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Calibration device and application method of a bod measuring instrument

A technology for calibrating devices and measuring instruments, which is applied in the field of environmental testing instruments, can solve the problems of small application areas of BOD measuring instruments, and achieve the effects of short calibration time, high efficiency, and simple operation

Inactive Publication Date: 2019-04-12
SHENZHEN ACAD OF METROLOGY & QUALITY INSPECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, due to the small application area of ​​the verification work of the BOD measuring instrument, there is no calibration equipment on the market that uses the standard manometer method to calibrate the upgraded BOD measuring instrument. Therefore, it is urgent to develop an efficient BOD measuring instrument calibration. The device calibrates the instrument to improve detection efficiency

Method used

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  • Calibration device and application method of a bod measuring instrument
  • Calibration device and application method of a bod measuring instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 , figure 2 As shown, it includes a gas path part and a circuit part. The gas path part includes a negative pressure generating device 1 and a pressure vessel 2 for calibration. The negative pressure generating device 1 includes a differential pressure control module 3, and the differential pressure control module 3 It is connected with the pressure vessel 2 for calibration, and the circuit part includes a main control circuit 10, a communication circuit 20, a pressure acquisition total circuit 30 and a drive circuit 40, and the communication circuit 20, the pressure acquisition total circuit 30 and the drive circuit 40 are connected with the main control circuit 20 respectively. The control circuit 10 is connected, the pressure acquisition general circuit 30 includes a pressure sensor 301, the pressure sensor 301 is connected to the pressure vessel 2 for calibration, the drive circuit 40 is connected to the differential pressure control module 3, and t...

Embodiment 2

[0053] Such as figure 2 As shown, on the basis of Embodiment 1, the circuit part further includes a storage circuit 60 connected to the main control circuit 10, and the storage circuit 60 is used for storing input instructions or measurement records.

[0054] The storage circuit 60 is provided, which can not only store the input instructions, but also store the previous measurement records, which is convenient for the operator to check. With this technical solution, the function of the BOD measuring instrument calibration device is more complete and easy to use.

[0055] Further, the circuit part also includes a temperature and calendar circuit 70 connected to the main control circuit 10, and the temperature and calendar circuit 70 provides temperature and calendar information for the calibration device of the BOD measuring instrument. By adopting this technical scheme, the function of the calibration device of the BOD measuring instrument is more complete and the use is conv...

Embodiment 3

[0057] On the basis of Example 2, such as figure 2 As shown, a preferred embodiment of the circuit part is that the circuit part further includes a display screen interface circuit 80 connected to the main control circuit 10, and the display screen interface circuit 80 is used for connecting an external display screen.

[0058] The communication circuit 10 includes a serial communication circuit and a communication interface sequentially connected, wherein the serial communication circuit is connected to the main control circuit, the communication interface is connected to an external computer 200, and the communication interface is connected to the serial communication circuit through an interface.

[0059] The driving circuit 40 includes a primary driving circuit, a vacuum pump driving circuit, a solenoid valve driving circuit A, and a solenoid valve driving circuit B, and the vacuum pump driving circuit, the solenoid valve driving circuit A, and the solenoid valve driving c...

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Abstract

The invention discloses a BOD (biochemical oxygen demand) tester calibration device and an application method thereof. The BOD tester calibration device comprises a gas path part and a circuit part, the gas path part comprises a negative pressure generation device and a calibration pressure vessel, the negative pressure generation device comprises a pressure differential control module which is connected with the calibration pressure vessel, the circuit part comprises a main control circuit, a communication circuit, a pressure-acquisition total circuit and a drive circuit, the communication circuit, the pressure-acquisition total circuit and the drive circuit are connected with the main control circuit, the pressure-acquisition total circuit comprises a pressure sensor, the pressure sensor is connected with the calibration pressure vessel, the drive circuit is connected with the pressure differential control module, and the communication circuit is connected with a computer. The invention further provides the application method of the BOD tester calibration device. By the arrangement, negative pressure is generated from the negative pressure generation device, the circuit part realize control on pressure variation of the calibration pressure vessel, simpleness in operation is achieved, result uncertainty is small, calibration time is short, and high efficiency is realized.

Description

technical field [0001] The invention relates to an environment detector, in particular to a calibration device and an application method of a BOD detector. Background technique [0002] The BOD meter is an instrument that evaluates the degree of water pollution by measuring the biochemical oxygen demand. BOD is the abbreviation of biochemical oxygen demand, which is an important indicator that uses the amount of dissolved oxygen consumed by microbial metabolism to indirectly indicate the degree of water body pollution by organic matter. [0003] Due to the development of intelligent equipment, the BOD tester has also been upgraded, mainly from the traditional scaled U-tube differential pressure gauge to a digital pressure sensor, and its structure has also changed. Its working principle is as follows: [0004] During the measurement process of the BOD analyzer, select the range according to the measurement range, add the water sample with a certain volume into the culture b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/18
CPCG01N33/1806
Inventor 罗逸龙李名兆黄志凡李建波李向召刘慧平
Owner SHENZHEN ACAD OF METROLOGY & QUALITY INSPECTION
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