Pulse jet ejection head diagnostic system

Pulse jet head diagnostic systems (Fig. 2A; Fig. 2B) are provided for a pulse jet biopolymeric array fabrication device (Fig. 1). The system and associated method enable electrically monitoring signals produced or output by a driver (404) for effecting droplet ejection from an ejection head (210a, 210b) spaced from a substrate surface and during movement relative to the substrate (10) onto the substrate surface. Real-time errors in performance may be reported, or results simply recorded for post-fabrication quality control. Quality control checking may be performed in-process during array fabrication or the systems described may be used as off-line diagnostic tools for ejection elements and/or fire pulse aspects of an array fabrication system. A computer program product that can execute the foregoing methodology and/or provide results of the same is also provided.