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Megger DLRO User Manual

Megger DLRO
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AVTM24-1J
Rev A
April 2006
Instruction Manual
DLRO
®
Digital Low Resistance Ohmmeters
Catalog No. 247000 Series
M
Valley Forge Corporate Center
2621 Van Buren Avenue
Norristown, PA 19403-2329
U.S.A.
610-676-8500
www.megger.com
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
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Megger DLRO Specifications

General IconGeneral
TypeDigital Low Resistance Ohmmeter
DisplayLCD
Power SupplyRechargeable battery or mains power
Power SourceBattery
InterfaceUSB
Safety RatingCAT IV 300 V
Operating Temperature50°C
Storage Temperature-20°C to 60°C
Test Current10 A, 1 A, 100 mA, 10 mA

Summary

1.0 10 Ampere Systems

Section B Safety Precautions

Essential safety information for operating the 10 Ampere DLRO instruments.

Safety

Confirms compliance with safety standards and voltage limits.

Section F Controls and Connections

Details the various controls and connection points on the DLRO instrument.

Battery Meter and Power Switch

Covers the battery test meter M1 and the ON/OFF switch S3 for instrument operation.

Terminals and Switches

Describes connection terminals (C1, P1, P2, C2), forward-reverse switch S2, and power connector J2.

Section G Operating Procedure

Step-by-step guide for operating the DLRO instrument.

Battery Check

Procedure for checking the state of charge of the instrument's rechargeable batteries.

Connections and Reading

Guidance on connecting the instrument and taking resistance readings.

Very Low Resistance

Techniques for accurate readings below 0.1 mO using forward/reverse readings.

Charging Batteries

Instructions for charging the instrument's rechargeable batteries.

Section H Applications

Describes typical applications for the DLRO instrument.

Section K Warranty and Repair

Details the product warranty and procedures for instrument repair and return.

2.0 100 Ampere System

Section B Safety

Safety precautions specific to the 100-Ampere current source and instrument operation.

Section D Operating Procedure

Operating procedures for the 100-Ampere DLRO range.

Measurements on 600µΩ (100-Ampere) DLRO Range

Procedure for taking measurements using the 100-Ampere DLRO range.

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