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我厂于1985年引进了一台美国LECO公司的RH-1E定氢仪,在经过安装调试后,按原测定方法进行了试验,结果不够理想,随后又作了一些试验研究,取得了一些经验,现简要介绍如下: 一、坩埚氢空白值的测定和扣除方法 1.原法空白值的扣除方法是先测7次以上坩埚空白值,稳定后,设定自动空白值扣除,出厂报告单上的除气电流是800A,实测LECO坩埚20次,能达到800A的只有3次,占15％,其余皆在750A以下,而且除气电流不能每次随意调整,空白值难以稳定,大约在0.15～0.78ppm之间波动。分析电流600或650A。
I plant in 1985, the introduction of a US company LECO RH-1E hydrogen analyzer, after installation and testing, according to the original test method was tested, the result is not satisfactory, then made some experimental study and made some experience , Are briefly described as follows: First, the crucible hydrogen blank value determination and deduction 1. The original method of blank value deduction is to measure more than 7 times the crucible blank value, stable, set the automatic blank value deduction, the factory report Of the degassing current is 800A, measured LECO crucible 20 times, can reach 800A only 3 times, accounting for 15%, the rest are below 750A, and the degassing current can not be adjusted at any time, the blank value is difficult to stabilize, about 0.15 ~ Fluctuation between 0.78ppm. Analyze the current 600 or 650A.