CN106290928B - A kind of calibration method of expiration alcohol tester - Google Patents
A kind of calibration method of expiration alcohol tester Download PDFInfo
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- CN106290928B CN106290928B CN201610685265.9A CN201610685265A CN106290928B CN 106290928 B CN106290928 B CN 106290928B CN 201610685265 A CN201610685265 A CN 201610685265A CN 106290928 B CN106290928 B CN 106290928B
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- 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
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/98—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving alcohol, e.g. ethanol in breath
Abstract
The invention discloses a kind of calibration method of expiration alcohol tester, comprise the following steps：(a) test environment is controlled；(b) reference solution is prepared；(c) port grinding bottle is put into constant water bath box；(d) reference solution graded alcohols concentration is obtained；(e) unified calibration expiration alcohol tester；(f) tester is arranged.The present invention changes the horizontal and vertical position that port grinding bottle is in constant water bath box, graded alcohols concentration using the average value of acquirement as reference solution, exclude the interference that diverse location bath temperature has differences in constant water bath box, the graded alcohols concentration of acquired reference solution has high reference value, then batch carries out uniformity test to expiration alcohol tester, test repeatability is good, by the test concentration of alcohol of expiration alcohol tester compared with the graded alcohols concentration of reference solution, determine error, unified calibration is carried out to expiration alcohol tester according to error, improve calibration accuracy, calibration result is accurately and reliably.
Description
Technical field
The present invention relates to expiration alcohol tester technical field, more particularly to a kind of calibration side of expiration alcohol tester
Method.
Background technology
In recent years, with China's rapid development of economy, the rapid raising of living standards of the people, the vehicle travelled on highway
Substantial increase, traffic accident caused by driving when intoxicated occur again and again.According to relevant statistics, the whole world is died because of traffic accident every year
Number just more than 600,000 people, leaves permanent residual the wounded more than 4,000,000, the general the wounded is then countless.In many countries,
Traffic accident has turned into first unexpected death reason.
In theory, to judge whether it is to drive when intoxicated, most accurate method should be checked in human pilot blood
Alcohol content, alcohol content in blood can be by checking that blood, expiration, saliva and urine obtain, at present using exhaling
Alcohol tester is used for the instrument for measuring alcohol content in characteristics of contaminated respiratory droplets gas.Expiration formula alcohol tester is to develop the nineties
A kind of new detection technique come, sensor technology, electronic technology, signal transacting and computer technology are merged by it,
Overcome traditional pure gas sensor in the detection existing cross sensitivity the shortcomings of, can be mixed from exhaling by alcohol gas
Close and separated in gas, and qualitative or quantitative analysis is carried out to it, it is related to material, precision manufactureing, Multi-sensor Fusion, meter
The multi-field science and technology such as calculation machine, embedded system, applied mathematics, gathers around and has broad application prospects.
With increasing, traffic administration legalization, the severization increasingly so that expiration alcohol is tested of China's motor vehicles
Instrument turns into the common equipment of public security traffic department law enforcement, this calibration also to expiration alcohol tester propose it is higher will
Ask, the calibration method of expiration alcohol tester, which is required to use, at present matches somebody with somebody gas cylinder, but not only configures trouble with gas cylinder method, requires
Speciality equipment, and measurement reproducibility is very poor, can not ensure calibrating quality.
