Calibration Procedures and Type of Instruments/Materials to be calibrated |
Range |
Expanded Uncertainty* (Level of Confidence Approximetly 95%) [L(mm):Normal length] |
Length
Measuring
Instrument |
Gauge blocks
(Interferometry method) |
From 0.1 mm up to 100 mm |
0.020 μm |
More than 100 mm up to 250 mm |
(0.010 + 0.00010·L ) μm |
More than 250 mm up to 1000 mm |
(0.020 + 0.00020·L ) μm |
Gauge blocks
(Comparison method) |
From 0.1 mm up to 100 mm |
0.06 μm |
More than 100 mm up to 1000 mm |
(0.04 + 0.00043·L ) μm |
End gauges with flat ends
(Interferometry method) |
More than 1 mm up to 2010 mm |
(0.26 + 0.54·L /1000) μm |
Up to 1mm |
0.030 μm |