Megger MTR105 Rotating Machine Tester

The Megger MTR105 Rotating Machine Tester is a handheld, durable and versatile static motor tester. The Megger MTR105 Rotating Machine Tester can also be used as an insulation resistance tester, DLRO (Digital Low Resistance Ohmmeter), voltmeter and LCR meter. Additionally, it is equipped with a thermocouple for measuring the temperature of the units-under-investigation; this, in turn, facilitates temperature-compensated insulation resistance tests.

For a quick introduction to the Megger MTR105 Rotating Machine Tester's measurement capabilities please see the following video and bullet points.

Insulation Resistance Tests

• Range: 100Ω to 200GΩ
• Supports PI, DAR, timed and temperature compensation
• Stabilised insulation test voltage provides a more accurate test voltage without risking over-voltage damage to circuits or components. The output voltage is maintained between 0 and 2% throughout the test range and is accurate to ±2V
• Variable test voltage range: 10V to 999V. This allows the user to select the exact voltage when a non-standard voltage is required; this voltage is also subject to stabilised output control (above)
• Buzzer button: ON, VISUAL or OFF options
• The buzzer can be adjusted to accommodate the required minimum resistance limit: 0.5MΩ to 1000MΩ
• Buzzer alert issued when the test has been passed

Voltmeter

• 10 mV to 1000V AC
• 0 to 1000V DC
• TRMS: 15Hz to 400 Hz
• Three-phase supply and direction of rotation

Continuity (Resistance) Test

• Single automatic resistance range: 0.01Ω to 1.0MΩ
• Automatic test current selection uses the preferred test current for the load resistance under investigation (200 mA up to 4Ω)
• Bi-directional test: automatically reverses the current, removing the need to reconnect the test leads
• Lead Resistance Compensation/ NULL: nullifies up to 10Ω of test lead resistance
• Dedicated buzzer switch: ON, VISUAL or OFF
• When a test is passed the buzzer will sound
• The buzzer can be programmed to accommodate the maximum resistance limit: 1Ω to 200Ω in 12 steps

DLRO: Four-Wire Kelvin Low Resistance

• Automatic resistance range: 1mΩ to 10Ω
• 200mA test current
• Auto and manual test options
• Bi-direction and single direction options
• Bi-directional tests automatically reverse the current removing the need to reconnect leads

Motor Direction of Test

• The motor is rotated in one direction and the phase sequence is indicated on the display
• The motor is rotated in the opposite direction; the phases are checked and indicated on the display

Inductance, Capacitance and Resistance Meter (LCR)

• Auto inductive, capacitive and resistive tests
• Selectable frequency: 120Hz or 1000Hz
• Auto mode: automatically determines and indicates whether the main element of the load is inductive, capacitive or resistive
• Selectable inductance and capacitance test

Test results are indicated via the Megger MTR105 Rotating Machine Tester’s full-colour graphic display. The test results for up to 256 motors can be recorded to the Megger MTR105 Rotating Machine Tester; these results can be downloaded to a USB drive. Test results downloaded to a USB device can be accessed by plugging the USB into a PC with Megger’s PowerDB Test Data Management Software installed.

Required tests are easily accessible using the rotary dial; other practical features present on the Megger MTR105 Rotating Machine Tester include guard terminals designed to eliminate surface leakage current whilst detachable test leads with interchangeable clips and probes allow the user to adapt this handheld static motor tester for various applications quickly and easily.

Additionally, the Megger MTR105 Rotating Machine Tester has been constructed to include a tough, rubber over-moulding laid on top of a strong modified ABS housing: the rubber over-moulding provides shock-absorbing outer protection whilst improving the Megger MTR105 Rotating Machine Tester’s grip. This robust instrument has an environmental protection rating of IP54 ensuring that the entire unit, including the battery and fuse compartment, is protected against dust and water ingress.  

Further to this, the Megger MTR105 Rotating Machine Tester is equipped with several safety features and has a safety protection rating of CAT III 600V up to 3000m. This instrument is also compliant with IEC61010 and IEC61557 requirements. Its fast-detecting circuitry reduces the possibility of damage to the unit if it is accidentally connected to live circuits or across phases; it will issue a notification when accidentally connected to a live circuit, as well as halt the testing procedure (except when conducting direction of rotation measurements). The Megger MTR105 Rotating Machine Tester also features detection and inhibit functions when the protection fuse has failed and features a user-selectable insulation test terminal lockout voltage (25V, 30V, 50V and 75V, the default is 50V).

