Patent ID: 6154712
Filing Date: 2000-11-28
Classification: G01R

Abstract:
A test procedure for carrying out a series of measurements on a large number of identical products after they have been manufactured, which comprises:a) testing a parameter of a product under test with a first test apparatus using a first input signal for producing a first test result;b) testing the parameter of the product under test with a second test apparatus using a second input signal independent of the first input signal for producing a second test result independent of the first test result;c) calculating a value of a difference between the first test result and the second test result;d) evaluating statistically and with the aid of a computer the first test result, the second test result and the value of the difference with earlier determined data determined in an identical series of measurements on earlier tested products;e) outputting a fault message if the value of the difference is outside a tolerance interval; andf) repeating steps a) and e) for at least one other parameter.