APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM

Revision: <strong>Final</strong> <strong>Report</strong>
Date: May 25, 2012
Data report forms Page 2/5
<strong>Report</strong> Form 1 (For Rockwell hardness scale B)
Metrology information
Model of hardness primary machine SHT-31
Serial number of hardness primary machine 310037
Manufacturer of hardness primary machine Akashi
Hardness indication system Laser Hologauge
Test force system Lever
Relative error of preliminary test force 0.166%
Relative uncertainty (2) of preliminary test force 0.126%
Relative error of total test force 0.025%
Relative uncertainty (2) of total test force 0.030%
Uncertainty of depth measuring device 0.12 ㎛
The calibration and measurement capability (CMC) 0.6 HRBW
Testing condition
Velocity of the indenter when reaching the surface 25㎛/s ~ 37㎛/s
Holding time of preliminary test force 3.0 sec
Test force loading speed 5.0 sec
Total test force duration time 4.0 sec
Time before reading permanent indentation depth 1.0 sec
Environment of comparison measurement
Measurement place KRISS
Measurement date Sep. 30, 2010
Environment 23 °C, 43% R.H.
Deformation of frame verification
Deformation of frame (m)
1 2 3
-0.2 -0.2 -0.2
Page 52 of 77