The Megger MTR105 Rotating Machine Tester’s extensive testing capabilities and durable, safe design make it suitable for a variety of applications across a range of industry sectors. For example, this instrument can be used across the utilities, industrial, OEM, service and transport industries in the following capacities:

• Testing repaired and refurbished motors and generators
• Monitoring and maintaining in-service motors (offline) in the field
• Testing newly manufactured motors and generators

The Megger MTR105 Rotating Machine Tester is a versatile, real-world handheld motor tester, voltmeter, DLRO, insulation resistance tester and LCR meter suitable for checking a range of motors across numerous industries.

Megger MTR105 Rotating Machine Tester Key Features

• A handheld, durable and versatile static motor tester
• Can also be used as an insulation resistance tester, DLRO, voltmeter and LCR meter
• Equipped with a thermocouple for measuring the temperature of the unit-under-investigation
• Temperature-compensated insulation resistance tests
• Insulation resistance range: 100Ω to 200GΩ
• Supports PI, DAR, timed and temperature compensation
• Stabilised insulation test voltage provides a more accurate test voltage without risking over-voltage damage to circuits or components
• The output voltage is maintained between 0 and 2% throughout the test range and is accurate to ±2V
• Variable test voltage range: 10V to 999V
• Select the exact voltage when a non-standard voltage is required; this voltage is also subject to stabilised output control
• Insulation resistance buzzer button: ON, VISUAL or OFF options
• The buzzer can be adjusted to accommodate the required minimum resistance limit: 0.5MΩ to 1000MΩ
• The insulation resistance buzzer alert is issued when the test has been passed
• Voltmeter AC range: 10 mV to 1000V AC
• Voltmeter DC range: 0 to 1000V DC
• TRMS: 15Hz to 400 Hz
• Three-phase supply and direction of rotation
• Single automatic continuity/ resistance range: 0.01Ω to 1.0MΩ
• Automatic test current selection uses the preferred test current for the load resistance under investigation (200 mA up to 4Ω)
• Bi-directional test: automatically reverses the current, removing the need to reconnect the test leads
• Lead Resistance Compensation/ NULL: nullifies up to 10Ω of test lead resistance
• Dedicated continuity/ resistance buzzer switch: ON, VISUAL or OFF
• When a continuity/ resistance test is passed the buzzer will sound
• The continuity/ resistance buzzer can be programmed to accommodate the maximum resistance limit: 1Ω to 200Ω in 12 steps
• Automatic DLRO resistance range: 1mΩ to 10Ω
• DLRO: 200mA test current
• Auto and manual test DLRO options
• Bi-direction and single direction DLRO options
• Bi-directional DLRO tests automatically reverse the current removing the need to reconnect leads
• Motor direction of test: tests the direction of rotation of the motor-under-test and displays the phase sequence
• LCR meter: auto inductive, capacitive and resistive tests
• LCR meter selectable frequency: 120Hz or 1000Hz
• LCR meter Auto mode: automatically determines and indicates whether the main element of the load is inductive, capacitive or resistive
• Selectable inductance and capacitance test
• Full-colour, graphic display
• Test results for up to 256 motors can be saved
• Download test results to a USB drive
• View results on a PC with the Megger PowerDB Test Data Management Software (NOT included) installed
• Rotary Dial control
• Guard terminals eliminate surface leakage current
• Detachable test leads and interchangeable clips and probes
• Tough, rubber over-moulding covering a strong ABS housing
• The rubber over-moulding provides shock-absorbing outer protection and improved grip
• IP54
• CAT III 600V up to 3000m
• Compliant with IEC61010 and IEC61557
• Fast detecting circuitry reduces the possibility of damage to the unit if accidentally connected to a live circuit or across phases
• Issues a notification when accidentally connected to a live circuit and will halt testing procedures (except when conducting direction of rotation measurements)
• Detection and inhibit functions for when the protection fuse has failed
• User-selectable insulation test terminal lockout voltage (25V, 30V, 50V and 75V, default is 50V)
• Suitable for use in the utilities, industrial, OEM, service and transport industries
• Test repaired and refurbished motors and generators
• Monitor and maintain in-service motors (offline) in the field
• Test newly manufactured motors and generators
• A versatile, real-world handheld motor tester, voltmeter, DLRO, insulation resistance tester and LCR meter
• Suitable for checking a range of motors across numerous industries

What’s Included?

• Megger MTR105 Rotating Machine Tester 
• Hook Strap Assembly
• Soft Pouch
• Type-T Temperature Probe
• 3x Grabber Clips (Red, Black and Blue) CAT III 1000V, CAT IV 600V
• 3x 4mm Test Leads (Red, Black and Blue), 2m, 1 End Right-angle, 1 End Straight CAT III 1000V, CAT IV 600V
• 3x Long Reach, 100mm Test Probes (Red, Black and Blue) CAT III 1000V, CAT IV 600V
• 2x Kelvin Clip Lead, 2m
• 4x 4mm Right-angled Connector
• 1x Single, 2-core Cable