"It’s an older unit," Doc grunted, blowing dust off the connector. "But it’s reliable. The trick isn't the hardware, kid. It’s the software. Windows 98 is picky about how it talks to these cards."
"dt80-200e-win.cpk" a firmware or driver package specifically for the Datataker DT80 range of data loggers (Series 2, 3, and 4) The ".cpk" extension indicates it is a firmware upgrade file dt80-200e-win.cpk