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Summary of Contents for Megger MOM200A
- Page 1 MOM200A/600A Microohmmeters User’s Manual ZP-BB04E...
- Page 2 NOTICE OF COPYRIGHT & PROPRIETARY RIGHTS © 2009, Megger Sweden AB. All rights reserved. The contents of this manual are the property of Megger Sweden AB. No part of this work may be reproduced or transmitted in any form or by any means, except as permitted in written license agreement with Megger Sweden AB.
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Page 3: Table Of Contents
............. 8 General ..............8 Symbols on the instrument ........8 Safety instructions ..........8 3 Control panels ............10 Control panel for MOM200A ......10 Control panel for MOM600A ......11 4 Operating instructions ............12 External measuring instrument....... 13 Troubleshooting ............. 13 5 Application examples ............ - Page 4 ZP-BB04E MOM200A/600A...
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Page 5: Introduction
To protect against external overvoltages, both the current output and the sensing input are decoupled to ground. MOM200A is used for currents up to 200 A. MOM600A can provide an output current of up to 600 A, and it can be set to six different measuring ranges. - Page 6 1 INTRODUCTION ZP-BB04E MOM200A/600A...
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Page 7: Safety
Do not use any accessories that are not inten- ded for use together with the instrument. Disconnect the instrument from the mains before cleaning. Use a damp cloth for cleaning. Do not use liquid cleaners or aerosol cleaners. MOM200A/600A ZP-BB04E... - Page 8 IEC 60227 or IEC 60245. Mains supply cables certified or approved by a recognized testing au- thority are regarded as meeting this requirement. Refer all servicing to authorized personnel. If you need to return the instrument, please use ZP-BB04E MOM200A/600A...
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Page 9: Control Panels
3 CONTROL PANELS Control panels Control panel for MOM200A ON/OFF switch Positive current output (I Mains inlet Sensing terminal (SENSE) LED, resistance Negative current output (I LED, current Resistance button (R) LED, thermal cut-out Current-shunt terminal (SHUNT) Resistance range switch... -
Page 10: Control Panel For Mom600A
Negative current output (I LED, thermal cut-out Resistance button (R) Miniature circuit breaker, 17 A Sensing current push buttons (F3, MOM600 115 V only) Current-shunt terminal (SHUNT) ON/OFF switch Miniature circuit breaker for mains (F1) Variable transformer Grounding terminal ZP-BB04E MOM200A/600A... -
Page 11: Operating Instructions
Keep the microohmmeter disconnected from to the current that you selected with the cur- the mains while making connections. rent range switch on MOM200A or the push Ground one side of the test object. buttons on MOM600A. Ground the microohmmeter. -
Page 12: External Measuring Instrument
(on model MOM600A) or milliohms (on model MOM200A). The current flowing through the test object is interrupted auto- matically, but the reading remains visible on the display. -
Page 13: Application Examples
Application examples Measuring resistance in a Connect the microohmmeter to the mains. Turn on the ON/OFF switch. breaker MOM200A: Select the desired current range (100 A for example) using the "Current range Important switch". Read the manual and comply with the... -
Page 14: Measuring Resistance At Bus-Bar Joints
Connect the microohmmeter to the mains. Turn on the ON/OFF switch. MOM200A: Select the desired current range (100 A for example) using the "Current range switch". MOM600A: Select the desired current range ZP-BB04E... -
Page 15: Expanded Measuring Range
To obtain the correct resistance reading you must multiply the displayed reading by a factor of X. To obtain X, divide the selected current range by the generated current. Example: 400/100 = 4. MOM200A/600A ZP-BB04E... - Page 16 5 APPLICATION ExAMPLES ZP-BB04E MOM200A/600A...
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Page 17: Specifications
6 SPECIFICATIONS Specifications Specifications MOM200A Specifications MOM600A Specifications are valid at nominal input voltage and an ambient Specifications are valid at nominal input voltage and an ambi- temperature of +25°C, (77°F). Specifications are subject to ent temperature of +25°C, (77°F). Specifications are subject to change without notice. - Page 18 Input cur- current output load time rent voltage time 100 A DC 8.3 V – – 300 A DC 7.2 V 2.5 min. 15 min. 16 A 600 A DC 5.6 V 15 s 5 min. 32 A ZP-BB04E MOM200A/600A...
- Page 19 Tachometers & Speed Measuring Instruments facilities in the USA, UK and Sweden, combined ▪ ▪ TDR Test Equipment with sales and technical support in most countries, Megger is uniquely placed to meet the needs of its ▪ Transformer Test Equipment ▪ customers worldwide. ▪...
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