CN208334343U - A kind of Water Test Kits calibrator (-ter) unit - Google Patents
A kind of Water Test Kits calibrator (-ter) unit Download PDFInfo
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- CN208334343U CN208334343U CN201721620155.0U CN201721620155U CN208334343U CN 208334343 U CN208334343 U CN 208334343U CN 201721620155 U CN201721620155 U CN 201721620155U CN 208334343 U CN208334343 U CN 208334343U
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Abstract
本实用新型公开了一种水质分析仪校准设备，包括上位机、第一控制模块A、第二控制模块B、第三控制模块C、电路控制板、溶液混合池(1)、混合池进液管(2)、Y型三通(3)、第一注射泵(4)、第二注射泵(5)、蠕动泵(6)、电磁搅拌器(7)、检测液管(8)，本实用新型不仅配液精度高，同时能够对水质在线分析仪自动校准。
The utility model discloses a water quality analyzer calibration equipment, comprising a host computer, a first control module A, a second control module B, a third control module C, a circuit control board, a solution mixing tank (1), and the mixing tank inlet liquid Tube (2), Y-shaped tee (3), first syringe pump (4), second syringe pump (5), peristaltic pump (6), electromagnetic stirrer (7), detection liquid tube (8), this The utility model not only has high liquid dispensing accuracy, but also can automatically calibrate the water quality online analyzer.
Description
Technical field
The utility model relates in a kind of calibrating installation design method more particularly to a kind of Water Test Kits calibrating installation
The design of self-checking device.
Background technique
In environment water monitoring system, generally water body parameter is detected using online water analysis instrument, online water
Whether the detection accuracy of matter analyzer meets national verification regulatory requirements, general to use the manually metering to online water analysis instrument
Performance is calibrated, and the long period (generally requiring 36 hours) of artificial detection in-line analyzer.Therefore there is an urgent need to one
Kind unattended can be to the technology that Water Test Kits is calibrated.
Utility model content
Purpose of utility model: in order to overcome the deficiencies in the prior art, the utility model provides a kind of with liquid precision
Height, the Water Test Kits calibrator (-ter) unit and calibration method calibrated automatically.
Technical solution: to achieve the above object, the technical solution adopted in the utility model are as follows:
A kind of Water Test Kits calibrator (-ter) unit, including host computer, the first control module A, the second control module B, third control
Molding block C, circuit control panel, solution mixing pit (1), mixing pit inlet tube (2), Y-type three way type (3), the first syringe pump (4),
Two syringe pumps (5), peristaltic pump (6), magnetic stirrer (7), detection liquid pipe (8), in which:
The Y-type three way type (3) be two import one outlets pipe fitting, respectively the first inlet tube, the second inlet tube with
And first outlet pipe, the liquid feeding end of first syringe pump (4) are used to connect by the first inlet tube (41) with standard mother liquid multi-cavity bottle,
And outlet end is connect by the first outlet tube (42) with the first inlet tube of Y-type three way type (3), and first inlet tube and first
Junction between outlet tube (42) is provided with the first feed liquor check valve (43) for preventing liquid reflux；First inlet tube
(41) being provided on prevents the first of liquid reflux to go out liquid check valve (44)；The liquid feeding end of second syringe pump (5) is for leading to
The second inlet tube (51) is crossed to connect with dilution bottle, and outlet end by the second outlet tube (52) and Y-type three way type (3) second into
Mouth pipe connection, and the junction of second inlet tube and the second outlet tube (52) is provided with the second feed liquor for preventing liquid reflux
Check valve (53), and liquid check valve (54) and the second inlet tube are sequentially connected out for second outlet tube (52), second；It is described
First, which goes out liquid check valve (44), closes liquid check valve (44) outlet out less than 4 times first distance L that mouth is exported to the first inlet tube
End pipe diameter R；Being provided on second inlet tube (51) prevents the second of liquid reflux to go out liquid check valve (54)；Described first goes out
Mouth pipe is connected to by mixing pit inlet tube (2) with the feed pathway (111) of solution mixing pit (1)；Solution mixing pit (1) packet
It includes with open major trough body (11), slot cover (12), the slot cover (12) is used to cover the opening in major trough body (11), closing
Major trough body (11), the shape of the hollow groove of the major trough body (11) are infundibulate, and it is logical that feed liquor is provided on the major trough body (11)
Road (111), detection liquid flow pass (112) and apocenosis passage (113), during the inlet of the apocenosis passage (113) is located at
The bottom of empty slot, and the inlet of the feed pathway (111) is higher than the inlet of detection liquid flow pass (112), while institute
State inlet of the inlet lower than detection liquid flow pass (112) of apocenosis passage (113), the detection liquid flow pass
(112) for being connected to by detecting liquid pipe (8) with Water Test Kits inlet；The magnetic stirrer (7) includes that electromagnet is solid
Reservation (71), electromagnet (72), stirrer (73), the electromagnet fixing seat (71) are used to electromagnet (72) being fixed on major trough
The bottom of body (11), and the stirrer (73) is set in hollow groove；The host computer respectively with the first control module A,
Two control module B, third control module C, circuit control panel and Water Test Kits connection, and the first control module A with
First syringe pump (4) connection, the second control module B are connect with the second syringe pump (5), third control module C and peristaltic pump (6)
Connection, the peristaltic pump (6) are used to that the interior solution of solution mixing pit (1) to be discharged by apocenosis passage (113), the circuit control
Plate is connect with magnetic stirrer (7).
