发明名称 |
Calibration of dust monitoring instruments |
摘要 |
Disclosed is a method and apparatus for calibrating and recalibrating a photometric measurement instrument which supervises the presence of dust in a particular location as produced by a process during which dust is developed on an irregular basis. The method is characterized in that the calibration is initiated upon the detection of a condition in which dust concentration is expected to be low. In a steel-making process, such a condition occurs upon termination of the blowing phase of a converter. In the case of smoke in a flue, such a condition occurs when there is an absence of gas flow in the flue.
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申请公布号 |
US4197013(A) |
申请公布日期 |
1980.04.08 |
申请号 |
US19770759484 |
申请日期 |
1977.01.14 |
申请人 |
MANNESMANN AG |
发明人 |
DAHLMANN, HEINZ;GAUTER, HELMUT;THIELMANN, WILHELM;VAN ACKEREN, PAUL |
分类号 |
G01N21/53;(IPC1-7):G01N21/28 |
主分类号 |
G01N21/53 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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