Thiết bị kiểm tra vòng đeo tay chống tĩnh điện Waterun 498
 Can be used anywhere to quickly and easily check grounding systems, such as wrist straps and grounding wire.
→ Touching the mat with your hand when grounding wire is connected.
→ The green "Good" indicator will be on and buzzing when you have a safe grounding system.
    
        
            | Indication | 
            Standard Impedance | 
            Sound | 
        
        
            Low (red) 
             | 
            R < 800KΩ 
             | 
            No 
             | 
        
        
            | Good (green) | 
            800KΩ ≤ R ≤ 9MΩ | 
            Yes 
             | 
        
        
            | High (red) | 
            R > 9MΩ 
             | 
            No 
             
             |