The first control signal control the first syringe pump (4) that the first control module A is used to be issued according to host computer is inhaled
It takes and push operation, first syringe pump (4) is for drawing standard mother liquid multi-cavity bottle according to first control signal, after absorption
Liquid is pushed in solution mixing pit (1) according to first control signal；
The second control signal control the second syringe pump (5) that the second control module B is used to be issued according to host computer is inhaled
It takes and push operation, second syringe pump (5) is used to draw dilution bottle according to second control signal, liquid after absorption
Body is pushed in solution mixing pit (1) according to second control signal；
Third control signal control peristaltic pump (6) that the third control module C is used to be issued according to host computer is to solution
Mixing pit (1) is aspirated；
The 4th control signal control magnetic stirrer (7) that the circuit control panel is used to be issued according to host computer is stirred
It mixes；
The Water Test Kits is used to detect the liquid come in from detection liquid pipe (8), and will test result upload
To host computer；
The host computer is used for the first control module A, the second control module B, third control module C and circuit control
Plate issues first control signal, second control signal, third control signal and the 4th control signal；The host computer is used simultaneously
In the testing result for receiving Water Test Kits, and the water quality point is obtained with the technical indicator of state verification regulation according to testing result
The judgement of analyzer is reported.
It is preferred: to be provided with star-like handle nut (121) on the slot cover (12).
Preferred: the place that the slot cover (12) is in contact with opening is provided with sealing ring.
It is preferred: to be provided with fixed block hole (711) on the electromagnet fixing seat (71)；Drain pipe is logical across fixing seat
Hole (711) is connected to apocenosis passage (113), and peristaltic pump (6) are provided on the drain pipe.
Preferred: described second, which goes out liquid check valve (54), closes distance L that mouth is exported to the second inlet tube less than 4 times second
Liquid check valve (54) outlet end caliber R out.
A kind of automatic calibrating method of Water Test Kits calibrator (-ter) unit, comprising the following steps:
Step 1, testing staff connects the host computer communication port of the PORT COM of detected Water Test Kits and calibrating installation
It connects, the sampling system of detected Water Test Kits and detection liquid pipe (8) is attached；
Step 2, the standard mother liquid multi-cavity bottle equipped with standard solution mother liquor is connected to the first inlet tube (41)；Dilution will be housed
Dilution bottle be connected to the second inlet tube (51)；Solution concentration after the concentration and dilution of standard solution mother liquor is input to
Host computer；
Step 3, host computer calculates according to the solution concentration after the concentration and dilution of standard solution mother liquor and obtains standard solution
The amount of mother liquor and the amount of dilution, and then obtain the first syringe pump (4) amount of feed and the second syringe pump (5) amount of feed；Host computer
First control signal is issued to the first control module A according to the first syringe pump (4) amount of feed, is fed according to the second syringe pump (5)
It measures to the second control module B and issues second control signal, host computer issues the 4th control signal to circuit control panel；
Step 4, the first control module A controls the first syringe pump (4) according to first control signal and draws from standard mother liquid multi-cavity bottle
Standard solution mother liquor；Second control module B controls the second syringe pump (5) and draw from dilution bottle according to second control signal to be diluted
Liquid；Second control module B controls the second syringe pump (5) according to second control signal and first infuses dilution to solution mixing pit (1)
Enter, then the first control module A controls the first syringe pump (4) according to first control signal and mixes standard solution mother liquor to solution
Pond (1) injection, and standard solution mother liquor has at least injected when dilution injection is completed；
Step 5, circuit control panel is stirred drive to stirrer (73) according to the 4th control signal control electromagnet (72)
It is dynamic, and then the liquid in solution mixing pit (1) is stirred；
Step 6, after the completion of solution is prepared, computer sends sampling instruction to detected Water Test Kits, is detected water quality
Analyzer carries out sampling operation to solution in solution mixing pit (1) after receiving instruction, is detected point of the Water Test Kits by water quality
Analysis information is uploaded to host computer；
Step 7, host computer analyzes detected Water Test Kits according to the analysis information for being detected Water Test Kits
The automatic calibration of detection.
