Method for adjusting boost timing automatically, and sample processor
The automatic boost timing adjustment method for sample processors addresses aging-related inaccuracies by calculating and fine-tuning pump speeds, improving efficiency and reliability in sample delivery.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BECKMAN COULTER BIOTECHNOLOGY (SUZHOU) CO LTD
- Filing Date
- 2025-12-10
- Publication Date
- 2026-06-18
AI Technical Summary
Existing sample processors face issues with inaccurate boost timing due to pump and pipeline aging, leading to sample wastage and inaccurate analysis results, requiring time-consuming and labor-intensive manual adjustments by engineers.
An automatic method for adjusting boost timing by operating the pump at different speeds, calculating and fine-tuning the boost timing based on event rates, and setting completion criteria to ensure accurate sample delivery to the flow cell.
Automatically adjusts boost timing, reducing labor and time costs, enhancing efficiency and reliability without relying on engineer experience, and ensuring precise sample delivery.
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Figure CN2025141457_18062026_PF_FP_ABST
Abstract
Description
METHOD FOR ADJUSTING BOOST TIMING AUTOMATICALLY, AND SAMPLE PROCESSORCROSS-REFERECE TO RELATED PATENT APPLICATION
[0001] The present application claims the benefit of and priority to CN Application No. 202411807265.2 filed December 10, 2024, the entire disclosure of which is incorporated herein by reference.FIELD
[0002] The present application relates to medical equipment, and more particularly to a method for automatically adjusting boost timing of a sample processor such as a flow cytometric sorter / analyzer, and a sample processor.BACKGROUND
[0003] This section only provides background information related to the present disclosure, which is not necessarily the conventional technology.
[0004] A sample processor (e.g., a flow cytometer) is commonly used to analyze sample fluid including particles (e.g., biological particles, abiotic particles) or cells and / or to sort the particles or cells in the sample fluid. In a sample processor, a pump is configured to pump the sample through a sampling pipeline designed to transport the sample fluid to a flow cell. The sample fluid containing particles or cells passes through the detection area of the sample processor and is then discharged after detection.
[0005] The detection system of the sample processor begins collecting sample information once the sample reaches the flow cell. The process of delivering the sample to the flow cell is referred to as sample boosting. To enable the sample to reach the flow cell quickly and reduce detection time, before detection begins, the pump of the sample processor first operates at a relatively high speed for a period of time, and then subsequently operates at a lower speed to acquire the sample in the flow cell. When the detection system of the sample processor detects a stable sample flow at the flow cell (e.g., when the detected signal reaches 90 events per second) , it is considered that the sample has continuously and stably reached the flow cell. To minimize the waiting time before detection, it is desirable that the sample exactly reaches the flow cell while the pump is operated at the higher speed, so that sampling can commence without any additional waiting time after the speed of the pump is reduced. The operation of the pump at a higher speed before sampling begins is called rapid sample boosting, and the duration of this high-speed operation is referred to as the boost timing. Sample processors are factory-set with a boost timing based on initial calibration.
[0006] From the above, it can be seen that the boost timing is an important parameter for sample processors. Incorrect boost timing can lead to sample wastage and affect analysis results, such as impacting the collection and calculation of collection volume, concentration, absolute event count, events per second, or the like. This is because the sample processor begins sampling after the boost timing has elapsed. If the fluid is not delivered to the flow cell as a stable sample flow within the preset boost timing, the detection work will be based on an insufficient quantity of samples, leading to inaccurate results.
[0007] The reason why the initially set boost timing is no longer accurate is as follows: over time, the pump and the sampling pipeline age, resulting in a tolerance between the actual boost timing of the sample processor and the initially set boost timing, which affects sampling results. For example, a common issue is that after sample boosting based on the initially set boost timing upon installation, the sample fluid does not reach the flow cell, causing subsequent collection and calculation tolerance.
