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DET5/4R & DET5/4D
Digital Earth Testers

USER GUIDE

GUIDE DE L’UTILISATEUR

GEBRAUCHSANLEITUNG

GUÍA DEL USUARIO

Содержание DET5/4D

Страница 1: ...M DET5 4R DET5 4D Digital Earth Testers USER GUIDE GUIDE DE L UTILISATEUR GEBRAUCHSANLEITUNG GU A DEL USUARIO...

Страница 2: ...er gloves and shoes should be worn The DET5 4D must be disconnected from any external circuit while its battery cells are changed Replacement fuses must be of the correct type and rating Before chargi...

Страница 3: ...6 The Slope method 18 Method using Dead earth 21 BS7671 16th Edition IEE Wiring Regulations Requirements 22 Other methods 22 Determining Touch potential 23 Determining Step potential 24 Measuring soil...

Страница 4: ...15 Test spike positions for BS7671 16th Edition IEE Wiring Regulations 22 Fig 16 Determining Touch potential 23 Fig 17 Determining Step potential 24 Fig 18 Soil resistivity measurement 26 Fig 19 Resi...

Страница 5: ...tested The potential developed across the earth is compared with the current and after filtering and phase sensitive detection the resistance is given directly on the digital display Test frequency is...

Страница 6: ...Wiring Regulations IEC 364 NFC 15 100 French Specification and VDE 0413 Part 7 1982 German specification The terminal C1 E is for the Current connection to the earth electrode to be tested The termin...

Страница 7: ...a greater depth rather than increasing the cost by having to add further electrodes and associated cables in order to obtain a specified total earth system resistance EARTHING SYSTEMS MAINTENANCE Afte...

Страница 8: ...terminal test To electrode under test 4 terminal test Battery compartment and charger socket cover DET5 4R Condition Warning l e d s 3 terminal push button Low Battery indicator point and k range indi...

Страница 9: ...he earth electrode test spikes test leads or their terminations if any Live earths may be encountered It is recommended that they wear appropriate rubber gloves rubber soled shoes and stand on a rubbe...

Страница 10: ...lly charged before embarking on a test sequence It can be extremely inconvenient if the battery becomes too low while a field test is in progress Similarly with the DET5 4D new batteries should always...

Страница 11: ...anied by the warning alert indicator on the display This may be caused by an open circuit poor test lead connections or excessive resistance of the soil near the electrode under test and or the remote...

Страница 12: ...id reading ensure that the P1 electrode is closer to C1 than the P2 electrode Fig 6 Reverse Polarity Indication SETTING UP THE TEST SPIKES ETC For earth electrode testing and for earth resistivity sur...

Страница 13: ...he earth resistance and Current loop resistance If the Current spike resistance is too high for the required measurement range the instrument will autorange up to a lower current range which can toler...

Страница 14: ...ld in place the protective panel covering the mains socket The supply voltage selection is by reversing the position of the fuse holder in the mains socket When the fuse and voltage selector are corre...

Страница 15: ...ect of mutual inductance Firmly connect the C1 and the P1 instrument terminals to the earth electrode The diagram of Fig 7 shows the connections Operate the instrument as explained in the Basic Test P...

Страница 16: ...nts This procedure is not of course necessary if the C1 and P1 terminals are connected by separate test leads Fig 8 Fall of Potential method using a single lead to the earth electrode THE 61 8 RULE To...

Страница 17: ...of a single rod or plate etc and on medium systems with several rods The diagram of Fig 10 shows the connections for the 61 8 Rule Fig 10 The 61 8 Rule method For most purposes the Current spike shoul...

Страница 18: ...sfactory and generally yields results of greater accuracy than those methods The equipment is set up as shown in Fig 11 The remote Current spike is placed 50 metres or more from the earth electrode sy...

Страница 19: ...R1 which is a measure of the change of slope of the earth resistance curve From the table on page 35 obtain the value of Pt Ec for this value of Pt is the distance to the Potential electrode at the po...

Страница 20: ...ances chosen for EC in tests 1 and 2 were not large enough and that those chosen in tests 3 and 4 were preferable because they would give the more correct value of the earth resistance iii It is unrea...

