Motor Testing

How to Prevent Downtime with the Latest Tools

Don’t Let Business Operations Stall

Many industries, including wastewater, steel, automotive and power generation industries, use electric motors to sustain production processes by converting inputs into mechanical power. Electric motor systems contain dozens, if not hundreds, of parts vital for business operation. Preventative motor testing measures are necessary to ensure your daily responsibilities continue.

Motor Testing Importance

Professionals often think if a motor sounds like it’s working, then systems must be in order. However, this assumption is far from the truth. Motor failures can happen when your team least expects it.

In addition, not all winding faults start as ground faults. Instead, they can start as a weakness in the winding insulation system that may eventually fault to ground when the motor stops running.

Motor testing is integral to the success and efficiency of your business. ALL-TEST Pro instruments ensure that testing your motor is safe, easy, and dependable. Our capabilities for troubleshooting and predictive maintenance are a means of sustaining critical systems and achieving meaningful ROI.

ALL-TEST Pro provides hand-held diagnostic devices for testing key motor components to fix small issues before they get bigger.

Why Traditional Megohmmeter Testing Isn’t Enough

Megohmmeter insulation testing only detects faults to ground. Since only a portion of motor electrical winding failures begin as ground faults, they will go undetected using this method alone. Moreover, surge testing requires the application of high voltages. This can be destructive when testing a motor, making it an unsuitable method for troubleshooting and true predictive maintenance testing.

ALL-TEST Pro devices offer more complete motor testing than any other options on the market. Our instruments go above and beyond normal testing equipment for accurate, safe, and fast motor testing. Motor testing using an MCA™ tool is very easy to implement, and the test takes less than three minutes. Save money and time by proactively detecting developing faults before they cause irreversible motor failures.


Meg-ohm Meter



Ground Faults




Internal Winding Faults




Open Connection




Rotor Faults








All Test Pro AT34EV conducting live motor testing.

Benefits of ALL-TEST Pro Devices

While traditional tools, such as a megohmmeter, are unable to detect small developing winding faults, our devices, such as the ALL-TEST PRO 7™, provide comprehensive, accurate information of the winding insulation, winding insulation to ground, and rotor.

Benefits include:

  • Hand-held (usable in any environment)
  • Provide 6+ Diagnostic Readouts (opposed to current Megohmmeters with only 1)
  • Easy to Operate
  • Responsive Customer Support

Deenergized (MCA) vs Energized (ESA)

MCA™ Deenergized Testing

MCA™ is a non-destructive deenergized test method to assess the health of a motor from the Motor Control Center (MCC) or directly at the motor, providing immediate and complete information on the status of the stator, rotor, connections, contamination, and insulation to ground.

ESA Energized Testing

Electrical Signature Analysis (ESA) is an energized test method where voltage and current waveforms are captured while the motor system is running, providing valuable information for AC induction and DC motors, generators, wound rotor motors, synchronous motors, machine tool motors, and more.

ALL-TEST PRO 31™ motor testing instrument with test leads against white background

Motor Testing With ALL-TEST Pro Devices

Using hand-held devices from ALL-TEST Pro is simple with our patented technology displaying onscreen instructions. Select models are optimized for voltage readings across induction, synchronous and single-phase motors and attach via included clips and push-pull connectors. Browse our list of motor testing products to find a compatible device for your current system.

About ALL-TEST Pro

ALL-TEST Pro is a leading manufacturer of electric motor predictive maintenance (PdM) equipment and condition monitoring tools. ALL-TEST Pro electric motor testing devices surpass other instruments by accurately and quickly diagnosing motor health issues to ensure electric motor reliability and reduce unnecessary facility operational and repair costs. All diagnostic instruments are handheld and lightweight making them exceptionally suitable for field testing applications. The current line of motor testing devices use Motor Circuit Analysis (MCA), a proprietary technology developed by ALL-TEST Pro, and electrical signature analysis, to evaluate electrical issues of components within motors. ALL-TEST Pro products are widely used in nearly every industry that uses electric motors, generators or transformers, and are available worldwide.

Contact Us

Email: [email protected]
Tel: +1 860-399-4222
Fax: 860-399-3180

Email: [email protected]
Tel: +1 860-399-4222

Corporate Headquarters
20 Research Parkway, Suite G
Old Saybrook, CT 06475

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