber by syringe pump；Switch the first solenoid valve and second solenoid valve, make first work station air inlet ---
--- screen pipe --- vaporization chamber --- catalyst chamber --- detection gas chamber --- the second air pump --- the formaldehyde recycling of first air pump
Pipe --- first work station gas outlet becomes connection gas circuit.
Work station generates formaldehyde, and formaldehyde gas is detected in gas chamber by entering after work station gas outlet, detector air inlet,
Standard gas calibration is carried out, exhaust gas enters formaldehyde recovery tube by detector gas outlet, second work station air inlet after calibration.
Work station can generate the formaldehyde gas of various concentration by changing the flow velocity of syringe pump；It can also use multiple
Syringe pump, each syringe pump take different flow velocity and flow to achieve the effect that formaldehyde classification occurs.
S104: detector recalculates concentration gradient model according to calibration result, completes calibration；
The cleaning of S105: zero gas, opens air pump, switches the first solenoid valve and second solenoid valve.Make first work station air inlet
Mouth --- the first air pump --- screen pipe --- detection gas chamber --- the second air pump --- formaldehyde recovery capsule --- first work station
Gas outlet becomes connection gas circuit.Zero gas is generated in work station, zero gas is by entering inspection after work station gas outlet, detector air inlet
It surveys in gas chamber, cleaning sensor.
Beneficial effects of the present invention:
1, detector is usually under non-detection status, and work station provides fixed structure with detector and is connected, work station energy
Standard gas and zero gas required for formaldehyde detector is calibrated enough are provided, ensure that the accuracy of methylene oxide detecting instrument.
2, under formaldehyde detector working condition, work station is dismantled with detector and is detected using detector, first
Aldehyde detector volume is smaller, can be carried around, convenient convenience.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of Portable formaldehyde detection instrument that can be calibrated automatically.
Fig. 2 is a kind of calibration flow chart of Portable formaldehyde detection instrument that can be calibrated automatically.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the examples below, implements below
Example for explaining only the invention, is not intended to limit the scope of the present invention..
The purpose of the present invention is to provide Portable formaldehyde detection instruments and its application method that one kind can calibrate automatically, with solution
Certainly the problems mentioned above in the background art.
Referring to FIG. 1-2, in the embodiment of the present invention, a kind of Portable formaldehyde detection instrument that can be calibrated automatically, including work
It stands and detector, which is characterized in that work station provides standard gas and zero gas for detector, realizes detector calibration function；Work station
It charges for detector；When detection, detector is detached from work station, is individually detected.
The work station, structure feature be, offered on 1 side wall of work station shell first work station air inlet 3,
First work station gas outlet 4, second work station gas outlet 5, second work station air inlet 7；It include: inside work station shell 1
One air pump 8, the first screen pipe 9, catalyst chamber 11, vaporization chamber 12, formaldehyde recovery tube 13, pedestal 14, syringe pump 15.Connection structure packet
Include: first work station air inlet 3 is connected by tracheae with the air inlet of the first air pump 8, the first air pump 8 gas outlet with
The entrance of first screen pipe 9 is connected, and the outlet of the first screen pipe 9 is connected with an import of the first solenoid valve 10, and first
The outlet of solenoid valve 10 is connected with the import of vaporization chamber 12, another outlet of the first solenoid valve 10 and the import of second solenoid valve 20
It is connected, another import of second solenoid valve 20 is connected with the outlet of catalyst chamber 11, the outlet of second solenoid valve 20 and the second work
Make station gas outlet 5 to be connected, syringe pump 15 is fixed on pedestal 14 by fixed frame, and the outlet of syringe pump 15 passes through capillary liquid pipe
It is connected with the inlet of vaporization chamber 12, the outlet of vaporization chamber 12 is connected with the import of catalyst chamber 11, the outlet of formaldehyde recovery tube 13
It is connected by tracheae with first work station gas outlet 4, the import of formaldehyde recovery tube 13 passes through tracheae and second work station import
It is connected.
The detector, structure feature are, 16 He of detector air inlet is offered on the side wall of detector shell 2
Detector gas outlet 6；It include: detection gas chamber 17, formaldehyde sensor module 18, the second air pump 19 inside detector shell 2.Connection
Structure includes: that formaldehyde sensor module 18 is fixed by bolts in detection gas chamber 17, detects the air inlet and detector of gas chamber 17
Air inlet 16 connects, and the gas outlet of detection gas chamber 17 is connected with the air inlet of the second air pump 19, the gas outlet of the second air pump 19
It is connected with detector gas outlet 6.
The Portable formaldehyde detection instrument that described one kind can calibrate automatically, which is characterized in that first screen pipe 9 and institute
Stating formaldehyde recovery tube 13 is the filter device equipped with filtration pack, and wherein filtration pack is nanometer mine crystalline substance, modified resin
Or the mixture of modified activated carbon, it is also possible to combination.
