Megger BT51 User manual

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Digital Milliohmmeter
BT51
USER GUIDE
GUIDE DE L’UTILISATEUR
GEBRAUCHSANLEITUNG
GUÍA DEL USUARIO

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Safety Warnings 2
General Description 4
Applications 5
Specification 6
Operation 7
Warning 7
The detachable lid 7
Performing a test 7
Using alternative leads 8
Charging the battery 8
Outline Diagram 9
Mode d’Emploi 10
Kurzanweisungen 11
Instrucciones Resumidas de Uso 12
Contents

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Specification
Ranges 2000 mΩresolution 1 mΩ
20,000 mΩresolution 0,01 mΩ
Test current 2 A to 2,5 A at any reading
Accuracy (0˚C to 50 ˚C) ± 1% ± 2 digits
Display 31⁄2 digit L.E.D.
Temperature Range Operating 0 ˚C to +50 ˚C
Storage –20 ˚C to +50 ˚C
Protection Relay protection for up to 240 V a.c. power source applied
240 V model 100 mA (T) fuse 20 mm x 5 mm ceramic (For charging circuit)
115 V model 250 mA (T) fuse 20 mm x 5 mm ceramic (For charging circuit)
Power Supply Internal 4 Ah NiCd rechargeable cells and charging unit.
Normal charging time at 240 V is 10 hours
Safety The instruments meet the requirements for double insulation
to IEC 61010-1.
E.M.C. In accordance with IEC 61326-1
Dimensions 344 mm (131⁄2ins) x 245 mm (95⁄8ins) x 158 mm (61⁄4ins)
Weight 4,5 kg (10 lb)
Cleaning Wipe disconnected instrument with a clean cloth dampened
with soapy water or Isopropyl Alcohol (IPA).
Operational uncertainties Refer to www.megger.com

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The instrument circuit contains static sensitive devices, and
care must be taken in handling the printed circuit board. If the
protection of an instrument has been impaired it should not be
used, and be sent for repair by suitably trained and qualified
personnel. The protection is likely to be impaired if, for
example, the instrument shows visible damage, fails to
perform the intended measurements, has been subjected to
prolonged storage under unfavourable conditions, or has been
exposed to severe transport stresses.
New Instruments are Guaranteed for 1 Year from the
Date of Purchase by the User.
Note: Any unauthorized prior repair or adjustment will
automatically invalidate the Warranty.
Instrument Repair and Spare Parts
For service requirements for Megger Instruments contact:
Megger Limited or Megger
Archcliffe Road Valley Forge Corporate Center
Dover 2621 Van Buren Avenue
Kent, CT17 9EN. Norristown, PA 19403
England. U.S.A.
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
or an approved repair company.
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.
Returning an Instrument for Repair
If returning an instrument to the manufacturer for repair, it
should be sent freight pre -paid to the appropriate address. A
copy of the Invoice and of the packing note should be sent
simultaneously by airmail to expedite clearance through
Customs. A repair estimate showing freight return and other
charges will be submitted to the sender, if required, before
work on the instrument commences.
Repair and Warranty

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Megger Limited
Archcliffe Road, Dover
Kent CT17 9EN England
T (0) 1 304 502101
F (0) 1 304 207342
Megger
4271 Bronze Way, Dallas, Texas
75237-1019 USA
T 1 800 723 2861
T 1 214 333 3201
F 1 214 331 7399
Megger
Z.A. Du Buisson de la Couldre
23 rue Eugène Henaff
78190 TRAPPES France
T 1 30.16.08.90
F 1 34.61.23.77
OTHER TECHNICAL SALES OFFICES
Toronto CANADA, Sydney AUSTRALIA, Mumbai India, Madrid SPAIN and the Kingdom of BAHRAIN.
Megger products are distributed in 146 countries worldwide.
This instrument is manufactured in the United Kingdom.
The company reserves the right to change the specification or design without prior notice.
Megger is a registered Trade mark of Megger Limited.
Copyright ©, Megger Limited.
Megger is a registered trademark
Part No. 6170-921 EDITION 17 Printed in England 1108
www.megger.com