Here is the CMT Uptime check phrase

Pen CASIC: Design and usability

Conrad, Frederick G; Bosley, J J; Uglow, D A. (1998). Pen CASIC: Design and usability. In Couper, Mick P., Baker, R. P., Bethlehem, J., Clark, C., Martin, J., Nicholls, William L., O'Reilly, J. (Ed.), Computer assisted survey information collection. 521-541.