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TOPTES TS-501B Questions & Answers

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1 Questions
  • User Non avatarDI9 months ago

    why does the indicator screen always go to UL

  • User Non avatar #140559 United States9 months ago

    The TS-501B has a measurement range of 30 to 130 decibels (dB). When the measured sound level falls below 30dB, the screen will display the symbol "UL".