CN103412091B - pH value measuring method and device - Google Patents

pH value measuring method and device Download PDF

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CN103412091B
CN103412091B CN201310366931.9A CN201310366931A CN103412091B CN 103412091 B CN103412091 B CN 103412091B CN 201310366931 A CN201310366931 A CN 201310366931A CN 103412091 B CN103412091 B CN 103412091B
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value
values
solution
reaction kettle
difference
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CN103412091A (en
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谭军
杜诚
王良波
陈全明
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Chongqing Endurance Industry Stock Co Ltd
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Chongqing Endurance Industry Stock Co Ltd
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Abstract

The embodiment of the invention discloses a kind of pH value measuring method, measure the pH value of three positions in reactor simultaneously, judge that whether the first pH value is unavailable by the difference of the first pH value and the second pH value and the 3rd pH value, when the first pH value is available, using the pH value of the mean value of three pH value as solution in reactor, when the first pH value is unavailable, using the pH value of the mean value of the second pH value and the 3rd pH value as solution in reactor.The pH value measuring method that the embodiment of the present application provides, when certain pH meter breaks down, can Timeliness coverage, and the pH value recorded by the pH meter broken down when calculating the pH value of solution in reactor is removed, the accuracy that the pH value that improve solution in reactor is measured, reduces in production run the error that the pH value of solution controls.Disclosed herein as well is a kind of pH value measurement mechanism.

Description

Method and device for measuring pH value
Technical Field
The invention relates to the technical field of measurement, in particular to a method and a device for measuring a pH value.
Background
In the production processes of medicine production, sewage treatment, preparation, petrochemical industry and the like, the pH value of a solution needs to be accurately controlled, and the key step of controlling the pH value of the solution is to obtain the pH value of the solution.
At present, the method for measuring the pH value of a solution is to install two pH meters on a reaction kettle (a container for performing a relevant reaction) to measure the solution in the reaction kettle, and to average the pH values measured by the two pH meters to obtain the pH value of the solution in the reaction kettle.
However, when a pH meter fails, the current pH value measuring method cannot find the failure in time, so that the pH value of the solution in the reaction kettle is not accurately measured, and the pH value control of the solution in the production process has large errors.
Disclosure of Invention
The invention aims to provide a pH value measuring method to solve the problem that when a pH meter fails, the pH value cannot be found in time, so that the pH value measurement is inaccurate.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of pH measurement comprising:
simultaneously obtaining the pH values of the solution at three positions in the reaction kettle;
judging whether a first pH value of the three pH values is unavailable;
when the first pH value is judged to be unavailable, determining the average value of a second pH value and a third pH value in the three pH values as the pH value of the solution in the reaction kettle; otherwise, determining the average value of the three pH values as the pH value of the solution in the reaction kettle;
wherein determining whether a first pH of the three pH values is unavailable comprises:
performing difference operation on the first pH value and a second pH value and a third pH value in the three pH values respectively to obtain a first difference value and a second difference value;
and when the absolute value of the first difference value and the absolute value of the second difference value are both larger than a first preset threshold value, judging that the first pH value is unavailable, otherwise, judging that the first pH value is available.
In the method, preferably, the first preset threshold is 1.5.
The above method, preferably, further comprises, after determining the average value of the second pH and the third pH as the pH of the solution in the reaction tank:
simultaneously obtaining the pH values of the solution at three positions in the reaction kettle;
judging whether the first pH value is available again;
when the first pH value is judged to be available again, determining the average value of the obtained three pH values as the pH value of the solution in the reaction kettle;
wherein determining whether the first pH is available for recovery comprises:
performing difference operation on the first pH value and a second pH value and a third pH value respectively to obtain a third difference value and a fourth difference value;
when the absolute value of the third difference and the absolute value of the fourth difference are both smaller than a second preset threshold, judging that the first pH value is available for restoration; otherwise, judging that the first pH value is not recovered to be usable.
In the method, preferably, the second preset threshold is 1.
