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- Page 1 MN ISHW www.insize.com ISHW WEBSTER HARDNESS TESTER OPERATION MANUAL...
- Page 2 The oxide film of 10μm can affect the test result by up to 0.5~1HW. The painting on the workpiece must be removed before testing. Slow force application will result in a slightly lower reading. Use the calibration sheath with the ISHW-L20A tester when testing on thin workpiece and test block.
- Page 3 Note: Do not calibrate the readings of the test block by regulating the adjustment screw. Technical specification Changing the indenter Code ISHW-L20 ISHW-L20A ISHW-L20B for aluminum for aluminum alloy for aluminum In case the reading can not be set to the full scale of 20 by regulating...
- Page 4 Indenters mode point for the tester. Before calibration of the ISHW-L20A, put the calibrating sheath on the anvil first. The Webster hardness tester have different mode of indenters.
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