Method for ascertaining the content of an ingredient of flux in

Details Method for ascertaining the content of an ingredient of flux in Method for ascertaining the content of an ingredient of flux in

1991-11-29

1993-01-12

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250373, 228 8, 228 565, G01N 2131

Patent

active

051792826

ABSTRACT:
A method and apparatus for ascertaining the content of an ingredient of flux in automatic soldering machines, in which the attenuation or transmission of electromagnetic radiation by the flux is measured, and the content of this ingredient is ascertained by comparison of the measured value with known values, stored in memory, wherein to avoid contamination of the measured flux and the production of new waste substances, the attenuation or transmission is measured in a frequency range in which a strong attenuation by the ingredient to be determined occurs; and moreover a comparison measurement of a reference medium is performed at the same frequency; and finally, the difference between the two measured values is used for comparison with the known values stored in memory.

REFERENCES:
patent: 4792078 (1988-12-01), Takahashi
patent: 4890781 (1990-01-01), Johnson et al.

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