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Error preventing method for zero point or gain calibration of solid and portable gas detector

A gas detector and portable technology, which is applied in the field of gas detectors, can solve problems such as damage, and achieve the effect of avoiding wrong calibration and accurate calibration results.

Inactive Publication Date: 2012-08-15
MSA CHINA SAFETY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the above-mentioned prior art, the object of the present invention is to provide an error-proof method for zero point or gain calibration of solid and portable gas detectors, which can avoid the use of inaccurate gas or the situation that the probe itself has been damaged , so that the calibration results are more accurate

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  • Error preventing method for zero point or gain calibration of solid and portable gas detector
  • Error preventing method for zero point or gain calibration of solid and portable gas detector
  • Error preventing method for zero point or gain calibration of solid and portable gas detector

Examples

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Embodiment 1

[0016] Example 1, see figure 1 Shown: The error prevention method for zero point calibration of solid and portable gas detectors: it includes two steps, namely:

[0017] A) Initial calibration:

[0018] First, the tester judges whether the initial calibration is performed. The method of judging is that the detector is set with a password, and only when the password is entered correctly can the initial calibration be performed. Obviously, the password is mastered by the manufacturer. In this way, the correct zero point gas and normal probe are used to ensure the accuracy of the zero point calibration value. The specific initialization calibration method is as follows: After passing through the zero point gas for 30S (electrochemical reaction is 60S), monitor the fluctuation value of the sampling signal, until the signal fluctuation value is not greater than ±1% (full scale), the calibration value at this time is Store to the initialization calibration value and set the init...

Embodiment 2

[0022] Example 2, see figure 2 Shown: The error prevention method for gain calibration of solid and portable gas detectors: it includes two steps, namely:

[0023] A) Initial calibration:

[0024] First, the tester judges whether the initial calibration is performed. The method of judging is that the detector is set with a password, and only when the password is entered correctly can the initial calibration be performed. Obviously, the password is mastered by the manufacturer. In this way, the correct gain gas and normal probe are used to ensure the accuracy of the gain calibration value. The specific initialization calibration method is as follows: After feeding the gain gas for 30S (electrochemical reaction is 60S), monitor the fluctuation value of the sampling signal, until the signal fluctuation value is not greater than ±1% (full scale), the calibration value at this time is Store to the initialization calibration value and set the initialization calibration flag.

...

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Abstract

The invention discloses an error preventing method for zero point or gain calibration of a solid and portable gas detector. The method comprises the following steps of: initial calibration: monitoring the fluctuation value of sampling signals, storing the calibration value to an initial calibration value when the signal fluctuation value is not more than + / -1 percent (full range), and setting an initial calibration mark; and conventional calibration: monitoring the fluctuation value of field sampling signals, acquiring a stable signal when the fluctuation value of the field sampling signals is not more than + / -1 percent (full range), comparing the stable signal with the last calibration signal of the detector, storing the calibration value when the difference between the stable signal and the last calibration signal is not more than + / -10 percent (full range), and ending the calibration. The optimized detector is provided with a password, and the initial calibration can be performed by inputting the accurate password. The method has the advantage that the calibration result is accurate under the condition that an inaccurate gas or a damaged probe can be prevented from being used for calibration.

Description

technical field [0001] The invention relates to the technical field of using gas detectors, in particular to an error prevention method for zero point or gain calibration of solid and portable gas detectors. Background technique [0002] Dangerous gases may exist in industrial sites such as petroleum, chemical industry, pharmaceuticals, coal mines, ships, and municipal facilities. These dangerous gases include flammable gases such as methane and poisonous gases such as hydrogen sulfide and carbon monoxide. The aforementioned dangerous gases seriously affect people's health and the normal operation of industrial equipment, therefore, they need to be detected frequently at the job site. Generally, the equipment used to detect these gases is solid and portable gas detectors. The detector mainly uses catalytic combustion for combustible gas detection and electrochemical principle for toxic gas detection. When using these two principles for gas detection, there will be a probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12G01N27/26
Inventor 何华龙蔡娟
Owner MSA CHINA SAFETY EQUIP