... on line and lead accumulator factory inspection can be tested by AT520 series. AT520L Battery Tester SPECIFICATIONSParametersAC resistance, ... record, NG-LO, GD-IN, NG-HI display and output. beep is adjustableTriggerInternal, manual, external (optional)InterfaceRS232C ... technical team, Applent focus on designing, researching and developing, manufacturing and selling all kinds of electrical meters, such ...