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Error calibration method of resistance wood moisture meter

A moisture tester, error calibration technology, applied in the direction of material resistance, etc., can solve the problems of inconvenient operation, difficult to achieve on-site test calibration, high calibration cost, etc.

Inactive Publication Date: 2011-03-16
广东省世通仪器检测服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calibration costs are high, operation is inconvenient, it is difficult to achieve on-site test calibration, and the applicable occasions are limited
There is nothing you can do for testers that are frequently used, used in field work, and cannot be separated from the work site

Method used

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  • Error calibration method of resistance wood moisture meter
  • Error calibration method of resistance wood moisture meter
  • Error calibration method of resistance wood moisture meter

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The test error calculation method that the present invention adopts is:

[0013] Δ=Ux-Un

[0014] In the formula: Δ——test error value

[0015] Ux——the reading value (display value) of the instrument being calibrated;

[0016] Un - standard value;

[0017] The present invention is practiced under the following table 1 calibrated environmental conditions:

[0018] Table 1 Environmental conditions for calibrating wood moisture tester

[0019] Amount of influence

standard value

Allowable deviation

Environmental conditions / °C

20

±10

Relative Humidity / %RH

60

±20

Power supply voltage / V

220

±10％

Power frequency / Hz

50

±1

[0020] The equipment used in the present invention is: megohmmeter verification device (adjustable standard resistance box). The maximum allowable error of the megohmmeter verification device should be less than 1 / 3-1 / 5 of the allowable error o...

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PUM

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Abstract

The invention relates to an error calibration method of a resistance wood moisture meter. The method adopts the mode that the standard resistance is measured and the instruction is read. The method comprises the following steps: a wood moisture meter to be calibrated is placed in the calibration environment for more than one hour; the wood moisture meter to be calibrated is switched on to preheat; according to the wood moisture resistance table, a standard resistance value Un is selected by means of the standard resistor; a tree species which is more suitable for the wood moisture meter to be calibrated is selected for the wood moisture meter; then the selected standard resistance value is detected, an indicated value Ux is read; the selected tree species and the indicated value Ux are recorded; the absolute error Delta is calculated according to a formula, namely Delta=Ux-Un. By adopting the method, the testing method becomes simple and convenient, the testing device is convenient to carry and the in-situ test can be performed conveniently, thus great convenience can be brought for the consumer.

Description

technical field [0001] The invention relates to an error calibration method for a resistive wood moisture tester, which mainly relates to a test instrument calibration method, in particular to an error calibration method for a resistive wood moisture tester. Background technique [0002] The resistance wood moisture tester can test the moisture content of wood non-destructively, and is widely used in multiple processing processes from wet wood to dried wood, processed wood to finished commercial wood. Simply adjust the material selection dial on the face of the instrument to measure the moisture content of the selected type of wood. The resistance wood moisture tester converts the humidity indication value of different woods by reading the resistance value between the electrodes. [0003] In the prior art, the testing and proofreading of the error of the resistance type wood moisture meter are all carried out with the help of special testing instruments imported from abroad...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 冯社雄
Owner 广东省世通仪器检测服务有限公司
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