[0008] To eliminate such tolerance, it is necessary to reset new boost timing for the sample processor. In the conventional technology, resetting the boost timing often involves a service engineer visiting the site for debugging. This approach is not only time-consuming and labor-intensive, with relatively high costs, but also the debugging results are highly dependent on the experience of the service engineer.SUMMARY
[0009] This section provides a general summary of the present disclosure, rather than a comprehensive disclosure of the full scope of the present disclosure or all features of the present disclosure.
[0010] In view of the aforementioned issues with existing methods for adjusting boost timing, an object of the present disclosure is to provide an improved method for adjusting boost timing that enables automatic adjustment of the boost timing, thereby reducing the costs associated with the adjustment process.
[0011] According to an aspect of the present disclosure, a method for adjusting boost timing automatically is provided, which is used for adjusting the boost timing of a sample processor. The boost timing refers to a duration required for a sample to stably reach a flow cell from a sample source through a sampling pipeline under an action of a pump. The method includes following steps: operating the pump at a first speed without boost and acquiring the sample; obtaining a first duration required for event rate to reach a specified value; calculating the boost timing when the pump operates at a second speed with boost based on the first speed and the first duration; operating the pump at the second speed with boost for the calculated boost timing, and then operating the pump at the first speed to acquire the sample; obtaining a second duration that the pump has been running at the first speed in Step 4 when the event rate reaches the specified value; and judging whether the calculated boost timing is acceptable, and if the calculated boost timing is acceptable, setting the calculated boost timing as the adjusted boost timing.
[0012] In some embodiments according to the present disclosure, the method further includes a step of setting a completion criterion for adjusting the boost timing. The completion criterion is that the second duration is less than a set tolerance or number of times of adjusting cycles reaches an upper limit.
[0013] In some embodiments according to the present disclosure, in the step of judging whether the calculated boost timing is acceptable, judging whether the second duration is less than the set tolerance, and if it is less than the tolerance, the calculated boost timing is acceptable, while if it is greater than or equal to the tolerance, the calculated boost timing is unacceptable.
[0014] In some embodiments according to the present disclosure, the method further includes: judging whether the number of times of adjusting cycles reaches the upper limit when it is determined that the calculated boost timing is unacceptable; and if the number of times of adjusting cycles does not reach the upper limit, fine-tuning the calculated boost timing, repeating the step 4, step 5 and step 6 and increasing the number of times of adjusting cycles by 1.
[0015] In some embodiments according to the present disclosure, the method further includes reporting an error and terminating the adjustment steps when it is determined that the number of times of adjusting cycles reaches the upper limit.
[0016] In some embodiments according to the present disclosure, in the step of calculating the boost timing when the pump operates at the second speed with boost based on the first speed and the first duration, the boost timing Tb= (Ss×Ds) / Sb, where Ss is the first speed, Ds is the first duration and Sb is the second speed.
[0017] In some embodiments according to the present disclosure, in the step of fine-tuning the calculated boost timing, the fine-tuned boost timing Tb2=Tb+ (Dbt ×Ss) / Sb, where Tb is the calculated boost timing, Dbt is the second duration, Ss is the first speed, and Sb is the second speed.
[0018] In some embodiments according to the present disclosure, the method further includes a step of flushing the sampling pipeline before step 1 and step 4, respectively.
[0019] According to another aspect of the present disclosure, a sample processor is provided, including a sampling pipeline system for supplying sample to a flow cell of the sample processor and a control device for controlling operation of the sampling pipeline system. The sampling pipeline system includes a sample source, a pump and a sampling pipeline. The control device includes a storage unit and a calculation unit. The pump is configured to be able to operate at a first speed without boost and at a second speed with boost to pump the sample from the sample source to the flow cell through the sampling pipeline. The storage unit is configured to store the first speed and the second speed of the pump. The calculation unit is configured to calculate a first duration required for event rate to reach a specified value when the pump operates at the first speed and the boost timing when the pump operates at the second speed with boost based on the first speed and the first duration. The calculation unit is further configured to judge whether the calculated boost timing is acceptable, and if the calculated boost timing is acceptable, the calculated boost timing is set as the adjusted boost timing and stored in the storage unit.
