accuracy
In ultrasonic analog sensing specifications, it is the relationship between output magnitude and actual object position, expressed in terms of the span. Using the Model SM506 analog sensor with a 4 to 20 mA output as an example: If the sensor is set up with a 20" span between the near and far limit and the sensor's output current reads 12 mA, the object is expected to be 10" from the near limit. The Accuracy specification indicates a possible maximum object position error of +0.50% of the span, or 0.1"(0.005 x 20). This means the distance at 12 mA can vary between 9.9" and 10.1" in that span.
