Insize Automatic Digital Rockwell Hardness TesterHardness scale: HRA, HRB, HRC, HRD HRF, HRG (with standard indenters); HRE, HRH, HRK (with optional indenter). Preliminary test force 98N. Test force: 588N, 980N, 1471N. Stage elevation manual. Load control automatic (load/dwell/unload). Load dwell time 1~99 second. Resolution 0.1HR. Tolerance measurement with alarm. Set measurement times (2~9) to have average value and the difference of max. and min. value. Convert to HV or HB automatically. Memory of 1000 measurement values for browsing and output.Measurement value can be sent to wireless printer automatically. Calibration function compensates the measurement value for high accuracy. The hardness value of soft materials like plastic is not stable. The lock function can obtain the value automatically. Display unit is automatic power off.