Wenner, A method of measuring earth resis- tivity; Bull. Page 54 Users Manual 1. Four earth spikes of the same length are positioned into the soil in an even line and with the same distance "a" to each other. Curve 3: With increasing depth E is not decreasing: a strip conductor elec- trode is advisable.
The measurement is done with AC voltage. To achieve highest accuracy 4 pole measurements are possible. To balance the extension lead, a compensation has to be done. Page Compensation Of Measuring Lead Resistance Users Manual W Warning Due to the high measuring current inductive loads can cause lethal induced voltages during disconnection from the measuring circuit.
First, "R1" with positive voltage is measured on jack "E". Press all 4 keys simultaneously and move central selector from OFF to the desired measuring mode. Note If the limit values required by regulations are changed incorrect, er- roneous test results may be displayed.
All consump- measured tion values edw Rotary Select cor- switch in rect posi- Before inter- tion. Measuring Check lead circuit of connection earth- and on earth probe elec- spikes LIMIT edw No reactions to button faulty con- Switch control etc. Avoid aggressive cleaning agents and solvents trilene, chlorothene etc. Service work must only be undertaken by trained qualified staff. In all repair work care must be taken that the design parameters of the instru- ment are not modified to the detriment of safety, that assembled parts corre- spond to the original spares and that they are reassembled properly factory state.
Page Recalibration in its original container if available and forward it, postage paid, to the nearest Fluke Service Center. Include a brief description of the problem. Fluke assumes NO responsibility for damage in transit. The use of ground stakes is not necessary.
Before this method was available, users were required to disconnect an indi- vidual ground path to be tested from other grounds to eliminate the influence of parallel ground paths. Page Specifications Specifications General: Adapter unit for use with ground testers in the mode: 3 pole Order No. EI All information contained in this section exclusively refers to this application.
Principle: Ground testing without using earth stakes for the probe and the auxiliary earth elec- trode. Measuring frequency: Hz. Page 74 Users Manual Equivalent diagram Source edw Rn is considerably lower than the ground connection under test R then is a reasonable approximation.
Settings on the Tester Refer to the Operation section in the Testers instruction manual. The rotary switch of the tester must be in the R 3 pole position. Page Description Of Displays Users Manual Description of Displays With stakeless ground testing some display combinations have certain signifi- cance.
Page 82 Appendix B Earthing Resistance Introduction Per definition, the earthing resistance consists of several individual resistances. The resistance of connecting lead to earth electrode 2. The resistance of the actual earth electrode; earthing rod, earthing plate, earthing strip, mesh earth electrode etc. Page 84 Users Manual Soil Resistivity The soil resistivity is the resistance measured between two opposing surfaces of a cube of homogenous soil material with a lateral length of 1 meter.
July Jan. U meas. Page 87 Earthing Resistance Principle of Operation The Potential Gradient Area Around every earth electrode a so called potential gradient area develops dur- ing the flow of an electric current see picture below.
This wire is not only ohmic. For calculation of the short circuit current this impedance at line frequency has to be determined. Page 90 Users Manual Print page 1 Print document 90 pages. Rename the bookmark. Delete bookmark? Cancel Delete. W arranty support is. Fluke reserves the right to invoice Buyer fo r importation costs of. Fluke's warranty obligation is li mited, at Fluke's option, to refund of the purchase price, free of charge repair,. To obtain warranty service, contact your nearest Fluke authorized service center to obtai n return.
If Fluke. Following repair, the product will be returned to. Since some countries or states do not allo w limitation of the term of an implied warranty, or exclusion or. If any provision of this Warrant y is held invalid or unenforceable by a court or other.
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