The content of the invention
Present invention aims at solve above-mentioned technical problem present in prior art, there is provided a kind of expiration alcohol tester
Calibration method, change port grinding bottle and be in the horizontal and vertical position of constant water bath box, the average value of acquirement is molten as referring to
The graded alcohols concentration of liquid, exclude the interference that diverse location bath temperature has differences in constant water bath box, acquired reference
The graded alcohols concentration of solution has high reference value, and then batch carries out uniformity test to expiration alcohol tester,
Test repeatability is good, by the test concentration of alcohol of expiration alcohol tester compared with the graded alcohols concentration of reference solution,
Error is determined, carries out unified calibration to expiration alcohol tester according to error, improves calibration accuracy, calibration result accurately may be used
Lean on, improve the measurement accuracy of expiration alcohol tester.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：
A kind of calibration method of expiration alcohol tester, it is characterised in that comprise the following steps：
(a) test environment is controlled；
(b) reference solution is prepared：Absolute alcohol is put into mixing chamber, and adds distilled water mixing, is mixed into mixing chamber
Liquid design height, then control operation panel are closed, turn on agitator, mixed solution is mixed, obtains alcohol water blend, then will be mixed
The injection head closed on room is stretched into port grinding bottle, and alcohol water blend is injected into port grinding bottle, after injection terminates, stoppers rubber
Plug, as reference solution；
(c) port grinding bottle is put into constant water bath box：Port grinding bottle is placed on position regulator, with support meanss
Backplanes support port grinding bottle, then control push rod to move down clamping device, the clamping ring at clamping device clasps the neck of port grinding bottle, then will
Clamping device is locked, and port grinding bottle is locked in position regulator, is then put into position regulator by control-rod
In constant water bath box, 34 DEG C of setting water bath with thermostatic control temperature, port grinding bottle is placed into 20min and carries out equalized temperature；
(d) reference solution graded alcohols concentration is obtained：Mobile control-rod, port grinding bottle control is set into position in constant water bath box
Put, and rule at control-rod, be recorded as first position, then air pump set in advance is accessed at air inlet pipe, then to mill
Mouth bottle carries out 10s and washed away, and accesses gas chromatograph after washing away at escape pipe, heats air inlet pipe and escape pipe, obtain first
Five parts of ethanol chromatograms of reference solution at A are put, then set control-rod onto horizon bar, keep control-rod level height not
Become, then move horizontally control-rod, change the horizontal level of port grinding bottle, open air pump, obtain reference solution at the B of first position
Five parts of ethanol chromatograms, continue to move horizontally control-rod, obtain at the C of first position and D at reference solution each five parts of ethanol
Chromatogram, one is obtained 20 parts of related ethanol chromatograms of first position, is then asked by 20 parts of related ethanol chromatograms
Go out the ethanol mean concentration of reference solution at first position, recorded, then remove horizon bar, and control-rod is set to perpendicular
On straight-bar, control-rod is vertically moved, changes position of the port grinding bottle in constant water bath box, then is rule at control-rod, is recorded as
The second place, then follow first position same procedure and 20 parts of related ethanol chromatograms, Ran Houtong are obtained in the second place
The ethanol mean concentration that 20 parts of related ethanol chromatograms obtain second place reference solution is crossed, is recorded, recorded altogether
The ethanol mean concentration of the reference solution of different longitudinal position at ten in constant water bath box, it then will obtain ethanol mean concentration and paint
Statistical chart processed, then by carrying out calculating average value, obtain the graded alcohols concentration of reference solution；
(e) unified calibration expiration alcohol tester：Mobile control-rod, interposition at constant water bath box is adjusted to by port grinding bottle
Put, then fixed control-rod, then expiration alcohol tester is linked at escape pipe, visually observes thermometer in constant water bath box
Reading, it is 34 DEG C to control water bath with thermostatic control temperature, heats air inlet pipe and escape pipe, opens air pump, and the gas in port grinding bottle enters
Enter into tested expiration alcohol tester, operating personnel keep expiration alcohol tester horizontal stable, and read expiration alcohol
The reading of tester, then evacuation of air, carries out retest to same expiration alcohol tester, reads five readings, take
The average value of reading, as the test concentration of alcohol of the expiration alcohol tester, then by the test of the expiration alcohol tester
Concentration of alcohol determines error compared with the graded alcohols concentration of reference solution, and expiration alcohol tester is entered according to error
Row calibration, port grinding bottle is maintained at by same position in constant water bath box using position regulator, it is unified that expiration alcohol is tested
Instrument is calibrated；
(f) tester is arranged.
Further, in step (a), control test environment is made as normal temperature including test cabinet temperature control, and controls indoor temperature ± 2
DEG C, test pressure is standard atmospheric pressure, and testing humidity is controlled in 20%-80%.
Further, in step (c), constant water bath box under specified input voltage before use, run 1 and a half hours, so
Test voltage afterwards, input power is monitored using voltmeter, makes the degree of accuracy of voltage in the range of ± 2%.
Further, in step (c), constant water bath box to constant water bath box before use, carry out electrical safety detection.