The Portable formaldehyde detection instrument that described one kind can calibrate automatically, which is characterized in that iron built in the catalyst chamber 11
Molybdenum catalyst or silver catalyst.
The Portable formaldehyde detection instrument that described one kind can calibrate automatically, which is characterized in that the feed liquor mode of work station is
The concentration of fixed 15 inside methanol solution of syringe pump generates the formaldehyde gas of various concentration by changing the flow velocity of syringe pump；
Multiple syringe pumps can also be used, each syringe pump takes different flow velocity and flow to achieve the effect that formaldehyde classification occurs.
The Portable formaldehyde detection instrument that described one kind can calibrate automatically, which is characterized in that can pass through in detection gas chamber
Add the VOC in PID or metal oxide sensor detection surrounding air.
A kind of application method for the Portable formaldehyde detection instrument that can be calibrated automatically, which is characterized in that including detection method and
Calibration method；
The detection method specifically: within the non-detection period, pass through fixation between work station shell and detector housing
Second work station gas outlet 5 is connected by structure with detector air inlet 16, second work station air inlet 7 with detector gas outlet 6
It connects；It detects in the period, detector is taken out from work station shell, detector is used alone, environment is detected.When non-detection
In section, work station is detector charging by USB interface or charging holder interface, guarantees to have when detector is used alone enough
Electricity.
Fig. 2 is a kind of calibration flow chart of Portable formaldehyde detection instrument that can be calibrated automatically, the standard gas calibration method tool
Body are as follows:
S101: work station is connect with detector, and work station can control calibration operation process by USB interface, can also be passed through
Other wireless mode control flows；
The calibration of S102: zero gas, opens air pump 8, switches the first solenoid valve 10 and second solenoid valve 20.Make first work station into
--- the first air pump 8 --- --- detection --- the second air pump 19 --- formaldehyde recovery capsule 13 --- of gas chamber 17 of screen pipe 9 of port 3
First work station gas outlet 4 becomes connection gas circuit.Generate zero gas in work station, zero gas by work station gas outlet 5, detector into
Enter in detection gas chamber 17 after port 16, carries out zero gas calibration.
S103: multistage standard gas concentration calibration, catalyst chamber 11 and vaporization chamber 12 are preheated to assigned temperature；Open air pump 8 and note
Pump 15 is penetrated, methanol liquid is injected catalyst chamber 11 by syringe pump 15；Switch the first solenoid valve 10 and second solenoid valve 20, makes the first work
Make station air inlet 3 --- the first air pump 8 --- --- --- catalyst chamber 11 --- detection gas chamber 17 --- of vaporization chamber 12 of screen pipe 9
Second air pump 19 --- formaldehyde recovery tube 13 --- first work station gas outlet 4 becomes connection gas circuit.
Work station generates formaldehyde, and formaldehyde gas is by entering detection gas chamber after work station gas outlet 5, detector air inlet 16
In 17, standard gas calibration is carried out, exhaust gas enters formaldehyde recovery tube by detector gas outlet 6, second work station air inlet 7 after calibration
13。
Work station can generate the formaldehyde gas of various concentration by changing the flow velocity of syringe pump 15；It can also use more
A syringe pump, each syringe pump take different flow velocity and flow to achieve the effect that formaldehyde classification occurs.
S104: detector recalculates concentration gradient model according to calibration result, completes calibration；
The cleaning of S105: zero gas, opens air pump 8, switches the first solenoid valve 10 and second solenoid valve 20.Make first work station into
--- the first air pump 8 --- --- detection --- the second air pump 19 --- formaldehyde recovery capsule 13 --- of gas chamber 17 of screen pipe 9 of port 3
First work station gas outlet 4 becomes connection gas circuit.Generate zero gas in work station, zero gas by work station gas outlet 5, detector into
Enter in detection gas chamber 17 after port 16, cleaning sensor.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection scope by appended claims and its
Equivalent defines.
Claims (9)
1. the Portable formaldehyde detection instrument that one kind can calibrate automatically, including work station and detector, which is characterized in that work station is
Detector provides standard gas and zero gas, realizes detector calibration function；Work station is that detector charges；When detection, detector
It is detached from work station, is individually detected.
The work station, structure feature be, offered on work station shell (1) side wall first work station air inlet (3),
First work station gas outlet (4), second work station gas outlet (5), second work station air inlet (7)；Work station shell (1) is internal
Include: the first air pump (8), the first screen pipe (9), catalyst chamber (11), vaporization chamber (12), formaldehyde recovery tube (13), pedestal (14),
Syringe pump (15；Connection structure includes: first work station air inlet (3), is connected by tracheae with the air inlet of the first air pump (8)
It connects, is connected in the gas outlet of the first air pump (8) with the entrance of the first screen pipe (9), the outlet and first of the first screen pipe (9)
One import of solenoid valve (10) is connected, and the outlet of the first solenoid valve (10) is connected with the import of vaporization chamber (12), the first electricity
Another outlet of magnet valve (10) is connected with the import of second solenoid valve (20), another import and catalysis of second solenoid valve (20)
Room (11) outlet is connected, and the outlet of second solenoid valve (20) is connected with second work station gas outlet (5), and syringe pump (15) is logical
It crosses fixed frame to be fixed on pedestal (14), the outlet of syringe pump (15) passes through the inlet phase of capillary liquid pipe and vaporization chamber (12)
Even, the outlet of vaporization chamber (12) is connected with the import of catalyst chamber (11), and the outlet of formaldehyde recovery tube (13) passes through tracheae and first
Work station gas outlet (4) is connected, and the import of formaldehyde recovery tube (13) is connected by tracheae with second work station import.