[0020] In some embodiments according to the present disclosure, the calculation unit is further configured to calculate a second duration which is the duration required for the pump to run at the first speed after a period of the calculated boost timing is run at the second speed so that the event rate reaches a specified value, and where the control device further includes an input unit, through which a user is able to set a tolerance that the second duration should be less than.
[0021] In some embodiments according to the present disclosure, the sampling pipeline system further includes a cleaning pipeline configured to flush the sampling pipeline before the pump operates at the first speed and before the pump operates at the second speed, respectively.
[0022] The method for adjusting boost timing automatically and the sample processor according to the present disclosure can realize at least the following advantageous effects.
[0023] The method for adjusting boost timing automatically and the sample processor according to the present disclosure are capable of automatically adjusting the boost timing, saving both labor and time costs required for the adjustment, improving efficiency. Moreover, the adjustment results do not rely on the experience of engineers, enhancing the reliability of the adjustment.
[0024] The above and other objects, features and advantages of the present disclosure will be more fully understood from the detailed description given below and the accompanying drawings, which are given by way of illustration only and are therefore not considered as limiting the present disclosure.BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Features and advantages of one or several embodiments of the present disclosure will become more easily understood from the following description with reference to the accompanying drawings, in which:
[0026] FIG. 1 is a schematic view of a sampling pipeline system of a sample processor according to an embodiment of the present disclosure;
[0027] FIG. 2 is a flowchart of a method for adjusting boost timing automatically according to an embodiment of the present disclosure; and
[0028] FIG. 3 is a functional block view of a control device of a sample processor according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0029] The present disclosure will now be described in detail below through exemplary embodiments with reference to the accompanying drawings. In several accompanying drawings, similar components and assemblies are represented by similar reference numerals. The following detailed description of the present disclosure is for illustrative purposes only and is in no way a limitation of the present disclosure, its application or usages. The embodiments described in this specification are not exhaustive and are merely some of multiple possible embodiments. The exemplary embodiments may be implemented in many different forms, and should not be construed as limiting the scope of the present disclosure. In some exemplary embodiments, well-known processes, well-known device structures, and well-known technologies may not be described in detail.
[0030] FIG. 1 shows a sampling pipeline system 10 of a sample processor. The sampling pipeline system 10 is configured to supply a sample to a flow cell FC of the sample processor.
[0031] As shown in FIG. 1, the sampling pipeline system 10 includes a pump 11, a sampling pipeline 12, a switching device 13, and a cleaning pipeline 14.
[0032] The sampling pipeline 12 connects a sample source 1 containing the sample to the flow cell FC. The sample source 1 may be, for example, a container, a bottle, or a reagent kit containing the sample. The sample contains small suspended particles that are to be detected or sorted in the flow cell FC.
[0033] The pump 11 is positioned in the sampling pipeline 12 and is used to pump the sample from the sample source 1 through the sampling pipeline 12 to the flow cell FC, so as to process (for example, detect or sort) the particles of the sample in the flow cell FC. The pump 11 is configured to be able to operate in at least two speed modes: a high-speed mode for sample boosting and a low-speed mode for normal operation. Additionally, the pump 11 may operate at multiple speeds exceeding two.
[0034] In this embodiment, the pump 11 may be, for example, a peristaltic pump, a pressure pump, or a piston pump.
[0035] The cleaning pipeline 14 connects a cleaning fluid source 2 to the pump 11. The cleaning fluid source 2 may be, for example, a container, a tank, or a barrel containing the cleaning fluid. The term "cleaning fluid"as used herein refers to a solution or solvent used to flush the sample. The cleaning fluid may be selected or changed based on the sample.
