Digital Metal Caliper Stainless Steel Vernier Calipers Electronic Micrometer Ruler Depth Measuring Tool Gauge Instrument

DIY Supplies : ELECTRICAL Measurement Range : 0-150mm Description: Electronic Digital Caliper offers instant and accurate readings of inside, outside, step, and depth measurements with accuracy of 0.01mm. mm/inch conversion switch automatically converts measurements to inches or millimeters with the simple press of a button. Adjustable thumbscrew provides tension for optimal movement of the slide and locks the jaws of the caliper in place. Features:mm/inch conversion switchZero calibration switchAutomatic On / OffEasy-to-readLCD displayDurable stainless steel constructionMeasurement range: 0-150mmMeasurement unit: MM,INCHBattery:1.5v LR44 (not included)Package Content:1 x caliper (No including the battery) Battery   not  included  1.5V battery (LR44) Digital confusion - There are three main reasons:A. The surface of the protective film is damp or stained with cutting fluid (or other conductive particles).Treatment: Wipe the surface of the ruler and the protective film with a dry cloth slightly dampened with absolute ethanol or aviation gasoline. Gently twist a small drop of absolute ethanol or aviation gasoline (be careful not to drip too much, otherwise the liquid will enter the electronic components causing other problems!)B.  The copper clad plate under the protective film is affected by corrosion and blackening.Treatment method: Uncover the protective film, polish the surface of the copper strip with high-grade rubber or metallographic sandpaper, and clean it.C, The battery is not enough - treatment: replace a  new  battery.Can not open  dispute  in  this   case