• Specifically designed for measuring contact resistances in circuit breakers, disconnecting switches, bus-bar joints, and other such devices
• Safer testing using the patented DualGround™ technology to test circuit breakers with both sides grounded
• Fully automatic testing- microprocessor controlled
• Wide measuring range and test currents
• High powered and light

The MJÖLNER Series is designed to measure the resistance of circuit breaker contacts, bus-bar joints, contact elements in bus-bars and other high-current links. This product has been designed with safety, ease of use and versatility in mind. It can be used anywhere to measure a low resistance value with high accuracy. It conducts true DC ripple free current testing of bus bars, circuit breakers, fuses, etc.

• Easy-to-use
• Automatic range settings
• MOM Win PC software

MOM690™ supplements our family of microhmmeters. In addition to high current capacity, MOM690™ features microprocessor-based measurement, storage and reporting. The built-in software enables you to carry out an individual test or an entire series of tests and store the results.

With the optional MOMWin™ software you can also export the

test results to a PC for further analysis and reporting. Ranges are set automatically, resistances are measured continually and test results can be automatically captured at a preset test current.

• Measures contact resistance in circuit breakers, disconnecting switches, busbar connections, safety devices, etc.
• Easy to operate
• Designed for rugged field use
• Highly flexible cable connections
• Portable and lightweight, weighs only 14 kg (31 lbs)

The MOM200A is designed to check and measure contact resistances in highvoltage circuit breakers, disconnecting switches (isolators) and busbar joints. This unit is an excellent choice when 200 amperes or less are needed for measurement.

• Measures contact resistance in circuit breakers, disconnecting switches, busbar connections, safety devices, etc.
• Easy to operate
• Designed for rugged field use
• Highly flexible cable connections
• Portable and lightweight, weighs only 14 kg (31 lbs)

The MOM200A is designed to check and measure contact resistances in highvoltage circuit breakers, disconnecting switches (isolators) and busbar joints. This unit is an excellent choice when 200 amperes or less are needed for measurement.

• Up to 220 A
• Battery powered
• Light weighs only 1 kg
• Safe test – DualGround™
• Auto range: 1 μΩ to 1000 mΩ
• Bluetoot® PC communication
• Complies with IEEE and IEC standards

The MOM2 is designed to measure the resistance of circuit breaker contacts, bus-bar joints and other high-current links. This product is designed with safety, ease of use and versatility in mind.

MOM2 uses an ultra capacitor to generate the high output current. The ultra capacitor is able to store a huge amount of energy compared to conventional capacitors and can deliver very high current during the discharge thanks to its very low internal resistance. The microhmmeter can be used anywhere to measure a low resistance value with high accuracy.

With MOM2 it is possible to make measurements according to the DualGround™ method. This means that the test object will be grounded on both sides throughout the test giving a safer, faster and easier workflow.

• Specifically designed for measuring contact resistances in circuit breakers, disconnecting switches, bus-bar joints, and other such devices
• Safer testing using the patented DualGround™ technology to test circuit breakers with both sides grounded
• Fully automatic testing- microprocessor controlled
• Wide measuring range and test currents
• High powered and light

The MJÖLNER Series is designed to measure the resistance of circuit breaker contacts, bus-bar joints, contact elements in bus-bars and other high-current links. This product has been designed with safety, ease of use and versatility in mind. It can be used anywhere to measure a low resistance value with high accuracy. It conducts true DC ripple free current testing of bus bars, circuit breakers, fuses, etc.

• Specifically designed for measuring contact resistances in circuit breakers, disconnecting switches, bus-bar joints, and other such devices
• Safer testing using the patented DualGround™ technology to test circuit breakers with both sides grounded
• Fully automatic testing- microprocessor controlled
• Wide measuring range and test currents
• High-Power and lightweight

The MJÖLNER Series is designed to measure the resistance of circuit breaker contacts, bus-bar joints, contact elements in bus-bars and other high-current links. This product has been designed with safety, ease of use and versatility in mind. It can be used anywhere to measure a low resistance value with high accuracy. It conducts true DC ripple free current testing of bus bars, circuit breakers, fuses, etc.

• Small and weighs less than 33 lbs (15 kg)
• Test currents from 10 A to 600 A dc
• 0.1 µohms best resolution
• On board memory for up to 300 test results and notes
• RS232 port to download stored results or for real time output to a printer
• Supplied complete with 16.4 ft (5 m) test leads and download software

Megger Ducter™ DLRO600 measures resistances between 0.1 µohms and 1 ohms, at high currents.

This versatile instrument can provide test currents from 10 amps up to 600 amps subject to the load resistance and supply voltage. A large liquid crystal display provides all the information needed to perform a test; all test parameters and measurement results are displayed.

The unique design allows the weight and size of DLRO600 to be kept to a minimum; the instrument weighs less than 5kg. This small size makes DLRO600 equally at home in the workshop, on the production floor or in the field. The high current capability and compact design make DLRO600 suitable for testing circuit breaker contacts, switch contacts, busbar joints or other applications where high current is needed.

History of ‘Ducter’ testing
For over 100 years the ‘Ducter test’ has been used to describe a simple test for measuring very low contact resistances and “Ducter”, which is still used as a trade mark, was the name originally given to the low resistance ohmmeter manufactured by Megger. The name Ducter was registered by Megger in June 1908 and ‘Ducter’ has since become the industry standard.

• Accurate results in under three seconds
• Auto current reversal cancels standing emfs
• Fuse protected to 600 V
• NiMH battery reduces weight
• 250 mW power limit (with optional override) to avoid heating the test sample
• Automatically detects continuity in potential and current connections
• Visible warning of high voltages present at the terminals
• Visible warning of current flowing in the test sample
• Multiple operating modes including fully automatic
• Alpha-numeric keypad for entering test notes
• User setable high and low limits
• Autoranging with Manual option
• Printer output and memory

The MEGGER  DUCTER™ DLRO10X bring new standards to low resistance measurement. It is a fully automatic instrument, selecting the most suitable test current, up to 10 A dc to measure resistance from 0.1 µΩ to 2000 Ω on one of seven ranges. For users who desire more control over the measurement process, DLRO 10X uses a menu system controlled by a two-axis paddle to allow manual selection of the test current. DLRO10X also adds real-time download of results and on-board storage for later download to a PC.

Both instruments are built into a strong, lightweight case that is equally at home in the field or in the laboratory. Light enough to be worn around the neck, they are small enough to be taken into areas which were previously too small to access. DLRO 10 uses a large, bright 4-1/2-digit LED display while DLRO 10X has a large, backlit LCD display.

History of ‘Ducter’ testing
For over 100 years the ‘Ducter test’ has been used to describe a simple test for measuring very low contact resistances and “Ducter”, which is still used as a trade mark, was the name originally given to the low resistance ohmmeter manufactured by Megger. The name Ducter was registered by Megger in June 1908 and ‘Ducter’ has since become the industry standard.