[0036] The switching device 13 is configured to control interruption or communication of the cleaning liquid pipeline 14 and interruption or communication of the sampling pipeline 12. The supply of different fluids is controlled through controlling the interruption or communication of the cleaning liquid pipeline 14 and the interruption or communication of the sampling pipeline 12. When the sampling pipeline 12 is communicated and the cleaning pipeline 14 is interrupted, fluid is allowed to flow between the sample source 1 and the flow cell FC via the sampling pipeline 12, while preventing the cleaning fluid from flowing through the cleaning pipeline 14. When the cleaning pipeline 14 is communicated and the sampling pipeline 12 is interrupted, the cleaning fluid is allowed to be supplied to the pump 11, while preventing the fluid flowing from the sample source 1 to the flow cell FC or from the flow cell FC to the sample source 1. In other words, the switching device 13 is configured to control one of the cleaning pipeline 14 and the sampling pipeline 12 to be communicated, and control the other of the cleaning pipeline 14 and the sampling pipeline 12 to be interrupted. The basic structural form and working principle of the sampling pipeline system 10 of the sample processor are well-known in the art and are therefore not described in detail herein.
[0037] Before sampling begins in the sample processor, the switching device 13 enables the sampling pipeline 12 to be communicated and the cleaning pipeline 14 to be interrupted. The pump 11 initially pumps the sample from the sample source 1 to the flow cell FC at its maximum speed to achieve rapid sample boosting. Subsequently, the speed of the pump 11 decreases to a stable operating speed to continuously and steadily supply the sample to the flow cell FC. Ideally, when the speed of the pump 11 decreases to the stable operating speed, the detection system (not shown) of the sample processor can detect a stable sample flow (for example, a detected signal reaching 90 events per second) , indicating that the sample has reached the flow cell FC. A duration during which the pump 11 operates at its maximum speed is the boost timing, which is recorded in the sample processor as an operational parameter.
[0038] After the sample processor has been used for a period of time, aging of the pump 11 and / or the sampling pipeline 12 may cause a tolerance between the actual boost timing and the initially set boost timing of the sample processor. Generally, the required actual boost timing tends to become longer. That is, after the pump 11 operates at its maximum speed for the boost timing, the sample has not yet reached the flow cell FC, resulting in the detection system being unable to detect a stable sample flow in the flow cell FC after detection begins. Therefore, it is necessary to adjust the set boost timing of the sample processor to align it with the required actual boost timing.
[0039] Below, the method for adjusting boost timing automatically according to an embodiment of the present disclosure will be described with reference to FIG. 2. FIG. 2 is a flowchart of the method for automatically adjusting boost timing of a sample processor according to an embodiment of the present disclosure.
[0040] As shown in FIG. 2, the method includes the step of preparing a sample required for adjusting the boost timing (Step S11) . This sample may be a dedicated sample containing particles or cells suitable for detection by the sample processor, which is different from the samples actually processed during the operation of the sample processor.
[0041] The method further includes the step of setting the completion criterion for adjusting the boost timing (Step S12) .
[0042] Since a distance traveled by the sample from the sample source through the sampling pipeline 12 to the flow cell FC is constant, and a distance traveled by the sample is a product of the speed of the pump 11 that pumps the sample and the duration required for the sample to travel from the sample source 1 to the flow cell FC. The adjustment method according to the present disclosure is based on the above theory. That is, the theoretical boost timing is first calculated based on this theory. However, due to the fact that the sample fluid in the sampling pipeline may not necessarily be a stable laminar flow, there may be a certain tolerance between the theoretical boost timing obtained by the adjustment method of this embodiment and the actual boost timing. Users can set an acceptable tolerance as needed, for example, less than 0.1 seconds. When the user sets a completion criterion as a tolerance of, for example, less than 0.1 seconds, it means that if the pump 11 operates at its maximum speed for the boost timing and then decreases to a stable operating speed, and the detection system can detect a stable sample flow within less than 0.1 seconds, the adjustment is considered complete. The theoretical boost timing obtained by the adjustment method of this embodiment will be stored as the new boost timing in the system of the sample processor.