Further, the tail end of air inlet pipe is shut with pipe sleeve, then opens up 20-30 aperture in the side of air inlet pipe, will be blown into
Gas in port grinding bottle is sufficiently mixed with alcohol water blend.
Further, in step (e), control air pump is pumped into the speed of gas, the gas in port grinding bottle is entered tested
Expiration alcohol tester time control in 10-15s.
The present invention is by adopting the above-described technical solution, have the advantages that：
The present invention is cooperated using clamping device and support meanss, and port grinding bottle is spacing on position regulator, is led to
Cross control-rod to move on horizon bar so that port grinding bottle is constant in the lengthwise position of constant water bath box, changes port grinding bottle and is in perseverance
The lateral attitude of warm water bath cabinet, five parts of ethanol chromatograms of the reference solution in constant water bath box somewhere are obtained by gas chromatograph
Figure, obtains the ethanol mean concentration of the reference solution of the position；Control-rod is set onto vertical bar, is vertically moved control-rod, is changed
Become lengthwise position of the port grinding bottle in constant water bath box, the lengthwise position after change uses same transverse shifting method, obtained
The ethanol mean concentration of the reference solution of the position, the differentiation of lengthwise position are mainly entered by the line of diverse location at control-rod
Row is distinguished；The ethanol mean concentration that lengthwise position is obtained draws statistical chart, then calculates the flat of lengthwise position ethanol mean concentration
Average, the graded alcohols concentration using the average value of acquirement as reference solution, can exclude diverse location water-bath in constant water bath box
The interference that temperature has differences, the graded alcohols concentration of acquired reference solution have high reference value.
Port grinding bottle is adjusted to centre position at constant water bath box by the present invention, in batches to expiration alcohol tester to be calibrated
Uniformity test is carried out, test repeatability is good, by the test concentration of alcohol of expiration alcohol tester and the standard second of reference solution
Determining alcohol is compared, and determines error, carries out unified calibration to expiration alcohol tester according to error, improves calibration accuracy,
Calibration result accurately and reliably, improves the measurement accuracy of expiration alcohol tester.
The degree of accuracy of the present invention is high, reliable and stable, simple to operate, practical, and alcohol water blend prepares simple, preservation
It is of long duration.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Structural representation when Fig. 1 is present invention calibration；
Fig. 2 is the structural representation of position regulator in the present invention；
Fig. 3 is the structural representation of clamping device in the present invention；
Fig. 4 is the structural representation of support meanss in the present invention.
Embodiment
As shown in Figures 1 to 4, a kind of calibration method of expiration alcohol tester of the present invention, comprises the following steps：
(a) test environment is controlled：Control test environment is made as normal temperature including test cabinet temperature control, and controls indoor temperature ± 2
DEG C, test pressure is standard atmospheric pressure, and testing humidity is controlled in 20%-80%, and test process needs to keep same surrounding environment.
(b) reference solution is prepared：By 77ml absolute alcohols (relative density 0.79), the mixing chamber with injection head is put into
In, and add distilled water mixing, the mixed liquor design height into mixing chamber.
Control operation panel again, turn on agitator, mixed solution is mixed, obtain alcohol water blend, then by mixing chamber
On injection head stretch into port grinding bottle 1, and alcohol water blend is injected into port grinding bottle 1, after injection terminates, stoppers rubber stopper 2,
As reference solution.The residual alcohol aqueous solution is stored in air-tight bottle, when under 4 DEG C or room ambient conditions, is not had by 1 year
It is significant to change.
(c) port grinding bottle 1 is put into constant water bath box 5：Port grinding bottle 1 is placed on position regulator 6, uses support meanss
Bottom plate 8 on 7 supports port grinding bottle 1.Push rod 11 is controlled to move down clamping device 9 again, the clamping ring 10 at clamping device 9 clasps ground
The neck of bottle 1, then clamping device 9 is locked, port grinding bottle 1 is locked in position regulator 6.
Position regulator 6 is put into constant water bath box 5 by control-rod 12,34 DEG C of setting water bath with thermostatic control temperature,
Water bath with thermostatic control temperature control ± 0.1 DEG C.Port grinding bottle 1 is placed into 20min and carries out equalized temperature.Constant water bath box 5 is before use, referring to
Run under fixed input voltage 1 and a half hours, then test voltage, monitors input power using voltmeter, make the accurate of voltage
Degree is in the range of ± 2%.
