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Calibration and Measurement Capabilities
Length
In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a2 + b2]1/2
 
Result of the search
Your selection : Length
 
Viet Nam, VMI-STAMEQ (Viet Nam Metrology Institute, Directorate for Standards and Quality)
Complete CMCs in Length for Viet Nam (.PDF file)
Diameter standard. External cylinder (plug): diameter L, 1 mm to 200 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: [0.38, 1.8L], L in m, value varies from 0.38 µm to 0.52 µm
Length measuring machine with laser interferometer
Temperature: (20 ± 0.5) °C
Approved on 28 February 2011
Internal NMI service identifier: VMI-STAMEQ/V01-41
 
End standards. Gauge blocks: central length L, ceramic, 0.5 mm to 100 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[62, 1.50L], L in mm, value varies from 62 nm to 163 nm
Mechanical comparison
Temperature: (20 ± 0.5) °C
Approved on 28 February 2011
Internal NMI service identifier: VMI-STAMEQ/V01-06
 
End standards. Gauge blocks: central length L, steel, 0.5 mm to 100 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[28, 0.30L], L in mm, value varies from 28 nm to 41 nm
Interferometry extract fraction
Temperature: (20 ± 0.5) °C
Approved on 28 February 2011
Internal NMI service identifier: VMI-STAMEQ/V01-52
 
End standards. Gauge blocks: central length L, steel, 0.5 mm to 100 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[64, 1.5L], L in mm, value varies from 64 nm to 163 nm
Mechanical comparison
Temperature: (20 ± 0.5) °C
Approved on 28 February 2011
Internal NMI service identifier: VMI-STAMEQ/V01-06
 
End standards. Gauge blocks: central length L, tungsten carbide, 0.5 mm to 100 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[62, 1.20L], L in mm, value varies from 62 nm to 135 nm
Mechanical comparison
Temperature: (20 ± 0.5) °C
Approved on 28 February 2011
Internal NMI service identifier: VMI-STAMEQ/V01-06
 
Laser radiations. Stabilized He-Ne laser: absolute frequency, 474 THz
Absolute expanded uncertainty (k = 2, level of confidence 95%) in kHz: 24
Optical beat frequency
Temperature: (20 ± 3) °C
Approved on 28 February 2011
Internal NMI service identifier: VMI-STAMEQ/V01-50


 
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