Doble M Rent and purchase options available at JM Test. The M is the leading instrument for evaluating the condition of high-voltage power. Insulation systems associated with many types of high-voltage power apparatus and devices often consist of a mix of non-homogeneous component parts. The Doble M evaluates the integrity of high-voltage substation apparatus by measuring the power factor/tangent delta along with capacitance to evaluate.

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The M instrument comes with M software to simplify the management of test results. The M was engineered from the ground up to overcome the common problems that plague other test instruments. Get a quick quote: Doble M Power Factor tester.

The M also uses a patented technique called Line Frequency Modulation, in which measurements are made at a frequency above and below the system frequency, to eliminate the effect of electrostatic interference. The Liquid-Insulation Cell Oil Cellalso supplied with the M, can be used in the field for a quick accuracy check. The result is highly accurate and repeatable measurements. It sets the standard for accuracy, reliable test results, and intelligent diagnostics for customers worldwide.

The M allows you to perform a variety of diagnostic tests: The internal measurement circuitry is fully digital.


Doble M Insulation Analyzer • Sales, Rent, Calibration, & Repair at JM

Click the “Get A Quick Quote” button to get started. Generates its own clean test signal for the most reliable and repeatable results. Cleaning, dielectric testing, drying, visual inspections, stamping, packing, and documentation is all Even a small change in a measurement becomes a reliable diagnostic indicator.

New PurchaseRental. Provides the highest power to better replicate in-service conditions. If you need more current than mA for large apparatus, the Type C Resonator option extends the range. Automated setup eliminates errors. We can also help with these: The accuracy of test results is directly related to the quality of the test signal. It also measures capacitance, to evaluate physical changes to the apparatus.

The M is the leading instrument for evaluating the condition of high-voltage power apparatus. Records are presented in a format that is easy to read, save, and print. Electrical Safety Onsite Testi Electrical glove testing is available at JM Soble Systems. One stop for your electrical safety equipment needs, cleaning, and electrical testing services.

Doble M4100, 4th Gen

With a maximum output of mA at 10 kV, the M offers high charging doblw, allowing you to run single-phase exciting current tests at higher voltages, increasing the turn-to-turn stress. JM Test Rental options can help you save capital, get the latest technology, and expand your capabilities. It also offers a range of built-in self-diagnostic tools.


M software makes testing easy, fast, and smart. Advanced digital technology takes accuracy to new levels. Get a Quick Quote.

Dielectric testing for our electrical testing laboratory. Daily, Weekly and Monthly rates are available on select 4m100. Unlike other test instruments, the M eliminates the need to balance the bridge, automatically making measurements for you.

This produces reliable results and stable readings.

While most test instruments use available power lines or portable generators to generate the output test signal, the M uses an internal waveform generator to create its own precise sine wave. Built-in test set diagnostics provide information on instrument status. Rugged construction provides the accuracy of a laboratory instrument with the ability to withstand harsh field conditions. The M has the power to test a wide range of apparatus, making it highly versatile.

The quality of the power source is not an issue.