Technical characteristics of MET-D1 dynamic hardness tester
| Spatial position of hardness tester during measurement | any (does not influence the readings accuracy) |
| Measurement results processing in hardness tester |
computation of average value from the data stored in the memory; selective data deleting (for example, in case of doubt in the conducted measurements). |
| Measurement results computer processing |
data transfer to computer via high efficiency USB-port; in-house software. |
| Display lighting | available |
| Simultaneous indication on the display |
hardness scale measured value number of measurement operation mode archival number battery charge indication |
| Number of measurements stored in the non-volatile memory, which are not destroyed even when hardness tester is switched off | 100 |
| Automatic power disconnection, time, sec. | 150 |
|
Time of continuous operation with fully charged battery, not less, hours: without lighting with lighting from AC power |
16 8 unlimited |
| Time of full battery charging, hours | 8 |
|
Hardness tester power supply: AC mains, V / Hz battery, V consumed power, not more, V-A |
100-200 / 50-60 1,2 3,0 |
|
Temperature range, from / to /, °Ñ: during operation during transportation and storage |
-20 ... +55 -35 ... +60 |
| Relative humidity, % | 30 ... 80 |
|
Precious metals and gem stones: silver, mg |
16,8 |
|
Overall size, mm: Electronic modulus length / width / height) probe (length / diameter) |
180 õ 0,80 õ 42,4 140 / 25 |
|
Hardness tester weight, kg: electronic modulus + probe in full set (gross) |
0,61 1,3 |
| Time of one measurement, sec | 2 |
| Roughness of the tested surface, not more, Ra | 3,2 |
| Curvature radius of tested surface, not less, mm | 10 |
| Tested article weight, not less, kg | 3 |
| Tested article thickness, not less, mm | 12 |
| Depth of penetration into tested article, average, mm | 0,3 |
| Probe operating life (minimum number of measurements) | 50000 |
| Minimum diameter of the place where probe is installed, mm | 15 |
| Size of indent on the tested surface (diameter), mm | 0,7 |
Range of testing and error
| Hardness scale | Measurement range | Error, not more |
|---|---|---|
| On Rockwell C scale | (20-70) HRC | 1,5 HRC |
| On Brinell scale | (75-650) ÍÂ | 10 ÍÂ |
| On Vickers scale | (75-1000) HV | 12 HV |
| On Shore scale | (23-102) HSD | 2 HSD |
| Tensile strength, Rm | (378-1736 MPa) | 5 % |