Automatic calibration circuit for gas analyzers

Details Automatic calibration circuit for gas analyzers Automatic calibration circuit for gas analyzers

1977-10-31

1979-09-11

Demeo, Palmer C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250573, G01J 132, G01N 2126, G05D 2502

Patent

active

041676653

ABSTRACT:
A device for measuring the concentration of a radiation-absorbing agent in a gas mixture features circuitry for automatically calibrating the device according to a reference gas mixture. An error detector compares the transmittivity of the reference gas mixture, as determined by a photometer, to a reference current determined by Beer's Law. The error signal thus generated is provided to a sample and hold circuit which includes a digital counting circuit and a digital-to-analog converter. The output of the sample and hold circuit causes the drive current supplied to the radiation source of the photometer to be adjusted to automatically calibrate the device.

REFERENCES:
patent: 3919702 (1975-11-01), Hayes et al.
patent: 3994601 (1976-11-01), Brugger

Affiliated with

Also associated with

Rating

Automatic calibration circuit for gas analyzers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic calibration circuit for gas analyzers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic calibration circuit for gas analyzers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-478935