This paper describes the development of a new version of the calibration procedure for the QinetiQ Cognition Monitor so that it can be implemented to support the development of a cognitive cockpit at NAVAIR. A new signal cleaning procedure for processing the electro-encephalogram (EEG) automatically is outlined and the results from tests in the UK and US are summarized. It is concluded that estimates of the content of the EEG signal at high frequencies are important to gauges measuring verbal and spatial workload. The combination of results from UK and US tests suggests that the cleaning procedure is effective, although increased robustness of the verbal gauge is desirable.