| Measurement range for the main scales |
| Rockwell |
20 – 70 HRC* |
| Brinell |
20 – 650 HB* |
| Vickers |
230 – 940 HV* |
| *The hardness tester can be recalibrated across a broader and individual range of scales when reference samples with corresponding hardness values are available. |
| Measurement error |
Subject to following recommendations * |
Requirements of ISO and ASTM standards |
| Rockwell |
±0.2 HRC |
±2 HRC |
Brinell, in the range
90-180 HB
180-250 HB
250-460 HB |
± 3 HB |
±10 HB
±15 HB
±20 HB |
Vickers in the range
240-500 HV
500-800 HV
800-940 HV |
± 3 HV |
+/– 15 HV
+/– 20 HV
+/– 25 HV |
* To achieve maximum accuracy and repeatability in measurements, it is necessary to:
– Adhere to the requirements for the roughness of the gauge or product;
– Improve operator skills; Follow the measurement guidelines outlined in the user manual;
– For precise positioning in UCI measurements, it is recommended to use a stand. |