Preferred: host computer carries out the error of indication, null offset, stability of display's analysis work to detected Water Test Kits
Make.
The utility model compared with prior art, has the advantages that
The utility model can be high with liquid precision, while can calibrate automatically to water quality online analyzer.
Detailed description of the invention
Fig. 1 is the principles of the present invention schematic diagram；
Fig. 2 is the workflow schematic diagram of the utility model；
Fig. 3 is the structural schematic diagram of the utility model；
Specific embodiment
In the following with reference to the drawings and specific embodiments, the utility model is furtherd elucidate, it should be understood that these examples are only used for
Bright the utility model rather than limitation the scope of the utility model, after having read the utility model, those skilled in the art
Member falls within the application range as defined in the appended claims to the modification of the various equivalent forms of the utility model.
A kind of Water Test Kits calibrator (-ter) unit, as shown in Figure 1-3, include host computer, the first control module A, the second control
Module B, third control module C, circuit control panel, solution mixing pit 1, mixing pit inlet tube 2, Y-type three way type 3, the first syringe pump
4, the second syringe pump 5, peristaltic pump 6, magnetic stirrer 7, detection liquid pipe 8, in which:
The Y-type three way type 3 be two import one outlets pipe fitting, respectively the first inlet tube, the second inlet tube and
First outlet pipe, the liquid feeding end of first syringe pump 4 is used to connect by the first inlet tube 41 with standard mother liquid multi-cavity bottle, and liquid out
End is connect by the first outlet tube 42 with the first inlet tube of Y-type three way type 3, and first inlet tube and the first outlet tube 42 it
Between junction be provided with the first feed liquor check valve 43 for preventing liquid reflux.Being provided on first outlet tube 42 prevents liquid
The first of body reflux goes out liquid check valve 44.The liquid feeding end of second syringe pump 5 is used to pass through the second inlet tube 51 and dilution
Bottle connection, and outlet end is connect by the second outlet tube 52 with the second inlet tube of Y-type three way type 3, and second inlet tube and
The junction of second outlet tube 52 is provided with the second feed liquor check valve 53 for preventing liquid reflux.It is set on second inlet tube 51
Being equipped with prevents the second of liquid reflux to go out liquid check valve 54.
The purpose that Y-type three way type 3 is arranged mainly is reduced between the first syringe pump 4, the second syringe pump 5 and solution mixing pit 1
Length of pipe increased if the first syringe pump 4, the second syringe pump 5 are connected to two root canal roads with solution mixing pit 1 respectively
Dead volume in pipeline influences the configuration precision of solution, therefore the utility model is merged two root canal roads using Y-type three way type 3
At a root canal road, the length of pipeline is reduced, thereby reduces the dead volume in pipeline, improves the configuration precision of solution.
