Calibration Standards for Flow Cups
Viscosity Standards are necessary for checking the entire procedure used in viscometric measurements including timing, temperature control, cleaning as well as the characteristics of the individual cups.
| Viscosity Standard | Kinetic Viscosity Centistokes | Zahn Cup | Shell Cup | Ford Cup | ISO Cup | Din Cup | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Size | Drain Time (secs) | Size | Drain Time (secs) | Size | Drain Time (secs) | Size | Drain Time (secs) | Size | Drain Time (secs) | ||
| C6 | 8.9 | – | – | 1 | 52 | – | – | 3 | 34 | – | – |
| C10 | 17 | 1 | 45 | 2 | 35 | 2 | 35 | 3 | 48 | – | – |
| C20 | 34 | 1 | 60 | 2 | 64 | 2 | 44 | 3 | 82 | – | – |
| – | – | 2.5 | 40 | – | – | – | – | – | – | ||
| C35 | 66 | 2 | 33 | 2.5 | 74 | 2 | 63 | 4 | 53 | – | – |
| – | – | 3 | 46 | 3 | 35 | – | – | – | – | ||
| – | – | 3.5 | 32 | – | – | – | – | – | – | ||
| C60 | 120 | 2 | 48 | 3.5 | 57 | 3 | 58 | 4 | 89 | 4 | 30 |
| – | – | 4 | 36 | 4 | 36 | – | – | – | – | ||
| C100 | 230 | 3 | 27 | 4 | 68 | 4 | 64 | 6 | 34 | – | 52 |
| – | – | 5 | 36 | – | – | – | – | – | – | ||
| C200 | 460 | 3 | 47 | 5 | 72 | – | – | 6 | 67 | – | 102 |
| 4 | 36 | 6 | 29 | – | – | – | – | – | – | ||
| C350 | 850 | 4 | 62 | 6 | 53 | – | – | – | – | – | – |
| 5 | 37 | – | – | – | – | – | – | – | – | ||
| C600 | 1600 | 5 | 70 | – | – | – | – | – | – | – | – |