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Correct method and device for calibrating discharge capacity of suction pipe

A calibration method and technology for discharging capacity, applied in the field of pipettes, can solve the problems of difficulty in ensuring accuracy and reliability, difficulty in discharging capacity, etc., and achieve the effect of simple calibration and simple calibration method

Inactive Publication Date: 2018-04-20
A&D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a field, since the conditions are different between when the suction pipe is calibrated with distilled water and when it is used, it is difficult to discharge the correct volume, and of course it is also difficult to ensure accuracy and reliability.

Method used

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  • Correct method and device for calibrating discharge capacity of suction pipe
  • Correct method and device for calibrating discharge capacity of suction pipe
  • Correct method and device for calibrating discharge capacity of suction pipe

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Experimental program
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Embodiment Construction

[0027] Next, preferred embodiments of the present invention will be described with reference to the drawings. figure 1 is a front view showing an electric pipette according to an embodiment of the present invention, figure 2 is the right side view of the electric pipette.

[0028]Reference numeral 100 is an electric pipette, which is a micro pipette operated by hand with a total length of about 280 mm. Reference numeral 1 is a cylindrical main body case 1 that is long in the vertical direction, and inside the case enclosed by fitting the front case and the rear case, there is provided an elongated cylindrical body 2 for suction and discharge of liquid. Piston 3 inserted into cylinder body 2 so as to reciprocate up and down, ball screw 5 connected to piston 3 to move piston 3 up and down, and ball screw 5 to rotate in both forward and reverse directions Driven stepper motor 6.

[0029] Reference numeral 7 is a suction head holding part, which is a part of the main body case...

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PUM

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Abstract

To provide a simple method and device for correcting the discharge volume of a suction pipe capable of ensuring a correct discharge volume under any metering conditions. Through the following steps, the actual discharge volume becomes the set volume: step (S1), set the set volume with the actual metering pipette; step (S2), suck the liquid to be metered to the metering tip ; Step (S3), discharge the liquid sucked into the suction head to a mass meter capable of measuring weight; Step (S4~S6), determine the actual amount discharged from the suction pipe; Step (S7~S9), obtain The ratio of the set amount to the actual amount is corrected to attract the amount that is the product of the ratio and the set amount.

Description

technical field [0001] The present invention relates to a liquid suction tube as a metering device for sucking and discharging a liquid of a set capacity, and more particularly to a method for accurately correcting the discharge capacity of a liquid suction tube and a liquid suction tube device used therefor. Background technique [0002] A metering device called a suction pipe that has a constant-volume discharge function for liquids grasps the change in volume caused by the movement of the movable piston installed inside the pipette as a change in the volume of air, and calculates the volume change of the air The volume of liquid is sucked and discharged to the suction head installed on the front end of the suction pipe. In principle, since compressible air is used as the medium, it is subjected to air resistance in the air circuit, or to the physical properties of the piston operation, the suction head (the total length of the suction head, the shape of the tip of the suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01L3/02G01F13/00G01F25/00G01N1/00
CPCG01N1/00G01F13/00B01L3/021B01L2200/148B01L2300/0645G01F25/0084G01G1/00G01G23/01G01F11/022G01F11/023G01F11/027B01L3/0227B01L3/0237B01L2300/0627B01L2300/0832
Inventor 出云直人深见雄二
Owner A&D CO LTD