This portable digital ohmmeter is a practical instrument for low resistance measurement, ideal for use in the workshop, field or test facilities. It is of rugged construction contained in an aluminium case with tilt handle.

The DO4A has many advanced features, including protection up to 415 volts rms, digital calibration and long scale length, 4,000 count. The rechargeable sealed lead acid battery means real portability with more than 14 hours continuous operation, without the problems normally associated with other battery types. Full measurement capability is maintained whilst charging.

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Micro Ohmmeter DO7

The DO7 digital micro ohmmeter is a practical instrument for low resistance measurement, ideal for utilities use in the workshop, field or test facilities. It is of rugged construction, contained in a sealed ABS plastic case with lid and carrying handle.

The DO7 digital micro ohmmeter has many advanced features. Rechargeable batteries means real portability with more than 1 hour of continuous operation on the lowest ranges(10A), and 20 hours on all others. The internal charger will boost charge to 90% of full charge, switching automatically to a trickle maintenance charge. Warning LEDs illuminate when an open circuit lead condition is detected.

Micro Ohmmeter Features DO7:

• True 4 terminal measurement eliminates lead resistance errors
• 10A measuring current
• Rechargeable batteries with built-in charger
• Measuring ranges 600µΩ to 60Ω
• Resolution 0.1µΩ on 600µΩ range
•  0.8” LED display daylight viewable
• Auto average of forward and reverse measurement
• Remote start socket
• All solid state design
• Wide range of leads and accessories available
• RS232 printer output
• Protection up to 415Vrms at the measuring terminals,
• Digital calibration and long scale length
• 6,000 count

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Micro Ohmmeter - DO7 plus

The DO7Plus is a 10A Micro ohmmeter, suitable for applications within Aerospace, Utilities, Cable or Machine Manufacturers or where a cooling curve is required to plot peak resistance. This Micro Ohmmeter comes with built in rechargeable batteries which will provide up to 1 hour of continuous use at 10A, and up to 20 hours at all other ranges.

The data log memory using the latest FRAM technology which offers unlimited read/write cycles and over 10 years of data retention, without relying on internal batteries.

Micro Ohmmeter Features DO7 plus:

• Backlit LCD graphic panel with programmable timer for battery conservation
• Qwerty Keyboard
• Temperature compensation via PT100
• Coefficients for Copper and Aluminum
• Display length of 60,000 counts
• Auto Averaging with a forward reverse measurement (removes thermal emf diff)
• Log Memory can be plotted to calculate peak resistance value at t=0
• Memory 1000 time stamped readings
• Software included to view data via download with USB, RS232
• Ruggedly constructed case IP 67 when lid is closed a d IP53 when lid is open.
• On-screen, real-time graphical plotting cooling curve facilities with peak resistance value calculator
• Reading rate of 2 readings per second
• Measuring ranges from 6mΩ - 6kΩ
• Resolution 100nΩ on 6mΩ range
• Single pulse measurement for fast resistance tests
• Continuous measurement current for inductive tests
• Full test lead continuity testing and diagnostic display
• Multilingual - display available in English, French, German, Spanish or Italian

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The DO7e is a very rugged yet compact and portable digital micro ohmmeter for the measurement of low resistance.

Using a rechargeable sealed lead acid battery with built-in charger, the DO7e is capable of measuring with a current of 10 Amps on the lowest range.

The DO7e has been designed with the latest solid state and microprocessor techniques to ensure the very best in measurement, reliability and features.

Automatic range selection, forward and reverse current measurements with auto average and a remote start socket are all included as well as an energy saving power down mode.

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The MMR-630 Series meters are professional portable instruments for measuring very low resistances. Due to their special measurement algorithm they can be used for both resistive and inductive type of a specimen that makes.

MMR-630 series perfect instruments for electricians testing electrical junctions, motors and power transformers windings. The results can be stored in the internal memory and send to a computer via serial interface. A quick PASS/FAIL test function with results displayed and acoustically indicated simplifies measurements considerably.

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