Method for using grounding resistance tester
The connection point between the grounding main line and the grounding body or the connection point of all the grounding branch lines on the grounding trunk is disconnected, so that the grounding body is independent from any connection and becomes an independent body.
Prepare work using ground resistance tester1) with grounding resistance measuring instrument for use, structure, performance and operation methods should be a comprehensive understanding of the instrument.2) prepare the necessary tools and all the accessories of the instrument, and wipe the instrument and the grounding probe, especially the ground probe. Make sure the surface affects the dirt and rust of the conductivity.
Use grounding resistance tester to measure step1) insert two grounding probes along the radiation direction of the grounding body into the ground of the ground body 20m and 40m respectively, and the insertion depth is 400mm, as shown in the following figure.Diagram of grounding resistance testGround resistance test using diagrams: a) actual operation b) equivalence principle2) place the grounding resistance measuring instrument horizontally near the grounding body and conduct wiring. The wiring method is as follows:Use the shortest special wire to connect the grounding body with the ground terminal of measuring instrument "E1" (three button measuring instrument) or the common end (four button measuring instrument) after short connection with C2.Using the longest special wire, the measuring probe (current probe) from the grounding body 40m is connected with the measuring button C1 of the measuring instrument.The special wire by the rest of the length of the center distance will be m, grounding measurement probe (potential probe) and measuring instrument wiring terminal "P1".