The above method, preferably, further comprises:
acquiring pH value cutting information, wherein the pH value cutting information comprises an identification mark of a cut pH value;
and determining the average value of the uncut pH values as the pH value of the solution in the reaction kettle according to the pH value cutting information.
The above method, preferably, further comprises:
acquiring pH value loading information, wherein the pH value loading information comprises an identification mark of a pH value to be loaded;
a step of determining the average value of the obtained three pH values as the pH value of the solution in the reaction tank was performed.
A pH measuring device comprising:
three pH meters dispersedly arranged on the reaction kettle and used for measuring the pH values at three positions in the reaction kettle;
a controller connected to the three pH meters, the controller comprising:
the first acquisition unit is used for simultaneously acquiring the pH values of the solution at three positions in the reaction kettle;
a first judgment unit configured to judge whether a first pH value of the three pH values is unavailable, including: performing difference operation on the first pH value and a second pH value and a third pH value in the three pH values respectively to obtain a first difference value and a second difference value; when the absolute value of the first difference value and the absolute value of the second difference value are both larger than a first preset threshold value, judging that the first pH value is unavailable, otherwise, judging that the first pH value is available;
the first determining unit is used for determining the average value of the second pH value and the third pH value as the pH value of the solution in the reaction kettle when the first pH value is unavailable;
and the second determination unit is used for determining the average value of the three pH values as the pH value of the solution in the reaction kettle when the first pH value of the three pH values is available.
The above apparatus, preferably, the controller further includes:
the second judging unit is used for judging whether the first pH value is available again or not, and comprises the following steps: performing difference operation on the first pH value and a second pH value and a third pH value respectively to obtain a third difference value and a fourth difference value; when the absolute value of the third difference and the absolute value of the fourth difference are both smaller than a second preset threshold, judging that the first pH value is available for restoration; otherwise, judging that the first pH value is not recovered to be usable;
and the third determining unit is used for determining the average value of the three pH values as the pH value of the solution in the reaction kettle when the first pH value is available again.
The above apparatus, preferably, the controller further includes:
the second acquisition unit is used for acquiring pH value cutting information which comprises an identification mark of the cut pH value;
and the fourth determining unit is used for determining the average value of the uncut pH values as the pH value of the solution in the reaction kettle according to the pH value cutting information.
The above apparatus, preferably, the controller further includes:
a third obtaining unit, configured to obtain pH loading information, where the pH loading information includes an identification identifier of a pH to be loaded;
and the fifth determining unit is used for determining the average value of the three pH values as the pH value of the solution in the reaction kettle when the third acquiring unit acquires the pH value loading information.
According to the scheme, the pH values of the three positions in the reaction kettle are measured simultaneously, whether the first pH value is unavailable or not is judged through the difference value of the first pH value, the second pH value and the third pH value, when the first pH value is available, the average value of the three pH values is used as the pH value of the solution in the reaction kettle, and when the first pH value is unavailable, the average value of the second pH value and the third pH value is used as the pH value of the solution in the reaction kettle. That is to say, according to the pH value measurement method provided by the embodiment of the application, when a certain pH meter fails, the pH value can be found in time, and the pH value measured by the failed pH meter is removed when the pH value of the solution in the reaction kettle is calculated, so that the accuracy of measuring the pH value of the solution in the reaction kettle is improved, and the error of controlling the pH value of the solution in the production process is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a pH measurement method provided in an embodiment of the present application;
FIG. 2 is a flow chart of another method for pH measurement provided in the examples of the present application;
fig. 3 is a schematic structural diagram of a pH measurement apparatus according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of another pH measuring device provided in the embodiments of the present application;
FIG. 5 is a schematic structural diagram of another pH measuring device provided in the embodiments of the present application;
FIG. 6 is a schematic structural diagram of another pH measurement device provided in the embodiments of the present application;
FIG. 7 is a front view of a reaction vessel with a pH meter provided in an embodiment of the present disclosure mounted thereon;
FIG. 8 is a top view of the reactor vessel shown in FIG. 7 according to an embodiment of the present disclosure.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be practiced otherwise than as specifically illustrated.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a method for measuring pH according to an embodiment of the present application, including:
step S101: simultaneously obtaining the pH values of the solution at three positions in the reaction kettle;
the pH values of the solutions at the three positions can be measured by three pH meters dispersedly arranged on the reaction kettle, and preferably, the three pH meters can be uniformly distributed on the reaction kettle, for example, the included angle between any two pH meters is 120 °.