First goes out there are two the purposes that liquid check valve 44 is arranged, and first is to prevent liquid from flowing back from Y-type three way type 3, another
It is, when the first outlet of liquid check valve 44 out less than 4 times first distance L that the closing mouth of liquid check valve 44 is exported to the first inlet tube out
When end pipe diameter R, first, which goes out liquid check valve 44 and the first inlet tube, exports to form turbulence structure, when the first liquid stops to mixing pit
When inlet tube 2 flows into, goes out the closing mouth of liquid check valve 44 first and have the first liquid between the outlet of the first inlet tube, when second
Liquid continues through Y-type three way type 3 and flows into mixing pit inlet tube 2, due to there is folder between the first inlet tube, the second inlet tube
Angle is collided so that rushing at the outlet of the first inlet tube from the second liquid that the second inlet tube flows out with the outlet of the first inlet tube,
Second liquid after collision forms turbulent flow, within and around the outlet of the first inlet tube of agitation, first go out it is molten in liquid check valve 44
Liquid, and then enter first and go out in liquid check valve 44, when turbulent flow to first, which goes out liquid check valve 44, closes mouth, due to closing mouth
Stop, turbulent flow returns, and the solution that first goes out in liquid check valve 44 is taken in the return of turbulent flow out of, and then realizes that first goes out liquid check valve
The exchange of solution in 44 goes out liquid check valve 44 for first and closes mouth to the first liquid having between the outlet of the first inlet tube
It is gradually diluted and is taken out of by the effect of turbulent flow, the influence for avoiding Liquid Residue from preparing solution, and then improve the configuration precision of solution.
Similarly know the second setting purpose for going out liquid check valve 54.
Described first goes out the closing mouth of liquid check valve 44, and to the distance L that the first inlet tube exports, less than 4 times first, liquid is unidirectional out
Valve 44 outlet end caliber R, described second, which goes out liquid check valve 54, closes distance L that mouth is exported to the second inlet tube less than 4 times second
54 outlet end caliber R of liquid check valve out.The distance of the first distance L that the closing mouth of liquid check valve 44 is exported to the first inlet tube out is got over
It is short better, distance it is shorter, turbulent flow is bigger, can preferably contradict second go out liquid check valve 54 close mouth at solution.
As long as Y-type three way type 3 guarantees between the first inlet tube, the second inlet tube that best angle is there are angle
45 °, using PTEF material, the Y-type three way type of special angle make the connecting line in calibrating installation is as short as possible, dead volume as far as possible
It is small.
Using PTEF material, the Y-type three way type of special angle makes that the connecting line in calibrating installation is as short as possible, dead volume is most
It may be small.Due to being provided with, the first feed liquor check valve 43, first goes out liquid check valve 44, the second feed liquor check valve 53, second goes out liquid
Check valve 54, so that the first syringe pump 4, the second syringe pump 5, when extracting test solution, push pipe test solution will not flow back.Check valve is adopted
With PTEF material, diaphragm material is fluorubber, latus rectum 2mm, pressure-resistant 0.8mpa.
In addition, due to the junction of the second inlet tube and the second outlet tube 52 be provided with prevent the second of liquid reflux into
Liquid check valve 53, thus when the second syringe pump 5 stop inject when, the first syringe pump 4 also injection when, due to the first inlet tube,
There are angle between second inlet tube, the dilution entered from the first inlet tube can rinse the second inlet tube under the effect of the pressure
Water export avoid so that the standard mother liquor in the second inlet tube in dead volume flows out under the flushing of dilution
The dead volume of two inlet tube outlet ports is influenced with liquid precision.
The first outlet pipe is connected to by mixing pit inlet tube 2 with the feed pathway 111 of solution mixing pit 1.It is described molten
Liquid mixing pit 1 includes with open major trough body 11, slot cover 12, and the slot cover 12 is used to cover the opening in major trough body 11, envelope
Major trough body 11 is closed, star-like handle nut 121 is provided in the slot cover 12, the place that the slot cover 12 is in contact with opening is arranged
There is sealing ring.The shape of the hollow groove of the major trough body 11 is infundibulate, be provided on the major trough body 11 feed pathway 111,
Detect liquid flow pass 112 and apocenosis passage 113, the inlet of the apocenosis passage 113 is located at the bottom of hollow groove, and institute
The inlet for stating feed pathway 111 is higher than the inlet of detection liquid flow pass 112, while the feed liquor of the apocenosis passage 113
For mouth lower than the inlet of detection liquid flow pass 112, the detection liquid flow pass 112, which is used to pass through, detects liquid pipe 8 and water quality
The connection of analyzer inlet.
