Quick Start EN under the effect of elastic force, and calculate the hardness value with the ratio of the rebound speed and impact speed of the punch at a distance of 1mm from the sample surface. The calculation formula is as follows: HL=1000 * VB/VA Where: HL - Leeb hardness value VB -- Rebound speed of impact body VA - Impact velocity of impact body The output signal of the impact device is shown in the following diagram: Fig. 4 Output signal of impact device Technical characteristics Table 41 Display error and repeatability This series of hardness tester meets the following standards 1. GB/T 17394. 1-2014 Leeb Hardness Test for Metallic Materials Part 1: Test Method 2. GB/T 17394.
2-2012 Leeb Hardness Test for Metallic Materials Part 2 : Verification and Calibration of Hardness Tester Copyright©Qingdao Hantek Electronics Co.,LTD HT360 series user manual 11 Hardness value of Serial Impact Indication Repeatability standard Leeb No device type error of indication hardness block 760±30HLD ±6 HLD 6 HLD 1 D 530±40HLD ±10 HLD 10 HLD 760±30HLDC ±6 HLDC 6 HLD 2 DC 530±40HLDC ±10 HLDC 10 HLD 878±30HLDL 3 DL ±12 HLDL 12 HLDL 736±40HLDL 766±30HLD+15 ±12 4 D+15 12 HLD+15 544±40HLD+15 HLD+15 590±40HLG 5 G ±12 HLG 12 HLG 500±40HLG 725±30HLE 6 E ±12 HLE 12 HLE 508±40HLE 822±30HLC 7 C ±12 HLC 12 HLC 590±40HLC