Step S102: determining whether a first pH of the three pH values is unavailable may include:
performing difference operation on the first pH value and a second pH value and a third pH value in the three pH values respectively to obtain a first difference value and a second difference value;
and when the absolute value of the first difference value and the absolute value of the second difference value are both larger than a first preset threshold value, judging that the first pH value is unavailable, otherwise, judging that the first pH value is available. Preferably, the first preset threshold may be 1.5, and certainly, the first preset threshold is not limited to 1.5, and may be appropriately adjusted according to actual requirements, for example, when the requirement for accuracy is higher, the first preset threshold may be decreased, and when the requirement for accuracy is lower, the first preset threshold may be increased.
The following illustrates the determination of whether a certain pH of three pH values is not available, and assuming that the three pH values are pH1, pH2, and pH3, respectively, then if | pH1-pH2| >1.5, and | pH1-pH3| >1.5, then pH1 is determined not to be available; similarly, if | pH2-pH1| >1.5 and | pH2-pH3| >1.5, then pH2 is judged to be unusable; if | pH3-pH1| >1.5 and | pH3-pH2| >1.5, then pH3 is judged to be unusable. Where, | · | represents an absolute value operation.
When the first pH value is judged to be unavailable, executing step S103, otherwise, executing step S104;
that is, when it is judged that one pH value is not available, step S103 is performed; when it is judged that all pH values are available, step S104 is performed.
Step S103: determining the average value of the second pH value and the third pH value as the pH value of the solution in the reaction kettle;
that is, when a certain pH value is judged to be unusable, the unusable pH value is removed, and only the usable pH value is used to determine the pH value of the solution in the reaction kettle.
Step S104: the average of the three pH values was determined as the pH value of the solution in the reaction tank.
According to the pH value measuring method provided by the embodiment of the application, the pH values of three positions in the reaction kettle are measured simultaneously, whether the first pH value is unavailable or not is judged through the difference value of the first pH value, the second pH value and the third pH value, when the first pH value is available, the average value of the three pH values is used as the pH value of the solution in the reaction kettle, and when the first pH value is unavailable, the average value of the second pH value and the third pH value is used as the pH value of the solution in the reaction kettle. That is to say, according to the pH value measurement method provided by the embodiment of the application, when a certain pH meter fails, the pH value can be found in time, and the pH value measured by the failed pH meter is removed when the pH value of the solution in the reaction kettle is calculated, so that the accuracy of measuring the pH value of the solution in the reaction kettle is improved, and the error of controlling the pH value of the solution in the production process is reduced.
Moreover, because the pH value measuring method provided by the embodiment of the application measures the pH values of three positions in the reaction kettle, when the pH value of one position is unavailable, the pH values of the other two positions can be used for determining the pH value of the solution in the reaction kettle, so that the problem that the pH value of the solution in the reaction kettle (especially a larger reaction kettle) cannot be well reflected when only one pH meter is in a working state due to the fact that 2 pH meters are used for measuring is avoided.
It should be noted that, in the embodiment of the present application, since the measurement of the pH is applied in the production process, the measurement of the pH is also performed periodically, that is, in the embodiment, the simultaneous obtaining of the pH of the solution at the three positions in the reaction kettle is performed periodically, and after the pH of the solution at the three positions in the reaction kettle is obtained each time, the pH of the solution in the reaction kettle is determined according to the above method.