Constant water bath box 5 before use, carrying out electrical safety detection to constant water bath box 5, with protecting grasped by electrical safety detection
Author will not get an electric shock.Proper use of input power fuse simultaneously ensures the joint with high risk not being exposed；Sentence
Whether power-off line should overuse and overheat, and ensure to be not in inappropriate running and fire hazards.
(d) reference solution graded alcohols concentration is obtained：Mobile control-rod 12, port grinding bottle 1 is controlled and set in constant water bath box 5
Positioning is put, and is rule at control-rod 12, is recorded as first position.Air pump set in advance is accessed at air inlet pipe 3 again, is entered
The tail end of tracheae 3 is shut with pipe sleeve, then 20-30 aperture is opened up in the side of air inlet pipe 3, a diameter of 0.4-0.8mm of aperture,
The gas being blown into port grinding bottle 1 can be sufficiently mixed with alcohol water blend.
Then carry out 10s to port grinding bottle 1 to wash away, access gas chromatograph after washing away at escape pipe 4, that each tests enters
Tracheae 3 and escape pipe 4 are all new.Air inlet pipe 3 and escape pipe 4 are heated, obtains five parts of ethanol of reference solution at the A of first position
Chromatogram.Then control-rod 12 is set on horizon bar, keeps the level height of control-rod 12 constant, then move horizontally control
Bar 12, change the horizontal level of port grinding bottle 1, open air pump, obtain five parts of ethanol chromatograms of reference solution at the B of first position
Figure, continues to move horizontally control-rod 12, obtains each five parts of ethanol chromatograms with reference solution at D at the C of first position, one there are
To 20 parts of related ethanol chromatograms of first position, it can suitably increase first position varying level position according to actual conditions
The quantity of ethanol chromatogram.Then the ethanol for obtaining reference solution at first position by 20 parts of related ethanol chromatograms is averaged
Concentration, recorded, then remove horizon bar.
Control-rod 12 is set in vertical bar, vertically moves control-rod 12, changes port grinding bottle 1 in constant water bath box 5
Position, then at control-rod 12 rule, be recorded as the second place, then follow first position same procedure in the second place
20 parts of related ethanol chromatograms are obtained, then obtain second place reference solution by 20 parts of related ethanol chromatograms
Ethanol mean concentration, is recorded, and the ethanol for recording the reference solution of different longitudinal position at ten in constant water bath box 5 altogether is put down
Equal concentration, it then will obtain ethanol mean concentration and draw statistical chart, then by carrying out calculating average value, obtain the mark of reference solution
Quasi- concentration of alcohol.
(e) unified calibration expiration alcohol tester：Mobile control-rod 12, during port grinding bottle 1 is adjusted at constant water bath box 5
Between position, then fixed control-rod 12.Then alcohol tester is linked at escape pipe 4, visually observes the medium temperature of constant water bath box 5
The reading of meter is spent, it is 34 DEG C to control water bath with thermostatic control temperature, and bath temperature is controlled at ± 0.1 DEG C.Air inlet pipe 3 and escape pipe 4 are heated,
Air pump is opened, control air pump is pumped into the speed of gas, and the gas in port grinding bottle 1 is entered into tested expiration alcohol tests
The time control of instrument is in 10-15s.Gas in port grinding bottle 1 is entered in tested expiration alcohol tester, and operating personnel keep
Expiration alcohol tester horizontal stable, and read the reading of expiration alcohol tester.Then evacuation of air, to same expiration wine
Smart tester carries out retest, reads five readings, the average value of read off, calculates after decimal point three, exhaled as this
The test concentration of alcohol of gas alcohol tester, then by the test concentration of alcohol of the expiration alcohol tester and the mark of reference solution
Quasi- concentration of alcohol is compared, and determines error, expiration alcohol tester is calibrated according to error, using position regulator
Port grinding bottle 1 is maintained at same position in constant water bath box 5 by 6, unified that expiration alcohol tester is calibrated.It can be directed to and exhale
The calibration result of alcohol tester is printed, and prevents calibration result from forgeing, and a protective effect is so played to calibration data.
