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Method for adjusting measuring device

A measuring device and a technique for adjusting measurement, applied in the direction of measuring device, transmittance measurement, color/spectral characteristic measurement, etc.

Active Publication Date: 2018-06-15
ENDRESSHAUSER CONDUCTA GMBHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depending on the application and temperature differences between the two systems, this may take several minutes

Method used

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Embodiment Construction

[0018] The method for adjusting a measuring device comprises the following method steps. First, a laboratory calibration of the measuring equipment is performed. This includes the following method steps. First, a measurement sensor in a laboratory is immersed in water as a calibration solution, and a measurement signal of the measurement sensor is detected. The laboratory calibration value is determined in water from the detected measurement signal. Then, determine the laboratory calibration value of the measuring sensor in air. A correction factor can be derived from the laboratory calibration value in water and the laboratory calibration value of the measuring sensor in air, by which the laboratory calibration value in air can be corrected to the laboratory calibration value in water.

[0019] Following the laboratory calibration, an on-site calibration is performed at a location where the measurement sensor is used, such as a process plant, and the on-site calibration in...

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PUM

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Abstract

The invention relates to a method for adjusting a measuring device. The method comprises the steps of performing a first laboratory calibration of the measuring device based upon at least one measurement signal detected by a measuring sensor in a calibration solution; performing a second laboratory calibration of the measuring device based upon at least one measurement signal detected by a measuring sensor in air; determining a correction factor for correcting a laboratory calibration value of the measuring device based upon the at least one measurement signal detected by the at least one measuring sensor in air to a laboratory calibration value of the measuring device based upon the at least one measurement signal detected by the at least one measuring sensor in the calibration solution;performing an on-site calibration of the measuring device based upon at least one measurement signal detected by the a measuring sensor in air to produce an on-site calibration value; correcting the on-site calibration value using the correction factor; and performing an on-site adjustment of the measuring device using the corrected on-site calibration value.

Description

technical field [0001] The invention relates to a method for adjusting a measuring device which measures a measured variable of a medium by means of at least one measuring sensor. Background technique [0002] Optical absorption measurements require laboratory calibration values ​​for determining physical variables such as extinction and subsequent transmission, absorption, etc. This laboratory calibration value is usually determined in a liquid calibration solution, preferably deionized or ultrapure water. [0003] Adjusting laboratory calibration values ​​to compensate for any systematic changes in the sensor over its lifetime is critical to obtaining correct measurements. For this a liquid calibration solution must be provided. [0004] The quality of laboratory calibration depends largely on the quality of the calibration solutions. The availability of high-quality deionized or ultrapure water on site cannot always be guaranteed. Therefore, these need to be provided ...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/01
CPCG01N21/01G01N21/31G01N21/274G01N21/278G01N21/59G01N2201/127
Inventor 弗兰克·米勒彼得·林德穆勒丹尼尔·伊滕
Owner ENDRESSHAUSER CONDUCTA GMBHCO