Based on the embodiment shown in fig. 1, a flowchart of another pH measurement method provided in the embodiment of the present application is shown in fig. 2, and after determining that the first pH is not available and determining an average value of the second pH and the third pH as a pH of the solution in the reaction kettle, the method may further include:
step S201: simultaneously obtaining the pH values of the solution at three positions in the reaction kettle;
step S202: judging whether the first pH value is available again or not, comprising the following steps:
performing difference operation on the first pH value and a second pH value and a third pH value respectively to obtain a third difference value and a fourth difference value;
when the absolute value of the third difference and the absolute value of the fourth difference are both smaller than a second preset threshold, judging that the first pH value is available for restoration; otherwise, judging that the first pH value is not recovered to be usable. Preferably, the second preset threshold may be 1, and certainly, the first preset threshold is not limited to 1, and may be appropriately adjusted according to actual requirements, for example, when the requirement for accuracy is higher, the second preset threshold may be decreased, and when the requirement for accuracy is lower, the second preset threshold may be increased.
When the first pH value is judged to be available again, executing the step S104; otherwise, step S103 is executed.
The above embodiment, preferably, may further include:
acquiring pH value cutting information, wherein the pH value cutting information comprises an identification mark of a cut pH value;
because the pH meter needs to be calibrated on time, that is, calibration needs to be performed manually after running for a certain time, in the embodiment of the application, when a certain pH meter needs to be calibrated, the pH value removal information for removing a certain pH value can be manually input by a user, or the pH value removal information can be generated after the user triggers a corresponding button.
And determining the average value of the uncut pH values as the pH value of the solution in the reaction kettle according to the pH value cutting information.
After the pH value cutting information is obtained, it is indicated that the pH meter corresponding to the cut pH value needs to be calibrated, so that when the pH value of the solution in the reaction kettle is calculated, the cut pH value is not used, but the average value of the pH values which are not cut is used as the pH value of the solution in the reaction kettle.
The above embodiment, preferably, may further include:
acquiring pH value loading information, wherein the pH value loading information comprises an identification mark of a pH value to be loaded;
when the pH meter is put into operation again after calibration is completed, the information for loading the pH value, namely the pH value loading information, can be manually input by a user, or the user triggers a corresponding button to generate the pH value loading information;
a step of determining the average value of the obtained three pH values as the pH value of the solution in the reaction tank was performed.
After the pH value loading information is obtained, the loaded pH value is available, and at the moment, the loaded pH value is put into the pH value calculation process of the solution in the reaction kettle, namely, the average value of the three pH values is used as the pH value of the solution in the reaction kettle.
In the above embodiment, preferably, when it is determined that the pH meter is unavailable, an alarm may be given to prompt a worker to timely process the pH meter corresponding to the unavailable pH value.
Corresponding to the method embodiment, an embodiment of the present application further provides a pH value measuring device, a schematic structural diagram of which is shown in fig. 3, and the pH value measuring device may include:
three pH meters dispersedly installed on the reaction kettle, and the three pH meters are used for measuring pH values at three positions in the reaction kettle. Preferably, the three pH meters can be uniformly distributed on the reaction kettle, that is, the included angle between any two pH meters is 120 °.
A controller 301 connected to the pH meter, the controller 301 may include:
the first obtaining unit 3011 is configured to obtain pH values of solutions at three positions in the reaction kettle at the same time;
the first determining unit 3012, configured to determine whether a first pH value of the three pH values is unavailable, includes: performing difference operation on the first pH value and a second pH value and a third pH value in the three pH values respectively to obtain a first difference value and a second difference value; when the absolute value of the first difference value and the absolute value of the second difference value are both larger than a first preset threshold value, judging that the first pH value is unavailable, otherwise, judging that the first pH value is available;
a first determining unit 3013, configured to determine, when the first pH is unavailable, an average value of the second pH and the third pH as a pH of the solution in the reaction kettle;
a second determination unit 3014, configured to determine, when a first pH value of the three pH values is available, an average value of the three pH values as a pH value of the solution in the reaction kettle.
