Megger MTR105X Motor Tester w/Bluetooth, DLRO Kelvin, 3 Phase, Cat3, MTR105 Series

Megger MTR105X Rotating Machine Tester Overview

The Megger MTR105X rotating machine tester is a portable, real-world motor testing device designed for testing and diagnosing motors and generators across industrial, utility, and maintenance environments. It combines insulation resistance (IR) testing, low resistance measurement, voltage testing, and motor rotation analysis in a rugged, IP54-rated handheld instrument. With Bluetooth-enabled data streaming, temperature compensation, and advanced test capabilities such as DLRO four-wire Kelvin measurement, the MTR105X delivers accurate, efficient motor diagnostics for production testing, repair verification, and field maintenance

Specifications

• Insulation resistance testing up to 200 G

• Adjustable test voltage from 10 V to 999 V

• AC voltage measurement: 10 mV to 1000 V (TRMS)

• DC voltage measurement: 0 to 1000 V

• Continuity measurement: 0.01 Ω to 1 MΩ

• Four-wire low resistance (DLRO): 1 mΩ to 10 Ω (200 mA test current)

• Capacitance range: 0.1 nF to 1 mF

• Temperature measurement range: -20 °C to 1000 °C (instrument range)

• Frequency range: 15 Hz to 400 Hz

• Data storage: 256 motor test results with time/date stamp

• Safety rating: CAT III 600 V

• Environmental protection: IP54 rated housing

Key Benefits

• Dedicated motor and generator testing solution
  Combines insulation, resistance, and rotation tests in one device

• Improved diagnostic accuracy
  Guard terminal and temperature compensation reduce measurement errors

• Bluetooth data management (MTR105X)
  Enables live data streaming, onboard storage, and reporting

• Efficient workflow and reduced equipment needs
  Eliminates the need for multiple motor testing instruments

• Rugged industrial design
  IP54-rated, shock-resistant housing for field and workshop use

• Comprehensive motor diagnostics
  Supports insulation resistance, PI, DAR, DLRO, inductance, capacitance, and rotation testing

• Built-in data storage and USB export
  Stores up to 256 motor test results with time/date stamping for easy reporting and traceability.

• Guard terminal eliminates any surface leakage current
  A third terminal (G) on the connection panel provides a return path reducing the possibility of errors.

Application Uses

• Production testing of motors and generators

• Testing repaired or refurbished motors

• Preventive maintenance of in-service motors (offline testing)

• Industrial maintenance and factory operations

• Utilities including power generation, water, and oil & gas

• Motor repair workshops and OEM environments

• Transport sectors including rail, marine, and electric vehicles

Who is This Product For?

• Motor and generator technicians

• Industrial maintenance engineers

• OEM manufacturers

• Motor repair and service workshops

• Utilities and infrastructure teams

• Field service engineers and contractors

• Electric vehicle and transport technicians

What's Included

• MTR105X with Bluetooth

• Hook strap assembly

• Soft pouch carry case

• Temperature probe (Type T, CAT III 600 V)

• IR lead set (grabber clips, test leads, and probes)

• Kelvin clip lead set (CAT III 600 V)

• Calibration certificate

• USB memory stick

• 6 × AA alkaline batteries (installed)

FAQ Questions and Answers

1. Can the MTR105 measure motor direction and rotation?
   Yes, the MTR105 includes a dedicated test to determine both the motor's direction of rotation and the three-phase supply rotation. This ensures correct installation before the machine is energized.

2. Does the MTR105 offer 4-wire Kelvin low-resistance testing?
   Yes, the MTR105X supports 4‑wire Kelvin low‑resistance (DLRO) testing, enabling highly accurate measurements of low resistance in motor windings and connections using a 200 mA test current.

3. What is the difference between the Megger MTR105 and MTR105X?
   The MTR105X includes Bluetooth connectivity for real-time data streaming, storage, and reporting, while the MTR105 offers the same core motor testing functions without wireless communication.