Страница 21: ...Using a shorting bar supplied short together terminals P2 and C2 2 Firmly connect a test lead to C1 and the other test lead to P2 and C2 3 Firmly connect the free ends of the test leads together as sh...

Страница 22: ...5 then the current spike should be moved further away from the electrodes and the tests repeated Fig 15 Test spike positions for BS7671 testing Other Methods There are other methods of earth electrod...

Страница 23: ...rimeter fence adjacent to the point where a person might stand 5 Press the 4 pole test push and take a reading in the normal way This is the effective resistance between the point of test on the fence...

Страница 24: ...respectively A is nearest to the substation earth 4 Press the 4 pole test push and take a reading in the normal way Record the resistance indicated This is the effective resistance across the positio...

Страница 25: ...of the soil resistivity of the surrounding site This will enable decisions to be made on the best position for the electrode s and to decide whether any advantage can be gained by driving rods to a gr...

Страница 26: ...ne If both the spacing a and the depth a 20 are maintained a directly comparable reading will be obtained each time and thus regions of lowest resistivity can be located over a given area at the const...

Страница 27: ...la 2 aR where R is the resistance measured in ohms a is the test spike spacing in metres and is the resistivity in ohm metres For non homogeneous soils the formula will give an apparent resistivity wh...

Страница 28: ...t as low as possible 1 Using a shorting bar supplied short together terminals P2 and C2 2 Firmly connect a test lead to C1 and the other test lead to P2 and C2 3 Firmly connect the free ends of the te...

Страница 29: ...ange The instrument measuring circuitry is connected to terminals P1 and P2 The voltage limiter and input buffer prevent damage to the instrument and loading of the resistance under test Synchronous f...

Страница 30: ...1 mA a c r m s 2 k and 20 k ranges 100 A a c r m s Test current short circuit current is constant throughout a range Interference Interference voltages of 40 V pk to pk at 50 Hz 60 Hz 200 Hz or 162 3...

Страница 31: ...the maximum error will not exceed 2 Max Output Voltage 50 V Display 31 2 digit l c d maximum reading 1999 Instrument Protection IP54 Temperature Effect 0 1 C over the temperature range 15 C to 55 C T...

Страница 32: ...Internal 100 mA ceramic HBC 20 mm x 5 mm IEC 127 1 for current source protection Internal 100 mA ceramic HBC 20 mm x 5 mm IEC 127 1 for Potential circuit protection DET5 4R Internal 100 mA ceramic HBC...

Страница 33: ...m value which the instrument must indicate in certain conditions An earth test being performed on any electrode system would normally be carried out to a particular specification Therefore even at the...

Страница 34: ...Earth 6210 161 Testing kit Compact carrying bag containing 4 x push in spikes 3m 15m 30 and 50m of cable on cable tidy Three Terminal Compact Earth 6210 160 Testing Kit Compact carrying bag containin...

Страница 35: ...8 0 6279 0 6277 0 6276 0 6274 0 51 0 6273 0 6271 0 627 0 6268 0 6267 0 6266 0 6264 0 6263 0 6261 0 626 0 52 0 6258 0 6257 0 6255 0 6254 0 6252 0 6251 0 6249 0 6248 0 6246 0 6245 0 53 0 6243 0 6242 0 6...

Страница 36: ...0 5889 0 5887 0 5885 0 5883 0 5882 0 588 0 5878 0 5876 0 5875 0 76 0 5873 0 5871 0 587 0 5868 0 5866 0 5864 0 5863 0 5861 0 5859 0 5857 0 77 0 5856 0 5854 0 5852 0 585 0 5849 0 5847 0 5845 0 5843 0 58...

Страница 37: ...386 0 5384 0 5382 0 538 0 5378 0 5375 1 02 0 5373 0 5371 0 5369 0 5367 0 5365 0 5362 0 536 0 5358 0 5356 0 5354 1 03 0 5352 0 5349 0 5347 0 5345 0 5343 0 5341 0 5338 0 5336 0 5334 0 5332 1 04 0 533 0...

Страница 38: ...741 0 4738 0 4735 0 4732 0 4729 0 4726 0 4723 0 472 0 4717 1 28 0 4714 0 4711 0 4707 0 4704 0 4701 0 4698 0 4695 0 4692 0 4689 0 4686 1 29 0 4683 0 468 0 4677 0 4674 0 4671 0 4668 0 4664 0 4661 0 4658...

Страница 39: ...3916 0 3912 0 3907 0 3902 0 3897 0 3893 1 50 0 3888 0 3883 0 3878 0 3874 0 3869 0 3864 0 3859 0 3855 0 385 0 3845 1 51 0 384 0 3835 0 383 0 3825 0 3821 0 3816 0 3811 0 3806 0 3801 0 3796 1 52 0 3791 0...

Страница 40: ...Archcliffe Road Dover Kent CT17 9EN Tel 44 0 1304 502100 England Fax 44 0 1304 207342 or Megger Valley Forge Corporate Center 2621 Van Buren Avenue Norristown PA 19403 Tel 1 610 676 8500 U S A Fax 1...

Страница 41: ...41...

Страница 42: ...caoutchouc D brancher le DET5 4D d un circuit externe quel qu il soit pendant le rechargement des piles S assurer que les fusibles de rechange sont du type pr vu et ont un pouvoir de coupure correct A...

Страница 43: ...ation secteur ou risque de le faire en pr sence d une anomalie 1 Toutes les personnes travaillant sur ce dispositif doivent avoir re u la formation n cessaire et doivent conna tre les proc dures d iso...

Страница 44: ...ise l appareil DET5 4 s lectionne automatiquement la plage qui lui permet de tol rer cette r sistance plus lev e de la sonde de courant Cependant cela entra ne une perte de r solution 3 Si les conditi...

Страница 45: ...dier avant que le r sultat fourni lors d un test puisse tre consid r comme valide Pour r soudre ce probl me il est possible de verser de l eau sur le sol proximit de la sonde de courant de d placer c...

Страница 46: ...maintenant en ligne droite avant de recommencer ces essais Inversion de Polarite Lorsque les conducteurs de potentiel sont invers s par rapport aux conducteurs de courant l cran clignote entre les bar...

Страница 47: ...ccepter la valeur affich e Cet instrument s lectionne automatiquement la plage de r sistances de mises la terre et la plage de r sistances de la boucle de courant Si la r sistance de la sonde de coura...

Страница 48: ...t Pour ne pas risquer d endommager cette batterie il ne faut pas attendre qu elle soit compl tement plat Attention avant de recharger la batterie proc der aux v rifications suivantes Un fusible pouvoi...

Страница 49: ...ger l instrument MISE EN PLACE OU REMPLACEMENT DE PILES DET5 4D Attention utiliser uniquement des piles de type correct piles alcalines CEI LR6 Attention avant de mettre en place ou de remplacer des p...

Страница 50: ...Trousse d essai compacte de mise la terre quatre bornes 6210 161 Compose d un sac de transport contenant 4 sondes enfichables en acier galvanis de 10 mm de diam tre sur 450 mm de longueur quatre c bl...

Страница 51: ...eparation d instruments ont t agr es pour faire des op rations de r paration sur la plupart des instruments Megger utilisant des pi ces d origine Megger Consultez le distributeur d sign agent officiel...

Страница 52: ...ndschuhe und Gummischuhe getragen werden Beim Aufladen der Batteriezellen mu das DET5 4D von externen Stromkreisen getrennt sein Es m ssen Ersatzsicherungen der richtigen Nennleistung installiert werd...

Страница 53: ...Me leitungen oder deren Abschlu widerst nde nicht zu ber hren wenn irgendwelche spannungsf hrenden Erdungsleitungen auftreten sollten Es wird empfohlen die entsprechenden Gummihandschuhe und Schuhe mi...

Страница 54: ...fung zufriedenstellend sind stabilisiert sich die Leuchtanzeige und die angezeigten Werte k nnen akzeptiert werden 4 Es empfiehlt sich beim Arbeiten mit dem DET5 4R vor Beginn einer Pr fsequenz darau...

Страница 55: ...r fstab f r Hochspannungswiderstand Rp Um anzuzeigen da der Widerstand des Stromkreises zu hoch f r eine genaue Messung ist leuchtet automatisch die Rp Leuchtanzeige zusammen mit der Warnanzeige der B...

Страница 56: ...ein g ltiges Ergebnis erzielen zu k nnen mu darauf geachtet werden da sich die P1 Elektrode n her bei der C1 als bei der P2 Elektrode befindet Fig 5 Anzeige f r Polarit tsumkehrung Einrchtung Der Pr...

Страница 57: ...chten mu die Ursache f r den jeweiligen Umstand beseitigt werden bevor der angezeigte Wert akzeptiert werden kann Das Instrument reagiert automatisch sowohl auf den Erdungs als auch auf den Stromschle...

Страница 58: ...r die Batteriekapazit t auf der Bildanzeige erscheint Falls die Bildanzeige beim Betrieb des Instruments leer bleibt k nnte dies daran liegen da die Batterie vollkommen ersch pft ist Bitte vermeiden...

Страница 59: ...er ein EINSETZEN ODER AUSWECHSELN DER BATTERIEN DET5 4D Achtung Verwenden Sie nur Batterien des richtigen Typs Alkali IEC LR6 Vorsicht W hrend des Einsetzens oder Auswechselns von Batterien sollten ke...

Страница 60: ...bidungskabel auf Aufwickelvorrichtungen Kompakter Erdungspr fkasten mit 4 Anschl ssen 6210 161 bestehend aus einer Tragetasche inklusive 4 versenkbare Pr fstabe aus galvanisiertem Stahl 10 mm Durchmes...

Страница 61: ...Road Dover Kent CT17 9EN Tel 44 0 1304 502243 England Fax 44 0 1304 207342 oder Megger Valley Forge Corporate Center 2621 Van Buren Avenue Norristown PA 19403 Tel 1 610 676 8500 U S A Fax 1 215 676 8...

Страница 62: ...cho Siempre que vaya a sustituir las pilas del probador DET5 4D primero descon ctelo del circuito externo Los fusibles de recambio deben ser del mismo tipo y amperaje Cuando vaya a cambiar la pila del...

Страница 63: ...imientos de aislamiento y de seguridad del sistema en que est n trabajando Estas personas deben tener en claro que donde exista la posibilidad de encontrar instalaciones de tierra bajo tensi n no se d...

Страница 64: ...falsas Nota si la resistencia de la pica de corriente es demasiado alta para el rango de medici n requerido el probador DET5 4 selecciona autom ticamente un rango que pueda tolerar una mayor resistenc...

Страница 65: ...talla La causa de esta condici n puede ser un circuito abierto una conexi n mala entre los cables de prueba o la resistencia excesiva en el rea cercana al electrodo bajo prueba o en la pica de corrien...

Страница 66: ...de tal forma que queden en ngulo recto con respecto a su primera posici n y en l nea recta Una vez corregido el problema vuelva a ejecutar la prueba POLARIDAD INVERTIDA Si la polaridad de los cables...

Страница 67: ...que si se indica una condici n adversa sta debe corregirse para que la lectura sea v lida El instrumento determina autom ticamente los rangos de la resistencia de tierra y la del ciclo de corriente Si...

Страница 68: ...aparezca el s mbolo que denota una condici n de carga baja Si la pantalla del instrumento queda en blanco mientras est en funcionamiento la causa m s probable es una condici n de descarga total de la...

Страница 69: ...imentaci n del instrumento INSTALACI N O REEMPLAZO DE LAS PILAS DET5 3D Precauci n Utilice nicamente pilas alcalinas IEC LR6 Precauci n Antes de instalar o sustituir las pilas aseg rese de que todas l...

Страница 70: ...ompacto de la prueba de tierra de 4 terminales Bolsa que contiene 4 picas de hincadura de acero galvanizado de 10 mm de di metro x 450 mm de longitud cables de 3 15 30 y 50 m con terminaci n en forma...

Страница 71: ...avor con Megger Limited Archcliffe Road Dover Kent CT17 9EN Tel 44 0 1304 502243 England Fax 44 0 1304 207342 o Megger Valley Forge Corporate Center 2621 Van Buren Avenue Norristown PA 19403 Tel 1 610...

Страница 72: ...APPES France T 33 0 1 30 16 08 90 F 33 0 1 34 61 23 77 OTHER TECHNICAL SALES OFFICES Toronto CANADA Sydney AUSTRALIA Madrid SPAIN Mumbai INDIA and the Kingdom of BAHRAIN Megger products are distribute...

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