Cathodic protection special grounding resistance / soil resistivity tester, grounding resistance measuring instrument 
 Type grounding resistance measuring instrument type of cathodic protection 
 Range sacrificial anode (MΩ) 
 A variety of devices can measure ground resistance of grounding resistance value measurable with four-side twisting the soil resistivity. 




 Product Category: Electrical safety testing and distribution systems analysis equipment - Power-parameter measuring device 
 Technical parameters: direct measurement of a variety of grounding device for grounding resistance, but also for the general low resistance measurement, four-terminal buttons (0 ~ 1 ~ 10 ~ 100Ω specifications) can measure the soil resistivity. 
 Description: 
 1. This product conforms to GB7676-98 Direct acting indicating analogue electrical measuring instruments and accessories definitions and general requirements and professional standards ZBN21012 grounding resistance of the relevant provisions of the table. 
 2. Meter baseline value range. 
 3. Instrument's basic error to reference values ??expressed as a percentage limit of the basic error range ± 3%. 4. Instrument operating ambient temperature -20 ~ +50 ℃. 
 5. Meter indication caused by temperature changes, changes are translated into each of the basic error of not more than 10 ℃. 
 6. Instrument operating humidity of 25% to 95%, indicating the resulting change in the value of not more than the basic error. 7. Meter horizontal working position. 
 8. Meter horizontal working position from either direction to tilt 5 °, indicating the value of the resulting changes in the basic error of not more than 1 / 2. 
 9. Instrumentation external magnetic field strength 0.4KA / m under the influence of the changes resulting indicated value is not greater than 1.5% of baseline value. 
 10. Meter line and the insulation resistance between the enclosure of not less than 20MΩ. 
 11. Instrument voltage test circuit and the shell is 500V. 
 12. Instrument protection performance for the splash-type shell. 
 13. Auxiliary grounding resistance probe needle to the next table from the 500Ω to change the set value, the basic error of change in the amount not exceeding the specified value in the following table. Auxiliary earth resistance (Ω) 0 1000 2000 5000 be allowed to change the amount (%) (accuracy class index percentage) 100 100 100 200 14. Instrument handle the rated speed of generator 120r/min