Easy to use 456 coating thickness of 1 to boot. 2. Press the "Calibration" button (leftmost), select "calibration method" in the menu → "Rough / two" instrument gauge, press the "Select" button, the meter prompts "recalibrate it now?", Press " Yes "to start the calibration. "Calibration pace 1: the probe on the thick calibration sheet or press Next" appears on the display 3. According to this prompt gage probe on the thicker calibration sheet (eg 125um membrane), and by ↑ or ↓ to adjust the value to the diaphragm calibrated value. Then press "Set." 3. The display appears on "Calibration step 2: the probe calibration on the thin sheet or press Next", according to this prompt water gauge, the thinner the probe on a calibration sheet (such as 25um diaphragm), and Calibration of the numerical value to the diaphragm by ↑ or ↓ to adjust. 4. At this point calibration is complete, the instrument will prompt "test", a test with a known thickness of the diaphragm, if indication error to less than 3%. If the error is larger turbo gauge, you can re-calibrate. Hard steel Webster Hardness Tester shaped indenter, in the standard spring force pressed into the surface of the test sample, using pressure pressure needle penetration depth to determine material hardness, definition of 0.01mm indentation depth of a Vickers hardness unit . Webster hardness units as HW. Webster hardness tester uses aluminum alloy Webster hardness tester for measuring the hardness value products Webster Webster Hardness characteristics Webster hardness tester is a small portable instrument, its small size, light weight, one-handed operation for fast, convenient, non-destructive testing material hardness, it does not have to sampling, on operating skills do not ask, well suited to the material at the production site for rapid hardness testing. Webster Hardness drawback is poor sensitivity, range is narrow, only 20 full-scale calibration, it is often one instrument can only test 1 to 2 kinds of metal materials. Turbo gauge, gage, Jinke instrument provided by the Qingdao Branch of the Instrument Co., Ltd. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) strong, credible, in Qingdao, Shandong analytical instruments industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinke instrument into the brilliant and you work for a better future!