Measuring Tool Stainless Steel Digital Caliper 6 "150mm Vernier Calipers 

  • Brand Name: JIGONG
  • DIY Supplies: Metalworking
  • Measurement Range: 0-150mm
  • -0.165kg

  • Digital confusion - There are two 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. 
     
    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.
  • 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!)
 
C, The battery is not enough - treatment: replace a  new  battery.