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Hiroshima Calibration Center, Mitutoyo Corporation

The Hiroshima Calibration Center, as a global MRA accredited laboratory, provides calibration services of micrometers, calipers and dial gages; standards such as ring gages and standards for micrometer; roughness specimen; and for hardness reference blocks.
Accreditation No.
JCSS0109
Accredited Laboratory
Name : Hiroshima Calibration Center, Mitutoyo Corporation
Scope
[Length]

Calibration Procedures and
Type of Instruments/Materials
to be calibrated		 Range Expanded Uncertainty*
(Level of Confidence
Approximately 95%)
(L (mm):Nominal length)
Length
Measuring
Instrument		 Dial gauges Up to 5 mm 1.0 μm
Up to 10 mm 1.3 μm
Up to 100 mm 2.1 μm
Dial test indicators Up to 0.6 mm 0.8 μm
Up to 1.6 mm 1.2 μm
Calibration testers for
dial gauges		 Up to 5 mm 0.18 μm
Up to 25 mm 0.3 μm
Calipers Up to 600 mm 0.02 mm
More than 600 mm up to 1000 mm 0.03 mm
Height gauges Up to 1000 mm 0.02 mm
Micrometers Up to 25 mm 0.3 μm
Up to 500 mm (1.2 + L /175) μm
Depth Gauges Up to 600 mm 0.02 mm
More than 600 mm up to 1000 mm 0.03 mm
End gauges with Flat ends
(Comparision methed)		 From 25 mm up to 1000 mm (0.5 + 1.2·L /1000) μm
Ring gauges From 6 mm up to 80 mm 0.7 μm
From 80 mm up to 120 mm 0.8 μm
Indicating Micrometers Micrometer Up to 100 mm (0.9 + L /250) μm
Indicator ±0.06 mm (0.3 + L /125) μm
Dimensional
Measuring
Instrument		 Surface Texture Depth
From 0.3μm up to 20μm
Arithmetical mean deviation
of the roughness profile
From 0.1μm up to 5μm
Maximum height
of the roughness profile
From 0.3μm up to 20μm
[Hardness]

Calibration Procedures and
Type of Instruments/Materials
to be calibrated		 Range Expanded Uncertainty*
(Level of Confidence
Approximately 95%)
(L (mm):Nominal length)
Permanent Laboratory On-site Calibration
Rockwell Hadness
Testing Machines, etc		 Rockwell Hardness
Reference Blocks		 From 20 HRC
up to 25 HRC		 0.43 HRC -
More than 25 HRC
less than 35 HRC		 0.44 HRC -
From 35 HRC
up to 45 HRC		 0.42 HRC -
More than 45 HRC
less than 55 HRC		 0.39 HRC -
From 55 HRC
up to 65 HRC		 0.35 HRC -
Vickers Hardness
Testing Machines, etc.		 Vickers Hardness
Reference Blocks		 From 85 HV p to 1050 HV
(Test force From 0.9807 N up to 490.3 N )		 d > 193 μm
2.2 %
d ≦ 193 μm
(228 / d) + 1.02 %
Where: d is the length of a
diagonal line of the
indentation (μm)		 －
*
These values are the smallest uncertainties. Therefore, they sometimes differ from the uncertainties written in the Calibration Certificates