2. the Portable formaldehyde detection instrument that one kind according to claim 1 can calibrate automatically, which is characterized in that the detection
Device, structure feature are, detector air inlet (16) and detector gas outlet are offered on the side wall of detector shell (2)
(6)；It include: detection gas chamber (17), formaldehyde sensor module (18), the second air pump (19) inside detector shell (2)；Connection knot
Structure includes: that formaldehyde sensor module (18) is fixed by bolts in detection gas chamber (17), detects air inlet and the inspection of gas chamber (17)
Device air inlet (16) connection is surveyed, the gas outlet of detection gas chamber (17) is connected with the air inlet of the second air pump (19), the second air pump
(19) gas outlet is connected with detector gas outlet (6).
3. the Portable formaldehyde detection instrument that one kind according to claim 1 can calibrate automatically, described one kind can automatic school
Quasi- Portable formaldehyde detection instrument, which is characterized in that first screen pipe (9) and the formaldehyde recovery tube (13) are to be equipped with
The filter device of filtration pack, wherein filtration pack is the mixture of brilliant nanometer mine, modified resin or modified activated carbon,
It can be combination.
4. the Portable formaldehyde detection instrument that one kind according to claim 1 can calibrate automatically, described one kind can automatic school
Quasi- Portable formaldehyde detection instrument, which is characterized in that iron-molybdic catalyst or silver catalyst built in the catalyst chamber (11).
5. the Portable formaldehyde detection instrument that one kind according to claim 1 can calibrate automatically, which is characterized in that work station
Feed liquor mode is the concentration of fixed syringe pump (15) internal methanol solution, generates various concentration by changing the flow velocity of syringe pump
Formaldehyde gas；Multiple syringe pumps can also be used, each syringe pump takes different flow velocity and flow to reach formaldehyde classification
The effect of generation.
6. the Portable formaldehyde detection instrument that one kind according to claim 1 can calibrate automatically, which is characterized in that can detect
Pass through the VOC in addition PID or metal oxide sensor detection surrounding air in gas chamber.
7. the application method for the Portable formaldehyde detection instrument that one kind can calibrate automatically, which is characterized in that including detection method and school
Quasi- method.
8. the application method for the Portable formaldehyde detection instrument that one kind according to claim 7 can calibrate automatically, feature exist
In the detection method specifically: pass through air inlet within the non-detection period, between work station shell and detector housing, go out
Port connection；It detects in the period, detector is extracted from work station shell, detector is used alone, environment is detected；It is non-
It detects in the period, work station is detector charging by USB interface, guarantees there are enough electricity when detector is used alone, together
When work station can also by charging holder interface be detector charge.
9. the application method for the Portable formaldehyde detection instrument that one kind according to claim 7 can calibrate automatically, feature exist
In the standard gas calibration method specifically:
S101: work station is connect with detector, and work station can control calibration operation process by USB interface, can also be by other
Wireless mode control flow；
S102: zero gas is calibrated, and zero gas generating system in work station generates zero gas, and zero gas passes through work station gas outlet, detector
Enter in detection gas chamber after air inlet, carries out zero gas calibration；
S103: multistage standard gas concentration calibration, the formaldehyde generating system in work station generate formaldehyde, and formaldehyde gas is gone out by work station
Enter in detection gas chamber after port, detector air inlet, carries out standard gas calibration；
S104: detector recalculates concentration gradient model according to calibration result, completes calibration；
The cleaning of S105: zero gas, zero gas generating system generate zero gas, and zero gas is laggard by work station gas outlet, detector air inlet
Enter to detect in gas chamber, cleaning sensor.
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| CN201811531115.8A CN109406735A (en) | 2018-12-14 | 2018-12-14 | A kind of Portable formaldehyde detection instrument and its application method that can be calibrated automatically |
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| CN201811531115.8A CN109406735A (en) | 2018-12-14 | 2018-12-14 | A kind of Portable formaldehyde detection instrument and its application method that can be calibrated automatically |
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|---|---|---|---|---|
| CN109991370A (en) * | 2019-03-22 | 2019-07-09 | 上海市计量测试技术研究院 | A kind of calibrating installation and method for diffusion type methylene oxide detecting instrument |
| CN111398528A (en) * | 2020-04-01 | 2020-07-10 | 湖南鼎誉检验检测有限公司 | Portable air detection system for environmental improvement |
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