1 / 12

Earth and Resistivity Testers

Earth and Resistivity Testers. C.A 6460 & C.A 6462. SALES PRODUCT INFORMATION Electrical Testing and Safety Cécile Le Goué. Mains characteristics. 4 Resistance (automatic range selection) 4 Measurement frequency : 128 Hz 4 Open circuit voltage : £ 42V peak

radwan
Download Presentation

Earth and Resistivity Testers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Earth and Resistivity Testers • C.A 6460 & C.A 6462 SALES PRODUCT INFORMATION Electrical Testing and Safety Cécile Le Goué

  2. Mains characteristics • 4 Resistance (automatic range selection) • 4 Measurement frequency : 128 Hz • 4 Open circuit voltage : £ 42V peak • 4 Voltage detection from 20 to 250V AC (between H &E or E&S) • 4 Auxiliary rodresistance: • Voltage circuit resistance : max 50kW • Current circuit resistance : max 50kW Measurement range Resolution Test current Accuracy Open circuit voltage W W £ 10 mA ± 2%R + 1 ct 0,00…19,99 0,01 42 V peak W W £ 1 mA ± 2%R + 1 ct 20,0…199,9 0,1 42 V peak W W £ 0,1 mA ± 2%R + 3 cts 200…1999 1 42 V peak

  3. A special built-for-field design Very robust case, waterproof IP67 closed et IP53 opened A folding handle A folding cover

  4. A complete front panel... C.A 6462: Mains supply socket with dust cover and charge indicator Large backlit LCD display Fuse holder 4 connecting terminals and capture bar Momentary-control push-button 3 lights indicate events liable to impair results

  5. Strengths : Captive bar between S and ES for switching easily from 4-wire to 3-wire measurement method easy connection : terminals are colour-coded and correspond to the colour-coded accessory leads Rechargeable NiMH battery with internal charger (only C.A 6462) •  On-site case with cover for use in difficult conditions • Large backlit LCD display constantly lit for good readability as well as legibility •  3 indicators for measurement liability. •  Automatic selection of the measurement range and current for maximum accuracy.

  6. Applications •  "4-rod" resistivity measurement •  "3-rod" earth measurement : 62% method •  "3-rod" earth measurement : triangle method •  "4-rod" earth measurement : 62% or triangle methods •  "4-rod" coupling measurement

  7. "4-rod" resistivity measurement : Wenner method Goal : To choose the best location and shape of earthing rods and networks, before they are put in place. Method : to place the 4 spikes in line and equidistant from the distance a. The soil resistivity (W.m) at the depth h(3/4a) is :  2  a R R is the resistance read on the instrument

  8. "3-rod" earth measurement : 62% method Goal: check the existing earth resistance value Method : place the 2 auxiliary rods in line with existing earth rod so that : DE-S = 62% DE-H To validate the measurement, move the S rod at + 10% and - 10% : - if the result does not vary, the measurement is correct - if not, repeat measurements while increasing distances E-H and E-S.

  9. "3-rod" earth measurement : triangle method Goal : check the existing earth resistance value RE This method is used when it's not possible to place the rods in line : Place E, S and H in equilateral triangle. To validate the measurement, move the S rod from one side to the other one : - if the result does not vary, the measurement is correct - if not, repeat measurements while increasing distances.

  10. "4-rod" earth measurement : 62% or triangle methods Goal : check the existing earth resistance value RE Method : - connect E and ES with the earth to be measured - place the 2 others auxiliary rods so that : DE-S = 62% DE-H or in equilateral triangle. Follow the same validation procedure as for "3-rod" methods. The advantage of the 4-rods method is that frees itself from the resistance of the E(x) connected cords.

  11. "4-rod" coupling measurement Goal : to test the influence of one earth on another in the event, for example of lightning Method : - measure Rm and Rn with the 62% method - measure Rmn with the "4-wire" method explained opposite The coupling coefficient is : k = Rcoupling / Rm with Rcoupling = (Rm + Rn - Rmn ) / 2  EDF recommends k < 0.15

  12. TO ORDER  Earth and resistivity tester C.A 6460 P01.1265.01 delivered with batteries and user's manual in 5 languages  Earth and resistivity tester C.A 6462 P01.1265.02 delivered with a 2m European-type mains supply lead and a user's manual in 5 languages Replacements parts : European mains lead P01.2951.74 NiMH 9.6V/3.5AH storage battery P01.2960.21 HPC 0.1A fuses (pack of 10) P01.2970.12 1.5V alkaline LR14 battery (pack of 2) P01.2960.27 Accessories : STANDARD Earth / Resistivity kit P01.1018.23 PRESTIGE Earth / Resistivity kit P01.1018.25

More Related