The utility model is set to the bottom of hollow groove using feed pathway 111, so that dilution and standard mother liquor are from molten
1 bottom of liquid mixing pit enters solution mixing pit 1, when preventing stirrer 73 from rotating in this way, dilution and standard mother liquor is beaten and is flown
On 1 inner wall of solution mixing pit, the mixed-precision of solution is influenced.In addition, stirrer is just opened when having solution in solution mixing pit 1
Beginning work accelerates mixing velocity to mix test solution.The utility model carries out mixing pit from bottom of pond portion using solution, while top adds
Lid, this structure can reduce the influence of the evaporation of solution, mixing pool wall solution wall built-up phenomenon to precision preparation.
The detection liquid flow pass 112 of the utility model is similarly provided at the bottom of hollow groove, and pipeline is close in a manner of pressure ring
It seals and connects, the stability of solution utilization rate and pipeline can be improved in this structure.In addition this structure can be in stirrer 73 also in work
It when making, can be sampled from solution mixing pit 1, when avoiding stirrer 73 and stopping working, mixed solution generates depositional phenomenon, influences
To the analysis of Water Test Kits.In addition, to remove the waste sample of front half section when being sampled from detection liquid flow pass 112, prevent from detecting
Dead volume residual in liquid flow pass 112, detection liquid pipe 8, influences the analysis of Water Test Kits.
The inlet of apocenosis passage 113 is set to the bottom of hollow groove, it can be ensured that the abundant discharge of waste liquid.
The magnetic stirrer 7 includes electromagnet fixing seat 71, electromagnet 72, stirrer 73, the electromagnet fixing seat
71 for electromagnet 72 to be fixed on to the bottom of major trough body 11, and the stirrer 73 is set in hollow groove.
The utility model uses magnetic stirrer 7, and there are two purposes, and one is to speed up the mixing of solution, and two are to speed up major trough
The drying of body 11.In solution mixing, since stirrer 73 rotates under the effect of electromagnet 72, by the rotation of stirrer 73,
So that solution mixes more evenly.When dry, rotated by stirrer 73 and generate wind, the wind of generation in major trough body 11 in
Empty slot rotation, accelerates the evaporation of solution on 11 inner wall of major trough body, then by the swabbing action of peristaltic pump 6, by humid air from master
Groove body 11 is extracted out, therefore accelerates the drying of major trough body 11, and raffinate is avoided to influence the configuration precision of solution next time.
The host computer respectively with the first control module A, the second control module B, third control module C, circuit control panel
And Water Test Kits connection, and the first control module A is connect with the first syringe pump 4, the second control module B and the second note
5 connection of pump is penetrated, and third control module C is connect with peristaltic pump 6, and the peristaltic pump 6 is used to solution is mixed by apocenosis passage 113
Solution is discharged in pond 1, and the circuit control panel is connect with magnetic stirrer 7.
The first control signal that the first control module A is used to be issued according to host computer controls the first syringe pump 4 and draws
And push operation, first syringe pump 4 is for drawing standard mother liquid multi-cavity bottle according to first control signal, liquid after absorption
It is pushed in solution mixing pit 1 according to first control signal.
The second control signal that the second control module B is used to be issued according to host computer controls the second syringe pump 5 and draws
And push operation, second syringe pump 5 is for drawing dilution bottle according to second control signal, liquid root after absorption
It is pushed in solution mixing pit 1 according to second control signal.
The third control signal control peristaltic pump 6 that the third control module C is used to be issued according to host computer is mixed to solution
Pond 1 is closed to be aspirated；
The 4th control signal control magnetic stirrer 7 that the circuit control panel is used to be issued according to host computer is stirred
It mixes；
The Water Test Kits is used to detect the liquid come in from detection liquid pipe 8, and will test result and be uploaded to
Host computer；
The host computer is used for the first control module A, the second control module B, third control module C and circuit control
Plate issues first control signal, second control signal, third control signal and the 4th control signal；The host computer is used simultaneously
In the testing result for receiving Water Test Kits, and the water quality point is obtained with the technical indicator of national verification regulation according to testing result
The judgement of analyzer is reported.
A kind of water quality online analyzer calibration method, comprising the following steps:
Step 1, testing staff connects the host computer communication port of the PORT COM of detected Water Test Kits and calibrating installation
It connects, the sampling system of detected Water Test Kits and detection liquid pipe 8 is attached.
