| Calibrated Device | Standard glass scale, Standard scale, Microscope standards |
|---|---|
| Range | (1) Standard glass scale, Standard scale, Microscope standards: 0.01 mm to 200 mm (2) Standard glass scale, Standard scale: 0.01 mm to 500 mm (3) Standard glass scale, Standard scale, Microscope standards: 0.01 mm to 1000 mm |
| Uncertainty | [29.62 + (0.132L)2]1/2 nm L: line spacing in mm |