Sew 4236 ER 四线接地电阻/电阻率测试仪

 Measuring ranges     
 Earth Resistance: 0-20Ω / 0-200Ω / 0-2kΩ
 Earth Voltage: 0-300.0V AC
 Earth Resistivity (ρ=2 × π × L × R): 
 0.06~6.28kΩ.m
 0.62~62.8kΩ.m
 6.28~628kΩ.m 
 Accuracy:
 Earth Resistance:  ±2%rdg ± 3dgt
 Earth Voltage:  ±2%rdg ± 3dgt
 Earth resistance resolution:
 0-20Ω : 0.01Ω
 0-200Ω : 0.1Ω
 0-2kΩ : 1Ω
Measuring system: Earth resistance by constant current Inverter 820Hz approx. 2mA
Optical USB to RS-232 data transmission. • 
The stored data can be transferred to a PC.
 Dimensions:  250(L) x 190(W) x 110(D)mm
 Weight: 1430g 
 Power source : 1.5V (AA) × 8 
Accessories: Test leads (red-15m, black-10m, yellow-10m green-5m), Auxiliary earth spike × 4, Instruction manual, Shoulder belt, Carrying case, Batteries, Data transmission cable CA-232
Compact disk (CD) for PC interface