Based on the embodiment shown in fig. 3, a schematic structural diagram of another pH measuring apparatus provided in the embodiment of the present application is shown in fig. 4, where the controller 301 may further include:
the second determining unit 401, configured to determine whether the first pH value is available again, may include: performing difference operation on the first pH value and a second pH value and a third pH value respectively to obtain a third difference value and a fourth difference value; when the absolute value of the third difference and the absolute value of the fourth difference are both smaller than a second preset threshold, judging that the first pH value is available for restoration; otherwise, judging that the first pH value is not recovered to be usable;
a third determining unit 402, configured to determine an average value of the three pH values as the pH value of the solution in the reaction kettle when the first pH value is available again.
Based on the embodiment shown in fig. 3, a schematic structural diagram of another pH measuring apparatus provided in the embodiment of the present application is shown in fig. 5, where the controller 301 may further include:
a second obtaining unit 501, configured to obtain pH value excision information, where the pH value excision information includes an identification of an excised pH value;
a fourth determining unit 502, configured to determine an average value of uncut pH values as a pH value of the solution in the reaction kettle according to the pH value cutting information.
Based on the embodiment shown in fig. 5, a schematic structural diagram of another pH measuring device provided in the embodiment of the present application is shown in fig. 6, where the controller 301 may further include:
a third obtaining unit 601, configured to obtain pH loading information, where the pH loading information includes an identification identifier of a pH to be loaded;
a fifth determining unit 602, configured to determine, when the third obtaining unit obtains the pH loading information, an average value of the three pH values as a pH value of the solution in the reaction kettle.
It should be noted that, in this embodiment of the application, the first obtaining unit 3011 and the second obtaining unit 501 may be integrated into one functional module, that is, the functions of the first obtaining unit 3011 and the second obtaining unit 501 may be implemented by one functional module;
the first determining unit 3012 and the second determining unit 401 may also be integrated into a single functional module, that is, the functions of the first determining unit 3012 and the second determining unit 401 may also be implemented by a single functional module;
similarly, the first determining unit 3013, the second determining unit 3014, the third determining unit 402, the fourth determining unit 502, and the fifth determining unit 602 may also be integrated into one work function module.
In the above embodiment, the installation positions of the three pH meters on the reaction kettle can be seen in fig. 7 and 8; FIG. 7 is a front view of a reaction vessel with a pH meter provided in an embodiment of the present disclosure mounted thereon; FIG. 8 is a top view of the reactor vessel shown in FIG. 7 as provided in an embodiment of the present application; of course, fig. 7 and 8 only show one installation way of the pH meters, and other installation ways are also possible, for example, the three pH meters are uniformly distributed in the same plane, that is, the included angle between the three pH meters is 120 °, of course, the three pH meters can also be non-uniformly distributed in the same plane, and similarly, the three pH meters can also not be in the same plane.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A method of pH measurement, comprising:
simultaneously obtaining the pH values of the solution at three positions in the reaction kettle;
judging whether a first pH value of the three pH values is unavailable;
when the first pH value is judged to be unavailable, determining the average value of a second pH value and a third pH value in the three pH values as the pH value of the solution in the reaction kettle; otherwise, determining the average value of the three pH values as the pH value of the solution in the reaction kettle;
wherein determining whether a first pH of the three pH values is unavailable comprises:
performing difference operation on the first pH value and a second pH value and a third pH value in the three pH values respectively to obtain a first difference value and a second difference value;
when the absolute value of the first difference value and the absolute value of the second difference value are both larger than a first preset threshold value, judging that the first pH value is unavailable, otherwise, judging that the first pH value is available;
the method further comprises the following steps:
acquiring pH value cutting information, wherein the pH value cutting information comprises an identification mark of a cut pH value; determining the average value of uncut pH values as the pH value of the solution in the reaction kettle according to the pH value cutting information;
acquiring pH value loading information, wherein the pH value loading information comprises an identification mark of a pH value to be loaded; determining the average value of the obtained three pH values as the pH value of the solution in the reaction kettle;
wherein,
the process of acquiring the pH value excision information comprises the following steps: when a certain pH meter needs to be calibrated, the pH value cutting information for cutting off a certain pH value can be manually input by a user, or the pH value cutting information is generated after the user triggers a corresponding button;
the process of acquiring the pH value loading information comprises the following steps: when the pH meter is put into operation again after calibration is completed, the pH value loading information can be manually input by a user, or the user triggers a corresponding button to generate the pH value loading information.
