Providing design engineerswith a simplified means of compensating for device-to-device variationin optoelectronic sensors, TT electronics OPTEK Technology hasdeveloped an automatic calibration design kit. The OCB100-Kitfeatures a driver board with three different optoelectronic circuitsto enable design engineers to easily calibrate optoelectronic devices,provide a consistent output signal, and shorten their design cycle."The OCB100 Series driver board is configured to calibrate reflectiveor interruptive devices, allowing designers to compensate for devicevariations due to manufacturing differences, temperature changes,power fluctuation and device aging commonly present in optoelectronicsystems," said Alan Bennett, vice president of sales and marketing forOPTEK Technology. "Requiring only an external power supply andthe optical device to be tested, the design kit enables engineers toeasily adapt and calibrate any OPTEK sensor to any unique application."The OCB100 Series system calibrates reflective, interruptive andspecial opto sensors to produce a consistent output, eliminating theneed to confirm either the LED drive resistance or phototransistorload resistance to provide a steady state condition. The reliabilityand consistency of the system is further enhanced by giving thedesigner the ability to narrow the device's expected startupoutput state. Degradation of the LED or phototransistor iscompensated for each time the system is calibrated.Optoelectronic devices can be mounted directly to the OCB100Series driver board, or use a connectorized configuration toprovide for remote mounting.Four lights are featured on the board that indicate: when thedevice is calibrated (green LED flashes 3 times); that the devicecould not be calibrated (red LED); and when the analog outputhas reached the logical trip point higher than the calibration point(blue LED) or lower than the calibration point (green LED).The internal phototransistor load resistance can be set for threedifferent values (~2.5Kohms, ~9.6Kohms or ~27Kohms).The OCB100 Series auto-calibration design kit includes:·OCB100CZ - PC board calibration circuit, including OCB100 MC24mating cable;·OPB350C125Z - Fluid sensor for 0.125" (3.18mm) O.D. tubing;·OPB732CZ - Medium distance reflective object sensor;·OPB885CZ - Slotted switch with 0.375" (9.53mm) slot width;·0.125" tubing sample;·Label/liner sample.
