Portable Force Machine Solves Several Measurement Management Headaches. This paper examines several “bad” measurement practices, such as using multiple technicians to calibrate instruments (including hand-held dynamometers). Such practices include using a free-floating cable and stacking weights to calibrate a cable tensiometer. We discuss how a portable force calibration machine can be used to improve efficiency and solve several measurement challenges. Click Here to read our portable force calibration machine paper.