LRM 200

True DC Micro Ohmmeter

The LRM 200 is a microprocessor-based, true DC micro ohmmeter designed to test the contact resistance of circuit breaker contacts, switchgear, and bus bar joints. It is the instrument every test technician needs to have to maintain circuit breakers, switch gear and busbars. The LRM 200 is designed to meet the IEEE C37.09-1999, IEC62271-100 for GIS factory test and IEC62271-200 for high voltage switchboard factory test for testing circuit breaker contact resistance.

The LRM 200’s wide measuring range is 1 micro Ohm to 5 Ohms with 0.1 micro ohm resolution with a  current range of 10 A to 200 A.

The LRM 200  injects a true DC current through the contacts under test and measures the contact resistance. It can compare the test results against the prescribed limit and make the pass/fail decision. As the rise and  fall time is configurable for each test, no transients are induced in the associated apparatus such as current transformers. This avoids  tripping of the relays. The LRM 200 is a  lightweight (15 Lbs/7.5 kgs) instrument designed for portability and field use.

Dual Ground Connections

  • Outstanding Features
  • Technical Specifications
  • Downloads
  • Selectable rise and fall time of the true DC current eliminates the mal-operation of connected relays to the current transformer
  • “Fast Test” mode to check multiple contact joints in the current circuit, improving productivity
  • Full-size keyboard, color display and built-in thermal printer with user friendly interface for efficient and quick testing
  • Internal Storage of 150 test records with 75 readings each, along with nameplate details, eliminating the need for a computer
  • Ability to export test results to PDF and Excel format

Physical SpecificationsDimensions: 18”W x 7”H x 15” D (45.7 cm x 17.8 cm x 38.1 cm)
Weight: 19.8 lbs. (8.9 Kg)
Resistance Reading Range1 micro-ohm to 5 ohms (max 10 milliohms @ 200A and 5 ohms @ 1A)
Test Current Range1A ¬ 200A (selectable in 1A steps)
Resolution0.1 µΩ - 999.9 µΩ: 0.1 µΩ
1.000 mΩ - 9.999 mΩ: 1 µΩ
10.00 mΩ - 99.99 mΩ: 10 µΩ
100.0 mΩ - 999.9 mΩ: 0.1 mΩ
Typical Accuracy±(0.15% of reading + 0.15% FS) at test current of 10-200 A
User InterfaceScreen: Back-lit LCD color screen (800 x 480 pixels) viewable in bright sunlight and low-light
Keypad: 44-key "QWERTY" back-lit keypad
Printer: Built-in 2.5” thermal printer
Computer InterfacesOne USB PC interface
One USB flash drive interface
PC SoftwareWindows®-based analysis software is included
Internal Test Record Storage150 test records; each record can contain up to 75 readings
Input Power100 - 240 Vac, 50/60 Hz
TemperatureOperating: -10°C to +50°C (+15°F to +122°F)
Storage: -30°C to +70°C (-22°F to +158°F)
Humidity90% RH @ 40°C (104°F) non-condensing
Altitude2,000 m (6,562 ft) to full safety specifications
Included Cables33 ft (10 m), #1 AWG test cables, power cord, ground cable, USB cable
SafetyDesigned to meet IEC 61010 (1995), UL 61010-a, and CAS-C22.2 standards
OptionsShipping case, 15 ft (4.57 m) test cables, hand spike set, dual ground option
WarrantyOne year on parts and labor

Contact Us

Please enter your name

Please enter your company name (optional)

Please enter your email address

Please enter your phone number (optional)

Please enter your message

pdic logo

India Service Center
401 Labh Complex
Opp Pramukh swami hospital
Atladra , Vadodara 390012
Phone: 8511115755

USA Headquarters
5010 E. Shea Blvd.
Suite 145
Scottsdale, AZ 85254
Phone: +1-602-732-1099

© 2018 Power Diagnostic Instruments Company.
All rights Reserved.