Auto-Calibration Design Kit


Providing design engineers
with a simplified means of compensating for device-to-device variation
in optoelectronic sensors, TT electronics OPTEK Technology has
developed an automatic calibration design kit. The OCB100-Kit
features a driver board with three different optoelectronic circuits
to 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 reflective
or interruptive devices, allowing designers to compensate for device
variations due to manufacturing differences, temperature changes,
power fluctuation and device aging commonly present in optoelectronic
systems," said Alan Bennett, vice president of sales and marketing for
OPTEK Technology. "Requiring only an external power supply and
the optical device to be tested, the design kit enables engineers to
easily adapt and calibrate any OPTEK sensor to any unique application."

The OCB100 Series system calibrates reflective, interruptive and
special opto sensors to produce a consistent output, eliminating the
need to confirm either the LED drive resistance or phototransistor
load resistance to provide a steady state condition. The reliability
and consistency of the system is further enhanced by giving the
designer the ability to narrow the device's expected startup
output state. Degradation of the LED or phototransistor is
compensated for each time the system is calibrated.

Optoelectronic devices can be mounted directly to the OCB100
Series driver board, or use a connectorized configuration to
provide for remote mounting.

Four lights are featured on the board that indicate: when the
device is calibrated (green LED flashes 3 times); that the device
could not be calibrated (red LED); and when the analog output
has 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 three
different values (~2.5Kohms, ~9.6Kohms or ~27Kohms).

The OCB100 Series auto-calibration design kit includes:

·OCB100CZ - PC board calibration circuit, including OCB100 MC24
mating 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.
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