- Ground resistance tester and loop resistance tester.
  - More safer and faster when test loop resistance system, No need to disconnect the ground wire and 
without auxiliary electrode.  - Short boot time, Self just 0.5 seconds, boot instantaneously.
  - Automatically identify Interference signal, automatic transmission.
  - Sound and light alarms, RS232 interface
  
 Main Specifications 
  - : 0.01-1200Ω 
  - Resistance Resolution: 0.001Ω 
  - Resistance Accuracy: ±1%±0.01Ω
  - Data memory : 99 Sets 
  - Alarm Threshold Setting Range Resistance: 1-199Ω 
  - Working Temperature and Humidity: -20°C-55°C; 20%RH-90%RH 
  - LCD Screen:  4 Digits LCD display;  Screen L×W: 47mm×28.5mm 
  - Clamp Size: 65mm×32mm
  - Clamp Opening: Extent 32mm 
  - Weight: 1160g (With batteries) 
  - Dimension : 285mm×85mm×56mm 
  
  Testing range and accuracy 
 
     | Measurement mode |  testing range |  resolution |  Accuracy |  
  | 0.010Ω-0.099Ω |   0.001Ω |  ±(1%+0.01Ω) |  
  | 0.10Ω-0.99Ω |  0.01Ω  |  ±(1%+0.01Ω) |  
  | 1.0Ω-49.9Ω |  0.1Ω  |  ±(1%+0.1Ω) |  
  | 50.0Ω-99.5Ω |  0.5Ω |  ±(1.5%+0.5Ω) |  
  | 100Ω-199Ω |  1Ω |  ±(2%+1Ω) |  
  |  200Ω-395Ω |  5Ω |  ±(5%+5Ω) |  
  |  400-590Ω  |  10Ω |  ±(10%+10Ω) |  
  | 600Ω-880Ω  |  20Ω |   ±(20%+20Ω) |  
  | 900Ω-1200Ω |  30Ω |   ±(25%+30Ω) |  
  | Current |  0.00mA -9.95mA  |  0.05mA |  ±(2.5%+1mA) |  
  | 10.0mA -99.0mA |   0.1mA |  ±(2.5%+5mA) |  
  | 100mA -300mA |  1mA |  ±(2.5%+10mA) |  
  |  0.30A-2.99A |  0.01A |  ±(2.5%+0.1A) |  
  | 3.0A-9.9A |  0.1A |  ±(2.5%+0.3A) |  
  | 10.0A-20.0A |  0.1 A |  ±(2.5%+0.5A) |  
  
   
Technical specifications
     | Resistance testing range |  0.01Ω-1200Ω |  
  | Resistance resolution |  0.001Ω |  
  | Current resolution |  0.05mA |  
  | Alarm Threshold Setting Range Resistance |  1-199Ω |  
  | Current |  1-499mA |  
  | Power |  6VDC(4 PCS of LR6 Alkaline batteries) |  
  | Working Temperature and Humidity |  -20ºC-55ºC;10%RH-90%RH |  
  | Display |   4 Digits LCD display;  Screen L×W: 47mm×28.5mm |  
  | Clamp Size |  65mm×32mm |  
  | Clamp Opening Size |   Extent 32mm |  
  | Weight |  1160g (With battery) |  
  | Dimension |  285mm×85mm×56mm |  
  | Explosion-proof mark |   Exia II BT3 Ga |  
  | Protection level |  Double insulation |  
  | Structural features |  Clamp CT |  
  | Shift |  Automatic gear shift |  
  | External magnetic, electric field |  < 40A/m;  < 1v/m |  
  | Single measurement time |  0.5 sec |  
  | Resistance measurement frequency |  > 1 KHz |  
  | Current frequency under test |  50/60Hz automaticly |  
  
 