Sl. No.

Parameter/ measured quantity

Range

Best measurement capability

(±)

1

Verification of Rockwell Hardness Tester as per IS: 1586-2000       (RA 2006)

HRA

HRB

HRC

HRN

HRT

2.5 HRA

2.6 HRB

2 HRC

3.5 HRN

3.6 HRT

2

Verification of Brinell Hardness Tester as per IS: 2281-1983      (RA 2005)

BHN 5/750

BHN 10/3000

3.18%

3.20%

3

Verification of Vickers Hardness Tester as per IS: 1754-2002

HV 5

HV 10

HV 30

3.7%

3.62%

3.2%