(f) tester is arranged.
The present invention is cooperated using clamping device 9 and support meanss 7, and port grinding bottle 1 is spacing in position regulator 6
On, moved by control-rod 12 on horizon bar so that port grinding bottle 1 is constant in the lengthwise position of constant water bath box 5, changes ground
Bottle 1 is in the lateral attitude of constant water bath box 5, and the five of the reference solution in the somewhere of constant water bath box 5 is obtained by gas chromatograph
Part ethanol chromatogram, obtains the ethanol mean concentration of the reference solution of the position；Control-rod 12 is set in vertical bar, and longitudinal direction is moved
Dynamic control-rod 12, changes lengthwise position of the port grinding bottle 1 in constant water bath box 5, and the lengthwise position after change uses same horizontal stroke
To moving method, the ethanol mean concentration of the reference solution of the position is obtained, the differentiation of lengthwise position mainly passes through control-rod 12
The line of place's diverse location makes a distinction；The ethanol mean concentration that lengthwise position is obtained draws statistical chart, then calculates longitudinal position
The average value of ethanol mean concentration is put, the graded alcohols concentration using the average value of acquirement as reference solution, thermostatted water can be excluded
The interference that diverse location bath temperature has differences in bath cabinet 5, the graded alcohols concentration of acquired reference solution have high
Reference value.
Port grinding bottle 1 is adjusted to centre position at constant water bath box 5 by the present invention, carries out one to expiration alcohol tester in batches
The test of cause property, test repeatability is good, by the test concentration of alcohol of expiration alcohol tester and the graded alcohols concentration of reference solution
It is compared, determines error, carry out unified calibration to expiration alcohol tester according to error, improves calibration accuracy, calibration knot
Fruit accurately and reliably, improves the measurement accuracy of expiration alcohol tester.
The degree of accuracy of the present invention is high, reliable and stable, simple to operate, practical, and alcohol water blend prepares simple, preservation
It is of long duration.
The specific embodiment of the present invention is these are only, but the technical characteristic of the present invention is not limited thereto.It is any with this hair
Based on bright, to solve essentially identical technical problem, essentially identical technique effect is realized, made simple change, etc.
With replacement or modification etc., all it is covered by among protection scope of the present invention.
Claims (5)
1. a kind of calibration method of expiration alcohol tester, it is characterised in that comprise the following steps：
(a) test environment is controlled：Control test environment is made as normal temperature including test cabinet temperature control, and controls indoor temperature ± 2 DEG C, surveys
Pressure testing is standard atmospheric pressure by force, and testing humidity is controlled in 20%-80%；
(b) reference solution is prepared：Absolute alcohol is put into mixing chamber, and adds distilled water mixing, the mixed liquor into mixing chamber
Design height, then control operation panel, turn on agitator, mixed solution are mixed, and obtain alcohol water blend, then by mixing chamber
On injection head stretch into port grinding bottle, and alcohol water blend is injected into port grinding bottle, after injection terminates, stoppers rubber stopper, made
For reference solution；
(c) port grinding bottle is put into constant water bath box：Port grinding bottle is placed on position regulator, with the bottom plate in support meanss
Port grinding bottle is supported, then controls push rod to move down clamping device, the clamping ring at clamping device clasps the neck of port grinding bottle, then will clamp
Device is locked, and port grinding bottle is locked in position regulator, position regulator then is put into constant temperature by control-rod
In water bath, 34 DEG C of setting water bath with thermostatic control temperature, port grinding bottle is placed into 20min and carries out equalized temperature；
(d) reference solution graded alcohols concentration is obtained：Mobile control-rod, port grinding bottle is controlled in constant water bath box setting position,
And rule at control-rod, first position is recorded as, then air pump set in advance is accessed at air inlet pipe, then to port grinding bottle
Carry out 10s to wash away, access gas chromatograph after washing away at escape pipe, heat air inlet pipe and escape pipe, obtain at the A of first position
Five parts of ethanol chromatograms of reference solution, then control-rod is set onto horizon bar, keep control-rod level height constant, so