[0043] Furthermore, the method includes the step of flushing the sampling pipeline 12 (Step S13) to clean away any residues and impurities in the sampling pipeline 12 and the pump 11, so as to avoid affecting the adjustment results. The flushing step is performed through the cleaning pipeline 14 and the cleaning fluid. The flushing method is well-known in the art and is therefore not described in detail herein.
[0044] After the flushing is completed, the pump 11 is operated without boost (i.e., at a conventional lower speed, such as 200 rpm) to deliver the sample prepared in Step S11 to the flow cell FC (Step S14) . The system of the sample processor records the first speed Ss of the pump 11 at this time.
[0045] When the detection device of the sample processor detects that the event rate reaches a specified value, i.e., the signals detected in the sample by the detection device reach a set value (for example, 90 signals detected per second) , it indicates that the sample has reached the flow cell FC and a stable sample flow exists in the flow cell FC. The system records the first duration Ds from when the pump 11 starts operating to this point (Step S15) .
[0046] The slower the speed of the pump 11, the more stable the flow of the sample fluid in the sampling pipeline, resulting in a higher accuracy of the calculated distance traveled by the sample based on the first duration and the first speed of the pump. Therefore, in the method for adjusting the boost timing according to this embodiment, the pump is operated at a lower speed in Step S14.
[0047] As mentioned above, the distance traveled by the sample is the product of the speed of the pump 11 that pumps the sample and the duration required for the sample to travel from the sample source 1 to the flow cell FC. This distance remains constant regardless of whether the pump operates at a high speed or a low speed. Therefore, based on the first speed Ss of the pump 11 obtained in Step S14 and the first duration Ds obtained in Step S15, the theoretical boost timing when the pump 11 operates with boost (i.e., at a higher second speed) can be calculated (Step S16) : Tb= (Ss×Ds) / Sb.
[0048] wherein,
[0049] Sb represents the second speed of the pump 11 when operating with boost.
[0050] As mentioned above, since the distance traveled by the sample from the sample source through the sampling pipeline 12 to the flow cell FC is constant, and this distance is the product of the speed of the pump 11 that pumps the sample and the duration required for the sample to travel from the sample source 1 to the flow cell FC. Therefore, the boost timing when the pump operates with boost can be calculated by the above equation.
[0051] Subsequently, the step of flushing the sampling pipeline is performed again (Step S17) to clean away the sample fluid that entered the sampling pipeline 12 and the pump 11 in Step S14, so as to avoid affecting subsequent adjustment results. The manner of flushing is the same as that in Step S13 and will not be repeated here.
[0052] After the flushing is completed, the pump 11 is set to operate at the second speed (for example, 5000 rpm) with boost for the calculated boost timing, and then the pump is operated at the first speed to obtain the sample (Step S18) .
[0053] When the detection device of the sample processor detects that the event rate reaches a specified value, i.e., the signals detected in the sample reach a set value (for example, 90 signals detected per second) , it indicates that the sample has reached the flow cell FC and a stable sample flow exists in the flow cell FC. The second duration Dbt from when the pump 11 starts operating at the first speed to this point is recorded (Step S19) .
[0054] It is determined whether the calculated theoretical boost timing is within an acceptable range (Step S21) , that is, whether the second duration Dbt is within the set tolerance, for example, whether Dbt is less than 0.1 seconds.
[0055] If the second duration Dbt is within the set tolerance (for example, less than 0.1 seconds) , the adjustment is complete, and the calculated theoretical boost timing Tb is stored in the system as the new boost timing.
[0056] If the second time Dbt is not within the set tolerance (for example, equal to or greater than 0.1 seconds) , the calculated theoretical boost timing is fine-tuned (Step S23) to obtain a new theoretical boost timing: Tb2=Tb+ (Dbt ×Ss) / Sb
[0057] wherein,
[0058] Tb2 is the new theoretically adjusted boost timing after fine-tuning;
[0059] Dbt is the second duration;
[0060] Ss is the first speed; and
[0061] Sb is the second speed.
