The FLUKE 125B/INT is a 120B series ScopeMeter hand held oscilloscope with 40MHz bandwidth, 2 analogue channels and universal plug type. It is a rugged solution for industrial electrical and electro mechanical equipment troubleshooting and maintenance applications. This is a truly integrated test tool with oscilloscope, multimeter and high speed recorder in one easy to use instrument. It also integrates with Fluke Connect mobile app and FlukeView for ScopeMeter software to enable further collaboration, data analysis and archiving of critical test information. The 125B includes innovative functions designed to help technicians troubleshoot faster and it has rugged design to withstand 3g vibration and 30g shock. IntellaSet technology automatically and intelligently adjusts numerical readout based on measured signal. The oscilloscope is IP51 rated according to EN/IEC60529. It has 5.7inch colour active matrix TFT display (640 x 480 pixels) and qualified by 600V CAT IV, CE, CSA.
- Rise time of less than 8.75ns and input impedance of 1Mohm/20pF (without probes and test leads)
- Maximum sample rate of 400KSPS, optically isolated USB interface
- Meter and scope recorder, full function dual input scope and meter, scope cursor measurements
- Simplified testing, more insight and faster electromechanical troubleshooting
- Dual input digital oscilloscope and two 5000 count true RMS digital multimeters
- Bus health and power and harmonics measurements
- Recorder event detect captures elusive intermittent signals on repetitive waveforms up to 4KHz
- Voltage, current and power harmonics, power measurements (W, VA, VAR, PF, DPF, Hz)
- Dimension is 259mm x 132mm x 55mm (10.2inch x 5.2inch x 2.15inch) and weight is 1.4Kg
- Operating temperature range from 0°C to 40°C (battery operation) & 0°C to 50°C (power adapter)

Applications
Test & Measurement

Contents
Fluke 125B hand held oscilloscope, Shielded test leads with black ground leads, Black test lead (for grounding), Hook clips (red, blue), Banana to BNC adapters (black, x1), 10:1 voltage probe, i400s AC current clamp, USB angled adapter, Wi-Fi USB adapter, Switch mode power supply, Adapter/battery charger, Rechargeable Li-ion battery pack.

Footnotes
In addition, we have calibration services for this product. Choose from a Standard Certificated Service or an internationally recognised UKAS accredited calibration. Visit our calibration service page for more details.

Fluke 190-204-III-S Offers
Accurate and versatile, this portable oscilloscope provides a fast sampling rate of up to 5 GS/s, a 200 ps resolution, and deep memory of 10,000 samples per channel. Perform timing or amplitude-related measurements on three phases or three-axis control systems, or compare and contrast multiple test points in a circuit under test.
- Up to four independent floating isolated inputs, up to 1000 V
- Up to 5 GS/s real time sampling (depending on model and channels used)
- Deep memory: 10,000 points per trace waveform capture (scope mode)
- CAT III 1000 V/CAT IV 600 V safety rated instrument for industrial environments
- Up to seven hours of battery operation using BP291
- Large, bright color display is easy to view in nearly any environment
- Easy to store and view historical data and transfer to a PC via USB or Wifi
- Convenient battery access door for quick battery swaps in the field
- IP51 rating, dust and drip-proof
- Connect-and-View triggering for intelligent, automatic triggering on fast, slow and even complex signals
- Frequency spectrum using FFT-analysis
- Automatic capture and REPLAY of 100 screens
- ScopeRecord mode gives 30,000 points per input channel for low frequency signal analysis
- TrendPlot Paperless Recorder mode with deep memory for longterm automatic measurements
- 5000 count DMM included in the 2-channel models

Applications
- Microelectronics
- Troubleshooting

Measure from mV to kV safely

Independently isolated inputs allow you to make measurements in mixed circuits having different ground references reducing the risk of accidental short circuits. Conventional bench oscilloscopes without special differential probes and isolation transformers can only reference measurements to line power earth ground. ScopeMeter 190 Series III test tools are engineered to cover a wide application range from mV to kV, so you’re ready for anything from microelectronics to heavy duty higher voltage electrical applications. 190 Series III 60 MHz and 100 MHz configurations include VPS421 100:1 probes for higher voltage applications, while the 200 MHz and 500 MHz configurations include VPS410-II 10:1 probes suitable for both microelectronics and higher voltage applications.

IP-51 rated for harsh environments

Rugged and shock-proof, ScopeMeter Test Tools are built for dirty, hazardous environments. With its sealed case, it can endure dust, drips, humidity and airborne pollutants. Every time you reach for ScopeMeter Test Tool you can be confident it will work reliably wherever your work takes you.

USB and Wi-Fi connectivity

The Fluke 190 Series III offers two USB ports, electrically isolated from measurement input circuits allowing you to quickly and easily transfer data to a PC, archive and share waveforms with OEMs, colleagues and support staff, or store waveforms, screen captures and instrument setups onto USB memory devices for later use. Easily transfer saved files via USB stick, direct connection via the USB interface or optional Wi-Fi connectivity. These files can be used for further data handling or in FlukeView-2 Software to study waveforms in greater detail.

Connect-and-View triggering

Connect-and-View triggering provides an instant, stable display without the need for adjusting settings. If you’ve used other scopes, you know how tricky triggering can be. If settings are incorrect, results can be unstable or incorrect. Connect-and-View automatically sets up correct triggering by recognizing signal patterns. Without touching a button, you get a stable, reliable and repeatable display of virtually any signal including motor drive and control signals. It’s especially fast and convenient when you’re measuring a number of test points in rapid succession.

Built-in digital multimeter

Conveniently switch from waveform analysis to precise multimeter measurements using the built in 5000 count digital multimeter on two channel 190 Series III models. Measurement functions include Vdc, Vac, Vac+dc, resistance, continuity and diode test. Measure current and temperature using suitable shunt, probe or adapter with wide range of scaling factors.

TrendPlot paperless recorder— records up to 11 days to help you find intermittent faults

The toughest faults to find are those that happen only once in a while. These intermittent events can be caused by bad connections, dust, dirt, corrosion, or simply broken wiring or connectors. Line outages, dips, swells and interruptions, or the starting and stopping of a motor can also cause a machine to stop. You may not be around when it happens, but the 190 Series III ScopeMeter Test Tool will be.
- Plot minimum and maximum peak values and average over time
- Plot any combination of up to four readings including voltages, amps, temperature, frequency and phase for all inputs, all with time and date stamp to pinpoint faults

Simplify complex motor drive troubleshooting with guided test setups and automatic drive measurement that provide reliable, repeatable test results.
The Fluke MDA 550 Motor-Drive Analyzer saves time and the hassle of setting up complex measurements, and simplifies the troubleshooting process. Simply select a step-by-step guided test and measurement will show you where to make voltage and current connections, while preset measurement profiles ensure you will get all the data you need for every critical motor drive part, from input to output, the DC bus, and the motor itself . Doing simple to complex measurements? MDA-550 can do it. What's more, making reports before (as-found) and after (as-left) repairs or adjustments becomes more practical. This is all thanks to its built-in report generator feature.

The MDA-550 is an ideal portable motor drive analysis testing tool. Not only that, this tool can also be used to safely detect and solve common problems in inverter-type motor drive systems.

- Measures main motor drive parameters , including voltage, current, DC bus voltage level and AC ripple, voltage and current unbalance and harmonics, voltage modulation, and motor shaft voltage discharge.
- Performs broader harmonic measurements to identify the impact of low and high order harmonics on your power system.
- Performs guided measurements of motor drive input, DC bus, drive output, motor input, and shaft measurements with step-by-step graphical diagrams of voltage and current connections.
- Uses simple measurement settings with preset measurement profiles to automatically trigger data collection based on the selected test procedure.
- Quickly and easily generate reports that are perfect for documenting problem solving and collaborative work with others.
- Measure additional electrical parameters with a complete 500 MHz oscilloscope, meter and logger capability for a wide range of electrical and electronic measurements in industrial systems

The Fluke MDA-550 Motor Drive Analyzer uses guided test measurements to make analysis even easier

Drive input

Quickly measure input voltage and current to see if values ??are within acceptable limits by comparing the rated voltage to the actual supply voltage. It then checks the input current to determine if the current is within its maximum rating and the conductor size is appropriate. You can also check if the harmonic distortion is within an acceptable level. There are two options for doing this: carefully examine the shape of the waveform or look at the harmonics spectrum screen which displays total harmonic distortion and individual harmonics.

Imbalance of voltage and current

Check the voltage unbalance at the input terminals so you can make sure the voltage unbalance is not too high (> 6-8%), and the phase rotation is correct. You can also check for current unbalance, as too large an imbalance can indicate a driving rectifier problem.

Wider harmonic measurement

Excess harmonics are not only a threat to your rotating machine, but also to other equipment connected to the mains power system. As well as being able to detect motor drive harmonics, the MDA-550 can also detect the potential impact of inverter switching electronics. The MDA-550 has three harmonic ranges, 1st to 51st harmonics, 1 to 9 kHz, and 9 kHz to 150 kHz providing the ability to detect harmonic pollution problems.

Bus DC

In motor drives, the conversion of AC to DC inside the drive is very important. The reason is that for the best drive performance it is necessary to have the right voltage and adequate smoothing with low ripple. High ripple voltages can be an indicator of a faulty capacitor or a faulty motor connected. The logging function can be used to dynamically check the performance of the DC bus in operating mode when load is applied.

Drive output

Check drive output focusing on voltage to frequency (V/F) ratio, and voltage modulation. If the V/F ratio is high, the motor may overheat. With a low V/F ratio, the connected motor may not be able to provide the torque required at the load to carry out the process for which it is intended.

Voltage modulation

Pulse Width Modulation signal measurements are used to check for high voltage peaks that can damage motor winding insulation. The rise time or steepness of the impulse is indicated by a dV/dt reading (value of change in voltage over time), this must be compared with the specified motor insulation. Metering can also be used to measure switching frequency. Its purpose is to detect whether there is a potential problem with the switching electronics, or with grounding, as the signal drifts up and down.

Input Motor

Ensuring the supply of voltage at the motor input terminal is important. However, choosing a connecting cable between the drive and the motor is no less important. Incorrect cable selection can cause damage to the drive and motor due to overvoltage peaks. Checking that the current at the terminals is within the motor's rating is critical because excess current can cause the motor to overheat, reducing the life of the stator insulation which can cause premature failure of the motor.

Motor shaft voltage

The voltage impulse in the variable speed drive is generated from the circuit between the motor stator and the rotor until a voltage appears on the rotor shaft. If the rotor shaft voltage exceeds the insulating capacity of the bearing grease, flashover currents (glow) may occur. As a result, pitting and fluting of the motor bearing rotation occurs, namely damage that causes the motor to fail prematurely. The MDA-550 is equipped with a carbon fiber brushed probe tip that makes it easy for you to detect destructive flashover currents. Meanwhile, the amplitude of the impulse and the number of events can be used as a consideration in taking preventive action. With the addition of these accessories and capabilities, you can spot potential faults without the need to buy expensive permanent solutions.

Step-by-step guided measurements ensure you have the data you need, when you need it

The MDA-550 is designed to help you quickly and easily test and troubleshoot common three-phase and single-phase inverter-type motor drive systems. Onscreen information and a step-by-step setup guide make it easy for you to configure the analyzer. Not only that, the information and guide will also provide the required drive measurements. That way, you can quickly make informed decisions regarding maintenance. From power input to attached motor, the MDA-550 provides measurement capabilities for the fastest motor drive solutions.

Fluke 190-504-III Offers
Accurate and versatile, this portable oscilloscope provides a fast sampling rate of up to 5 GS/s, a 200 ps resolution, and deep memory of 10,000 samples per channel. Perform timing or amplitude-related measurements on three phases or three-axis control systems, or compare and contrast multiple test points in a circuit under test
- Up to four independent floating isolated inputs, up to 1000 V
- Up to 5 GS/s real time sampling (depending on model and channels used)
- Deep memory: 10,000 points per trace waveform capture (scope mode)
- CAT III 1000 V/CAT IV 600 V safety rated instrument for industrial environments
- Up to seven hours of battery operation using BP291
- Large, bright color display is easy to view in nearly any environment
- Easy to store and view historical data and transfer to a PC via USB or Wifi
- Convenient battery access door for quick battery swaps in the field
- IP51 rating, dust and drip-proof
- Connect-and-View triggering for intelligent, automatic triggering on fast, slow and even complex signals
- Frequency spectrum using FFT-analysis
- Automatic capture and REPLAY of 100 screens
- ScopeRecord mode gives 30,000 points per input channel for low frequency signal analysis
- TrendPlot Paperless Recorder mode with deep memory for longterm automatic measurements
- 5000 count DMM included in the 2-channel models

Applications
- