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THE INSTRUMENT MUST ONLY BE USED BY TRAINED AND COMPETENT PERSONS
The MEGGER DET62D Digital Earth Tester is a compact portable instrument designed to
measure earth electrode resistance quickly and accurately. Powered by six LR6 battery
cells, the instrument is very robust and has a tough case moulded in ABS plastic.
The instrument uses the three-terminal method of measurement in which the 'X' terminal
is connected to the earth electrode under test, and the 'C' and 'P' terminals are connected
to Current and Potential test spikes. Test frequency is 128 Hz to avoid problems from electrical
mains 'Noise'.
Test leads and auxiliary electrode test spikes can be supplied as part of an earth testing
field accessory kit which is available as an option.
DIGITAL EARTH TESTER
MEGGER ® DET62D
User Guide
www.MeterCenter.com (800) 230-6008
SAFETY WARNINGS
Warnings and precautions must be read and
understood before the instrument is
used. They must be observed during use.
The earth spikes, test leads and their
terminations must not be touched if an
installation earth-fault can arise, unless
adequate precautions are taken.
The DET62D must be disconnected while
its battery cells are changed. Replacement
fuses must be of the correct type and rating.
Special precautions are necessary when
'live' earths may be encountered. Isolation
switches and fuses are needed in this
situation.
When working near high tension systems,
rubber gloves and shoes should be worn.
GENERAL DESCRIPTION.
NOTE
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Resumen de contenidos para Megger DET62D
- Página 1 THE INSTRUMENT MUST ONLY BE USED BY TRAINED AND COMPETENT PERSONS GENERAL DESCRIPTION. The MEGGER DET62D Digital Earth Tester is a compact portable instrument designed to measure earth electrode resistance quickly and accurately. Powered by six LR6 battery cells, the instrument is very robust and has a tough case moulded in ABS plastic.
- Página 2 DET62D FEATURES The 3 ⁄ digit liquid crystal display If the resistance under test exceeds 2 kΩ, shows all test resistance results an over-range symbol appears (‘1’ as left directly in Ω or kΩ, with the hand digit, with a decimal point)
- Página 3 APPLICATIONS The principal application of the DET62D is in the testing of single or small earth electrodes by the 3 terminal test technique. The instrument will directly measure the resistance to earth of an earth electrode, in the presence of electrical mains supply 'noise' in the soil, provided it is not excessive.
- Página 4 OPERATION LIVE EARTH SAFETY PRECAUTIONS It is preferable that the earth electrode to be tested is first isolated from the circuit it is protecting, so that only the earth is measured and not the complete system. When this is done, the circuits and equipment must be de-energised. If however this is not possible, the earth electrode should be duplicated so that when it is disconnected for test purposes, the other one provides the necessary circuit protection.
- Página 5 SPECIFICATION 199,9 Ω Earth Resistance Ranges: 00,0Ω 0,00kΩ 1,999 kΩ Accuracy (23°C ± 2°C): ±2% of reading ±3 digits. Total service error ±5% of reading ±3 digits Test Frequency: 128 Hz ± 0,5 Hz 200 Ω range Test Current: 1 mA a.c.(r.m.s.) (constant throughout a range) 2 kΩ...
- Página 6 FONCTIONNEMENT La méthode de “chute de potentiel” Il s’agit de la méthode fondamentale de mesure de la Zone optimale d'emplacement résistance des circuits à électrodes de mise à la terre. de la pointe de Potential. Elle est surtout utile sur les circuits à une ou deux électrodes de mise à...
- Página 7 Procédure d’essai pour chaque mesure Branchez les bornes de l’instrument sur l’électrode de mise à la terre et sur les pointes d’essai appropriées. Consultez la Section intitulée “Réglages initiaux de l’essai et branchements”. 1. Appuyez sur le bouton-poussoir. Maintenez la pression sur ce bouton. Cela permet de lancer la séquence d’essai et de mettre en oeuvre une surveillance de l’état du circuit et des “bruits”.
- Página 8 BETRIEB Das Spannungsabfallverfahren Dies ist das grundlegende Verfahren zum Messen des Widerstands von Erdelektrodensystemen. Es eignet sich am besten für Einzel- oder Doppelelektrodensysteme. Zur Erzielung eines zuverlässigen Meßergebnisses mit dem “Spannungsabfallverfahren” (Fall-of-Potential Method) muß der Stromspieß weit genug von der Erdelektrode entfernt sein.
- Página 9 Prüfverfahren für jede Messung Verbinden Sie die Anschlüsse des Meßinstruments mit den entsprechenden Erdelektroden und Prüfspießen. Vgl. “Einleitende Prüfanordnung und Verbindungen”. 1.Halten Sie die Drucktaste gedrückt. Dadurch wird der Prüfablauf eingeleitet, der Zustand des Schaltkreises überprüft und das “Rauschen” gemessen. 2.Überprüfen Sie die Leuchtanzeigen für den Schaltkreiszustand.
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Página 10: Funcionamiento
FUNCIONAMIENTO El método ‘Caída de Potencial’ Se trata del método básico para medir la resistencia de los sistemas de electrodos de masa. Es muy útil en pequeños sistemas de electrodos de masa sencillos o Zona de la posicion optima de la dobles. - Página 11 Procedimiento de prueba para cada medición Conecte los terminales del instrumento a los respectivos electrodos de masa y puntas de descarga de prueba. Véase ‘Preparación inicial de la prueba y conexiones’. 1. Pulse y mantenga apretado el botón pulsador. Esto pondrá en marcha la secuencia de prueba e incluirá las condiciones del circuito y la supervisión de ‘ruido’.
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Página 12: Repair And Warranty
APPROVED REPAIR COMPANIES A number of independent instrument repair companies have been approved for repair work on most MEGGER® instruments, using genuine MEGGER® spare parts. Consult the Appointed Distributor / Agent regarding spare parts, repair facilities and advice on the best course of action to take. If returning an instrument to the manufacturer for repair, it should be sent freight pre -paid to the appropriate address .