[0062] Subsequently, starting from Step S17, the above steps are re-executed, that is: flushing the sampling pipeline again (Step S17) ; after the flushing is completed, setting the pump 11 to operate at the second speed with boost for the fine-tuned boost timing, and then operate at the first speed to obtain the sample in the flow cell FC (Step S18) ; obtaining the second duration that the pump has been operating at the first speed as the event rate reaches the specified value (Step S19) ; determining whether the calculated theoretical boost timing (now the adjusted new theoretical boost timing after fine-tuning) is acceptable (Step S21) , until an appropriate boost timing is obtained, that is, when it is determined in Step S21 that the calculated theoretical boost timing is acceptable, the adjustment is complete, and the theoretical boost timing used in the last run is stored in the system as the new boost timing.
[0063] In a preferred embodiment of the present disclosure, the above method for automatically adjusting the boost timing further includes the step of determining whether the number of times of adjusting cycles has reached an upper limit (Step S22) . In this case, the step of setting the completion criterion for adjusting the boost timing (Step S12) further includes setting an upper limit for the number of times of adjusting cycles (for example, 3 times) .
[0064] Specifically, when it is determined in Step S21 that the calculated theoretical boost timing is not acceptable, the system determines the number of times the adjustment method has been run. When the number of times of adjusting cycles has not reached the set upper limit (for example, 3 times) , the calculated theoretical boost timing is fine-tuned again (Step S23) and the next cycle is initiated, while the number of times of adjusting cycles is incremented by 1. When the number of times of adjusting cycles reaches the set upper limit, an error message is output, for example, in the form of a pop-up dialog box on the user interface or an alarm sound, to remind the user that there may be a problem with the operation of the adjustment method, so that the user can perform subsequent inspections, and the adjustment steps are terminated.
[0065] The method for automatically adjusting the boost timing according to the embodiment of the present disclosure enables the existing sample processor to automatically run the above adjustment steps, saving the labor and time costs required for adjusting the boost timing, improving efficiency, and the adjustment result does not rely on the experience of engineers, enhancing the reliability of the adjustment.
[0066] It should be understood that the method for adjusting the boost timing automatically according to the present disclosure should not be limited to the specific examples shown in the accompanying drawings or described herein, but can be changed as needed. The steps of the method are not necessarily performed in the order described, but may be adjusted as needed.
[0067] The present disclosure further relates to a sample processor. The sample processor includes the above sampling pipeline system 10 and a control device 40, and the sample processor can use the above automatic adjustment method to adjust the boost timing.
[0068] Below, the control device 40 of the sample processor will be described with reference to FIG. 3. FIG. 3 is a functional block view of the control device 40. As shown in FIG. 3, the control device includes an input unit 41, a storage unit 42, a calculation unit 43, and an output unit 44. The control device 40 is configured to: receive user input instructions through the input unit 41, such as setting completion criterion and setting the maximum number of times of adjusting cycle; store operational data through the storage unit 42, such as the first and second speeds of the pump; calculate the boost timing and fine-tune the boost timing through the calculation unit 43; and output the operational results through the output unit 44.
[0069] Although the present disclosure has been described with reference to exemplary embodiments, it should be understood that the present disclosure is not limited to the specific embodiments described and illustrated herein. Those skilled in the art may make various changes to the exemplary embodiments without departing from the scope defined by the claims. The features in the various embodiments may be combined with each other, provided that there is no contradiction. Alternatively, a certain feature in an embodiment may be omitted.