2. The method of claim 1, wherein the first predetermined threshold is 1.5.
3. The method of claim 1, further comprising, after determining the average of the second pH and the third pH as the pH of the solution in the reaction tank:
simultaneously obtaining the pH values of the solution at three positions in the reaction kettle;
judging whether the first pH value is available again;
when the first pH value is judged to be available again, determining the average value of the obtained three pH values as the pH value of the solution in the reaction kettle;
wherein determining whether the first pH is available for recovery comprises:
performing difference operation on the first pH value and a second pH value and a third pH value respectively to obtain a third difference value and a fourth difference value;
when the absolute value of the third difference and the absolute value of the fourth difference are both smaller than a second preset threshold, judging that the first pH value is available for restoration; otherwise, judging that the first pH value is not recovered to be usable.
4. The method according to claim 3, wherein the second preset threshold is 1.
5. A pH measuring device, comprising:
three pH meters dispersedly arranged on the reaction kettle and used for measuring the pH values at three positions in the reaction kettle;
a controller connected to the three pH meters, the controller comprising:
the first acquisition unit is used for simultaneously acquiring the pH values of the solution at three positions in the reaction kettle;
a first judgment unit configured to judge whether a first pH value of the three pH values is unavailable, including: performing difference operation on the first pH value and a second pH value and a third pH value in the three pH values respectively to obtain a first difference value and a second difference value; when the absolute value of the first difference value and the absolute value of the second difference value are both larger than a first preset threshold value, judging that the first pH value is unavailable, otherwise, judging that the first pH value is available;
the first determining unit is used for determining the average value of the second pH value and the third pH value as the pH value of the solution in the reaction kettle when the first pH value is unavailable;
a second determination unit, configured to determine, when a first pH value of the three pH values is available, an average value of the three pH values as a pH value of the solution in the reaction kettle;
the controller further includes:
the second acquisition unit is used for acquiring pH value cutting information which comprises an identification mark of the cut pH value;
a fourth determining unit, configured to determine, according to the pH value cutting information, an average value of uncut pH values as a pH value of the solution in the reaction kettle;
a third obtaining unit, configured to obtain pH loading information, where the pH loading information includes an identification identifier of a pH to be loaded;
a fifth determining unit, configured to determine an average value of the three pH values as a pH value of the solution in the reaction kettle when the third obtaining unit obtains the pH value loading information;
wherein,
the process of acquiring the pH value excision information comprises the following steps: when a certain pH meter needs to be calibrated, the pH value cutting information for cutting off a certain pH value can be manually input by a user, or the pH value cutting information is generated after the user triggers a corresponding button;
the process of acquiring the pH value loading information comprises the following steps: when the pH meter is put into operation again after calibration is completed, the pH value loading information can be manually input by a user, or the user triggers a corresponding button to generate the pH value loading information.
6. The apparatus of claim 5, wherein the controller further comprises:
the second judging unit is used for judging whether the first pH value is available again or not, and comprises the following steps: performing difference operation on the first pH value and a second pH value and a third pH value respectively to obtain a third difference value and a fourth difference value; when the absolute value of the third difference and the absolute value of the fourth difference are both smaller than a second preset threshold, judging that the first pH value is available for restoration; otherwise, judging that the first pH value is not recovered to be usable;
and the third determining unit is used for determining the average value of the three pH values as the pH value of the solution in the reaction kettle when the first pH value is available again.
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