After move horizontally control-rod, change the horizontal level of port grinding bottle, open air pump, obtain five of reference solution at the B of first position
Part ethanol chromatogram, continues to move horizontally control-rod, obtains each five parts of ethanol chromatograms with reference solution at D at the C of first position
Figure, one is obtained 20 parts of related ethanol chromatograms of first position, then obtains the by 20 parts of related ethanol chromatograms
The ethanol mean concentration of one opening position reference solution, is recorded, and then removes horizon bar, and control-rod is set and arrives vertical bar
On, control-rod is vertically moved, changes position of the port grinding bottle in constant water bath box, then rule at control-rod, it is recorded as second
Position, then follow first position same procedure and 20 parts of related ethanol chromatograms are obtained in the second place, then pass through two
Ten parts of related ethanol chromatograms obtain the ethanol mean concentration of second place reference solution, are recorded, record constant temperature altogether
The ethanol mean concentration of the reference solution of different longitudinal position at ten in water bath, it then will obtain ethanol mean concentration and draw system
Meter figure, then by carrying out calculating average value, obtain the graded alcohols concentration of reference solution；
(e) unified calibration alcohol tester：Mobile control-rod, port grinding bottle is adjusted to centre position at constant water bath box, then it is solid
Determine control-rod, then alcohol tester is linked at escape pipe, visually observe the reading of thermometer in constant water bath box, control
Water bath with thermostatic control temperature is 34 DEG C, heating air inlet pipe and escape pipe, unlatching air pump, and the gas in port grinding bottle enters tested wine
In smart tester, operating personnel keep alcohol tester horizontal stable, and read the reading of alcohol tester, and then emptying is empty
Gas, retest is carried out to same alcohol tester, reads five readings, the average value of read off, as the alcohol screen test
The test concentration of alcohol of instrument, then the graded alcohols concentration of the test concentration of alcohol of the alcohol tester and reference solution is carried out
Compare, determine error, alcohol tester is calibrated according to error, port grinding bottle is maintained at by constant temperature using position regulator
Same position in water bath is unified that alcohol tester is calibrated；
(f) tester is arranged.
A kind of 2. calibration method of expiration alcohol tester according to claim 1, it is characterised in that：It is permanent in step (c)
Warm water bath cabinet under specified input voltage before use, run 1 and a half hours, then test voltage, is monitored defeated using voltmeter
Enter power, make the degree of accuracy of voltage in the range of ± 2%.
A kind of 3. calibration method of expiration alcohol tester according to claim 1, it is characterised in that：It is permanent in step (c)
Warm water bath cabinet to constant water bath box before use, carry out electrical safety detection.
A kind of 4. calibration method of expiration alcohol tester according to claim 1, it is characterised in that：The tail end of air inlet pipe
Shut with pipe sleeve, then 20-30 aperture is opened up in the side of air inlet pipe, the gas being blown into port grinding bottle is filled with alcohol water blend
Divide mixing.
A kind of 5. calibration method of expiration alcohol tester according to claim 1, it is characterised in that：In step (e), control
Air pump processed is pumped into the speed of gas, and the gas in port grinding bottle is entered to the time control of tested alcohol tester in 10-
15s。
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| US10877008B2 (en) * | 2016-09-09 | 2020-12-29 | Consumer Safety Technology, Llc | Reference gas management in a breath alcohol calibration station |
| US10663440B2 (en) | 2016-09-09 | 2020-05-26 | Consumer Safety Technology, Llc | Secure data handling in a breath alcohol calibration station |
| CN110806554B (en) * | 2019-11-11 | 2021-08-13 | 广西电网有限责任公司桂林供电局 | Calibration method of PVC cable gas detector |
| CN111537755A (en) * | 2020-05-11 | 2020-08-14 | 佳思德科技(深圳)有限公司 | Comparison verification method for alcohol standard gas generated by generating device |
| CN111610337A (en) * | 2020-05-20 | 2020-09-01 | 佳思德科技(深圳)有限公司 | Alcohol detector calibrating device and method for displaying current calibration allowable error |
| CN113721007A (en) * | 2021-09-01 | 2021-11-30 | 福建省计量科学研究院（福建省眼镜质量检验站） | Calibration method and device for rapid screening type alcohol detector |
| CN115575618B (en) * | 2022-09-28 | 2023-08-25 | 广州逆熵电子科技有限公司 | Continuous standard concentration gas generator and use method thereof |
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