Hi,

Are you a resistors manufacturer?

From page 3: (THEORY of OPERATION)
http://www.harris-irt.com/anonymousftp/irtman5012xp.pdf

The 16F877 Microprocessor based circuit includes a dual limit comparator which compares
the measured resistance with upper and lower tolerance values entered on front panel thumbwheels.
Red and green front panel light emitting diodes indicate whether or not the resistance is within tolerance.
An output relay permits the resistance tester to be converted to a rejection device.
For “fail-safe” operation the contacts are normally open. The contacts close if the part is
within tolerance. The Microprocessor based circuit also provides for electronic range switching
and system control.



Best regards,

Luciano