Ensure the physical dial on the microscope cable or body is turned on (this also controls the LED brightness).
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Calibrate the software using a physical ruler to measure trace widths on PCBs or the size of micro-components. Ensure the physical dial on the microscope cable
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The DM-1000S is a manual focus microscope. Rotate the silver or black barrel on the body of the microscope to adjust focus. Ensure the plastic lens cap has been removed.