Step 2, the standard mother liquid multi-cavity bottle equipped with standard solution mother liquor is connected to the first inlet tube 41；Dilution will be housed
Dilution bottle is connected to the second inlet tube 51；Solution concentration after the concentration and dilution of standard solution mother liquor is input to upper
Machine.
Step 3, host computer calculates according to the solution concentration after the concentration and dilution of standard solution mother liquor and obtains standard solution
The amount of mother liquor and the amount of dilution, and then obtain 5 amount of feed of 4 amount of feed of the first syringe pump and the second syringe pump；Host computer according to
First syringe pump, 4 amount of feed issues first control signal to the first control module A, according to 5 amount of feed of the second syringe pump to second
Control module B issues second control signal, and host computer issues the 4th control signal, to the second control module B to circuit control panel
Issue the 4th control signal.
Step 4, the first control module A controls the first syringe pump 4 according to first control signal and draws mark from standard mother liquid multi-cavity bottle
Quasi- solution mother liquor；Second control module B controls the second syringe pump 5 according to second control signal and draws dilution from dilution bottle；
Second control module B controls the second syringe pump 5 according to second control signal and first injects dilution to solution mixing pit 1, then
First control module A controls the first syringe pump 4 according to first control signal and injects standard solution mother liquor to solution mixing pit 1,
And standard solution mother liquor has at least injected when dilution injection is completed.
Step 5, circuit control panel is stirred driving to stirrer 73 according to the 4th control signal control electromagnet 72, into
And the liquid in solution mixing pit 1 is stirred.
Step 6, after the completion of solution is prepared, computer sends sampling instruction to detected Water Test Kits, is detected water quality
Analyzer carries out sampling operation to solution in solution mixing pit 1 after receiving instruction, is detected Water Test Kits for the analysis of water quality
Information is uploaded to host computer；And the analysis work such as carry out the error of indication, null offset, stability of display, after the completion of analysis will point
Analysis data are sent to computer.
Step 7, host computer analyzes detected Water Test Kits according to the analysis information for being detected Water Test Kits
The automatic calibration of detection, and judgement report is generated, data result can trace to the source.
Automatic calibration refers to the communications protocol that calibrating installation is provided by water quality online analyzer manufacturing enterprise, realization pair
The instruction transmission of instrument and data receiver, by preset program complete to " error of indication " of instrument, " null offset ",
The detection work of projects such as " stability of display ", calibration item can be adjusted according to by the difference of test examination instrument, be not limited to above-mentioned
Three.Automatically it refers to after experimenter selects to carry out experiment option, in entire calibration process, without artificial replacement examination
Agent, without it is artificial it is on duty, be not necessarily to manual record data.Whole process is automatically performed by calibrating installation.
The host computer includes the error of indication, null offset, indicating value to the project of detected Water Test Kits analysis detection
Stability.
The testing process and calculation method (COD) of 7.1 errors of indication
After Water Test Kits stable operation, successively importing mass concentration is CSThe COD standard of (50,150,500mg/L)
Solution measures respectively, and every kind of solution continuously measures 3 times, and the error of indication is calculated as follows:
Wherein, Δ C indicates the error of indication,It indicates to be detected Water Test Kits measurement of concetration average value, CSAfter indicating dilution
Solution concentration.
The testing process and calculation method (COD) of 7.2 null offsets:
After Water Test Kits stable operation, it is mixed to solution that the first syringe pump 4, the second syringe pump 5 are controlled by computer
It closes pond 1 and prepares zero point correction liquid, prepared zero point correction liquid is imported and is detected Water Test Kits measurement zero point correction liquid,
Record the initial zero value Z of measurement0, a zero point correction liquid is imported to detected Water Test Kits every 30min in 4h, is measured
Zero point indicating value Zi, take and deviate Z0Maximum zero point indicating value ZiAs maximum zero point indicating value Zmax, by maximum zero point indicating value ZmaxWith it is first
Beginning zero Z0Difference as null offset.
7.3 show the testing process and calculation method (COD) for referring to stability:
After Water Test Kits stable operation, it is mixed to solution that the first syringe pump 4, the second syringe pump 5 are controlled by computer
It closes pond 1 and prepares Standard Calibration Solutions；Prepared Standard Calibration Solutions are imported to detected Water Test Kits, record initial survey
Magnitude S0, continuous operation is for 24 hours；A Standard Calibration Solutions are imported to detected Water Test Kits every 1h interior for 24 hours, are measured
Magnitude Si takes and deviates the maximum measured value Si of initial measurement S0 as greatest measurement Smax, shows according to following formula calculating
It is worth stability:
Δ S indicates stability of display, SmaxIndicate greatest measurement, S0Indicate initial measurement.
