TGS2442 Datasheet, PDF (16/25 Pages) List of Unclassifed Manufacturers – Detection of Carbon Monoxide

Revised 04/01
CALIBRATION OF TGS2442
Signal Processing and
Calibration Techniques
for CO Detectors
Using TGS2442
This brochure offers users
important technical advice for
handling and calibration of the
TGS2442 CO sensor, including
calibration techniques using a
microprocessor. Detector circuit
and calibration facility design
should be carried out with these
points in mind.
Page
Basic Circuit Structure..................................................................2
Method of Signal Processing
Basic flow.............................................................................2
Detection of sensor-related trouble conditions............................2
Calculation of CO concentration
Sensor resistance (Rs) calculation..................................4
Temperature compensation of ƒ(Rs)..................................4
Compensation for variation in Rs grades......................5
Compensation for variation within β grades......................5
Converting ƒ(Rs^) to CO concentration output...............5
Calibration Using Classified Sensors
Preheating...................................................................................6
Pre-calibration
Select a load resistor............................................6
Compensation according to β grade.................................6
Main calibration....................................................................7
Appendix-Calibration at two or more concentrations...................8
Ability of Sensor to Meet Performance Standards
Requirements of performance standard.......................................8
Estimation of calibration accuracy.................................9
Conclusion........................................................................9
IMPORTANT NOTE: OPERATING CONDITIONS IN WHICH FIGARO SENSORS ARE USED WILL VARY
WITH EACH CUSTOMER’S SPECIFIC APPLICATIONS. FIGARO STRONGLY RECOMMENDS
CONSULTING OUR TECHNICAL STAFF BEFORE DEPLOYING FIGARO SENSORS IN YOUR APPLICATION
AND, IN PARTICULAR, WHEN CUSTOMER’S TARGET GASES ARE NOT LISTED HEREIN. FIGARO
CANNOT ASSUME ANY RESPONSIBILITY FOR ANY USE OF ITS SENSORS IN A PRODUCT OR
APPLICATION FOR WHICH SENSOR HAS NOT BEEN SPECIFICALLY TESTED BY FIGARO.
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