Claims
1.A method for adjusting boost timing automatically, which is used for adjusting the boost timing of a sample processor, wherein the boost timing refers to a duration required for a sample to stably reach a flow cell from a sample source through a sampling pipeline under an action of a pump;wherein the method comprises the following steps:Step 1: operating the pump at a first speed without boost and acquiring the sample;Step 2: obtaining a first duration required for event rate to reach a specified value;Step 3: calculating the boost timing when the pump operates at a second speed with boost based on the first speed and the first duration;Step 4: operating the pump at the second speed with boost for the calculated boost timing, and then operating the pump at the first speed to acquire the sample;Step 5: obtaining a second duration that the pump has been running at the first speed in Step 4 when the event rate reaches the specified value; andStep 6: judging whether the calculated boost timing is acceptable, wherein if the calculated boost timing is acceptable, setting the calculated boost timing as the adjusted boost timing.2.The method according to claim 1, further comprising a step of setting a completion criterion for adjusting the boost timing;wherein the completion criterion is that the second duration is less than a set tolerance or number of times of adjusting cycles reaches an upper limit.3.The method according to claim 2, wherein in the step of judging whether the calculated boost timing is acceptable, judging whether the second duration is less than the set tolerance, and if it is less than the tolerance, the calculated boost timing is acceptable, while if it is greater than or equal to the tolerance, the calculated boost timing is unacceptable.4.The method according to any one of claims 2 to 3, further comprising:judging whether the number of times of adjusting cycles reaches the upper limit when it is determined that the calculated boost timing is unacceptable; andif the number of times of adjusting cycles does not reach the upper limit, fine-tuning the calculated boost timing, repeating the step 4, step 5 and step 6 and increasing the number of times of adjusting cycles by 1.5.The method according to claim 4, further comprising:reporting an error and terminating the adjustment steps when it is determined that the number of times of adjusting cycles reaches the upper limit.6.The method according to claim 4, wherein in the step of calculating the boost timing when the pump operates at the second speed with boost based on the first speed and the first duration, the boost timing Tb= (Ss×Ds) / Sb, wherein Ss is the first speed, Ds is the first duration and Sb is the second speed.7.The method according to claim 6, wherein in the step of fine-tuning the calculated boost timing, the fine-tuned boost timing Tb2=Tb+ (Dbt ×Ss) / Sb, wherein Tb is the calculated boost timing, Dbt is the second duration, Ss is the first speed, and Sb is the second speed.8.The method according to any one of claims 1 to 3 and 5 to 7, further comprising a step of flushing the sampling pipeline before step 1 and step 4, respectively.9.A sample processor, comprising a sampling pipeline system (10) for supplying sample to a flow cell (FC) of the sample processor and a control device (40) for controlling operation of the sampling pipeline system (10) , whereinthe sampling pipeline system (10) comprises a sample source (1) , a pump (11) and a sampling pipeline (12) ,the control device (40) comprises a storage unit (42) and a calculation unit (43) ,wherein the pump (11) is configured to be able to operate at a first speed without boost and at a second speed with boost to pump the sample from the sample source (1) to the flow cell (FC) through the sampling pipeline (12) ;the storage unit (42) is configured to store the first speed and the second speed of the pump (11) ;the calculation unit (43) is configured to calculate a first duration required for event rate to reach a specified value when the pump (11) operates at the first speed and the boost timing when the pump (11) operates at the second speed with boost based on the first speed and the first duration; andthe calculation unit (43) is further configured to judge whether the calculated boost timing is acceptable, wherein if the calculated boost timing is acceptable, the calculated boost timing is set as the adjusted boost timing and stored in the storage unit.10.The sample processor according to claim 9, wherein the calculation unit (43) is further configured to calculate a second duration which is the duration required for the pump (11) to run at the first speed after a period of the calculated boost timing is run at the second speed so that the event rate reaches a specified value, and wherein the control device (40) further comprises an input unit (41) , through which a user is able to set a tolerance that the second duration should be less than.11.The sample processor according to claim 9, wherein the sampling pipeline system (10) further comprises a cleaning pipeline (14) configured to flush the sampling pipeline (12) before the pump (11) operates at the first speed and before the pump (11) operates at the second speed, respectively.