The error of indication, null offset, stability of display's index are to measure the evaluation index of specification Instrumental metering performance, people
When work is evaluated, needs artificial 40 hours on duty and handle data, this calibrating installation is alternative to be manually automatically performed above-mentioned metering performance
Appraisal.
The utility model is to the same Water Test Kits to be detected corresponding difference of different detection project in the detection process
The replacement of the detection solution of concentration realizes that there is no need to manually replace examination by the automatic function equipment of solution of calibrating installation
Agent, at the same the utility model using same device proportion various concentration detection solution, reduce null offset, stability of display and
The human error of error of indication testing result.
In addition the host computer of the utility model can use computer or other central processing units, and each function can pass through
It is based on Windows And WinOperating system is realized, transmittable to do sample instruction and receive data, and will
Data processing calculate after formed report and can provide Water Test Kits to be detected whether He Ge conclusion.
Step 8, after the completion of some detectable concentration solution detects, host computer issues third control to third control module C
Signal, third control module C control peristaltic pump and the waste liquid in solution mixing pit are discharged, and waste liquid closes peristaltic pump after excluding, into
The preparation of the next detectable concentration point of row；
It further include to the cleaning of solution mixing pit and dry, side before next detectable concentration point is prepared after waste liquid discharge
Method is as follows: control template B controls the second syringe pump 5 and draws dilution from dilution bottle, is injected into solution mixing pit 1, upper
Machine issues the 4th control signal to circuit control panel, and starting magnetic stirrer 7 cleans solution mixing pit 1, and cleaning finishes,
Signal, which is controlled, by third controls peristaltic pump discharge, so cleaning 3 times or more；It is opened finally, controlling signal control by third
Peristaltic pump, by the 4th control signal enabling magnetic stirrer 7, so that stirrer 73 rotates, and then quickly dry solution is mixed
Close pond 1.
The solution uncertainty that the utility model is diluted based on calibrating installation less than 3% (k=2), and can by with
The mode that national grade ii standard substance compares is traced to the source to National primary standard, therefore its Data Data result can trace to the source.
In the present embodiment, first syringe pump 4 of the utility model and the second syringe pump 5 use constant displacement pump, the quantitative pump housing
Product: 10ml, when constant displacement pump specification selects between 5ml, 10ml and 25ml, experiments have shown that quantitative injection pump uses two 10ml's
Specification, operability, the precision highest of solution preparation.Constant displacement pump precision: 2uL/ step.Constant displacement pump motor speed can be according to practical need
It adjusts, this instrument uses speed for 30 revs/min (adjustable), experiments have shown that the pump under the speed pushes volume accuracy highest.
Reset mode: constant displacement pump is mounted with optoelectronic switch in maximum push point (i.e. reset position), first with constant displacement pump before liquid
It resets, to guarantee before preparing solution every time, without being full of dilution in remaining liquid, each pipeline in constant displacement pump.
Remaining liquid control in pipeline: in process for preparation, when carrying out constant displacement pump push, pipeline remains that liquid is full of
State, and by program optimization, remain that the push of mother liquor is first completed, the push of dilution finally completes, and guarantees pipeline
The liquid being inside full of is always dilution (pure water), improves and prepares repdocutbility, to achieve the purpose that control precision.
While taking into account efficiency, the pipeline of latus rectum 2mm is selected, connecting line overall length is short as far as possible, and caliber is as small as possible, subtracts
Few dead volume.Each component is by high temperature resistant, the polytetrafluoro pipe connection of soda acid, and pipe interface is by the way of pressure ring sealing, therefore
Junction contact area is small, and dead volume is small.Compared with raw material band sealing means, leakproofness is more reliable, and operability is more convenient, whole
It is a make sample during, this connection type is completely fixed pipeline, non-loosening phenomenon, reduce detection failure rate.Polytetrafluoro pipe ruler
Very little is 2.85*1.25mm.
Calibrating installation matches liquid, examines through potassium bichromate solution absorbance, and solution prepares error and is less than ± 2%, whole system
There are system deviations, and repeated property test is when host computer generates first control signal and second control signal at this time, middle introducing
System improvement factor K can reduce mechanical liquid mixing system error, so that global error is better than ± 1%.Specific prioritization scheme are as follows:
Compound concentration is c0Potassium bichromate solution mother liquor measures solution absorbance A at 440nm0, existed using calibrating installation
Solution is prepared under different distribution ratios, the theoretical absorbance A of solution is calculated using distribution ratios1-Asi, reality is measured under similarity condition
Border absorbance AX1-AXi, calculate the improvement factor K under different distribution ratios1-Ki, when matching solution, consider this improvement factor, rise
To the effect for reducing systematic error.Improvement factor K stablizes within x months time, can be again after calibrating installation long-play
The absorbance time is carried out, improvement factor is adjusted.
Theoretical thinner ratio in(x:y) refer to that the first syringe pump 4 draws the absorption dilution of the x: the second syringe pump of volume 5 of mother liquor
The volume y of liquid.
Thinner ratio in=x/ (x+y)
Theoretical absorbance Asi=A0*in, solution theory concentration c after dilutionsi=c0*in,
Systematic correction factor Ki=Axi/Asi
Practical compound concentration cxi=Ki*csi
Practical thinner ratio ln=Kiin
Repeated data through test of many times are respectively to KiIt is calculated, when mother liquid concentration is fixed, and selects specific objective
Solution concentration ciWhen, first calculate theoretical distribution ratio in, reuse KiIt is modified, thinner ratio I after amendmentn.The is generated in host computer
Thinner ratio I is added when one control signal and second control signaln, change the stepper motor steps of quantitative injection pump to change dv
Value, In=(x+dv)/(x+dv+y-dv), the solution concentration error prepared after correcting at this time reduce systematic error part.
The water quality online analyzer of the utility model includes being not limited to COD (COD) in-line analyzer, ammonia nitrogen
In-line analyzer etc. is joined applied to the live non-laboratory of water head site, discharge of industrial wastes mouth, water body environment monitoring point using water quality
Number analysis instrument.
The utility model can one be pushed to field calibration Water Test Kits, the mobility of calibrating installation ensures analysis
When solution it is ready-to-use, compared with traditional artificial preparation solution is brought to field assay, it is no longer necessary to consider low concentration detect
The site requirements that the preservation problem and solution of solution are prepared, it is higher that solution prepares reproducibility.
The utility model realizes the Full-automatic calibration to water quality online analyzer, it is unattended according to predetermined criteria
Or (such as national metrological verification regulations, the technical specifications such as calibrating standard) are required, to all measuring indexs of water quality online analyzer
A series of continuous continual analysis tests are carried out, data is acquired and is analyzed and processed, and determine whether calibration result accords with
Relevant index request is closed, corresponding original calibrated report is generated.The reserved output port with external data communication, realizes calibration
As a result long-range, which acquires, to be prepared.Whole process realizes intelligent processing, is not necessarily to manual intervention completely.Meanwhile device has certainly
The function of dynamic maintenance, running clearance or standby mode being capable of automatic clean and maintenance, lifting device reliability of operation and stabilization
Property.
The above is only the preferred embodiment of the utility model, it should be pointed out that: for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (5)
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| CN201721620155.0U CN208334343U (en) | 2017-11-28 | 2017-11-28 | A kind of Water Test Kits calibrator (-ter) unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487115A (en) * | 2020-03-26 | 2020-08-04 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Pneumatic solution dilution and distribution device |
| CN112345690A (en) * | 2020-11-17 | 2021-02-09 | 西安热工研究院有限公司 | Reverse osmosis water inflow scaling critical point detection system and method |
-
2017
- 2017-11-28 CN CN201721620155.0U patent/CN208334343U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487115A (en) * | 2020-03-26 | 2020-08-04 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Pneumatic solution dilution and distribution device |
| CN111487115B (en) * | 2020-03-26 | 2021-03-26 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Pneumatic solution dilution and distribution device |
| CN112345690A (en) * | 2020-11-17 | 2021-02-09 | 西安热工研究院有限公司 | Reverse osmosis water inflow scaling critical point detection system and method |
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Granted publication date: 20190104 |