Table 2 The relation between the number of motor steps and volume length from image processing
From: Automated pipette failure monitoring using image processing for point-of-care testing devices
Steps | 40 | 80 | 120 | 160 | 200 | 240 | 280 | 320 |
|---|---|---|---|---|---|---|---|---|
Mean | 72 | 101.6 | 126.8 | 143.8 | 159.6 | 173.6 | 189.2 | 198.4 |
STD | 1.87 | 0.55 | 1.30 | 2.28 | 2.79 | 5.32 | 2.49 | 3.05 |
CV (ppm) | 2.6 | 0.5 | 1.0 | 1.6 | 1.7 | 3.1 | 1.3 | 1.5 |
Steps | 360 | 400 | 440 | 480 | 520 | 560 | 600 | 640 |
|---|---|---|---|---|---|---|---|---|
Mean | 209.6 | 218.8 | 226.8 | 234.2 | 244.6 | 251.2 | 256.8 | 259.2 |
STD | 2.19 | 2.49 | 2.59 | 2.95 | 0.89 | 1.30 | 1.79 | 2.17 |
CV (ppm) | 1.0 | 1.1 | 1.1 | 1.3 | 0.4 | 0.5 | 0.7 | 0.8 |