| TH170 | TH172 | TH174 |
Impact device | D integrated | C integrated | DL integrated |
Hardness scales | HLD, HB, HRC, HRB, HV, HS | HLC, HB,HRB,HRC, HV, HS | HLDL,HB, HRC, HRB, HV, HS |
Accuracy | ±6HLD(760 ±30HLD) | ±12HLC | ±12HLDL |
Memory | 270 average readings in 9 group files |
Output | USB2.0 to computer |
Average Surface Roughness of Work piece | 1.6μ ( Ra) | 0.4μ ( Ra) | 1.6μ ( Ra) Diameter = 2.8mm |
Max. Work piece Hardness | 900HLD | 960HLC | 950HLDL |
Min. radius of Work piece (convex/concave) | Rmin = 50mm (with support ring Rmin= 10mm) | Rmin = 11mm (with support rings) | Rmin = 10mm |
Min. Work piece weight | 2~5kg on stable support 0.05~2kg with compact coupling | 0.5~1.5kg on stable support 0.02~0.5kg with compact coupling | 2~5kg on stable support 0.05~2kg with compact coupling |
Min. Work piece thickness coupled | 5mm | 1mm | 5mm |
Min. Thickness of hardened layers | 0.8mm | 0.2mm | 0.8mm |
Indentation depth | Impact Devices data | Impact Devices data | Impact devices data |
Continuous working time | 150(without backlight) | 150(without backlight) | 150(without backlight) |
Power | AAA1.5V batteries(2PCS) | AAA1.5V batteries(2PCS) | AAA1.5V batteries(2PCS) |
Operating temperature | 0~40°C | 0~40°C | 0~40°C |
Overall dimensions | 155mm×55mm×25mm | 160mm×60mm×25mm | 215mm×60mm×25mm |
Weight | 166 g | 180g | 180g |