Measuring and testing – Gas analysis – Gas chromatography
Patent
1979-01-08
1980-05-27
Kreitman, Stephen A.
Measuring and testing
Gas analysis
Gas chromatography
250345, G01N 3108
Patent
active
042044243
ABSTRACT:
A method and apparatus for adjusting the gain of the sample and reference outputs of a chromatographic analyzer detector with respect to a reference voltage is provided. The detector sample output is compared to a voltage reference and this comparison is utilized to drive a dual color light-emitting diode. The light-emitting diode emits a first color when the gain is too high and emits a second color when the gain is too low. When the gain is correctly set so that the sample output is equal to the reference voltage when only carrier fluid is flowing through the sample side of the chromatographic analyzer detector, the light-emitting diode emits no light, thereby indicating that the gain is correctly set. A corresponding procedure is utilized to set the gain of the reference side of the chromatographic analyzer detector. The light-emitting diodes are also particularly useful as a diagnostic aid in optical absorbence chromatographic analyzer detector systems.
REFERENCES:
patent: 3897154 (1975-07-01), Hawes
patent: 4158772 (1979-06-01), Reedy
Schweber, B.; "Two-Color LED Pair Is Digital Status Indicator"; Electronic Designers Casebook, Electronics, p. 127.
Mazur, T.; "Analog Voltage Sensor Controls LED Threshold," Electronic Designers Casebook, Electronics, p. 51.
Franco, S.; "LED Display Shows Beat Frequency," Electronic Designers Casebook, Electronics, p. 42.
"Spectra-Physics SP8200 Dual Beam UV/Visible Detector".
Kreitman Stephen A.
Phillips Petroleum Company
LandOfFree
Chromatographic analyzer detector gain adjustment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chromatographic analyzer detector gain adjustment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chromatographic analyzer detector gain adjustment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1114056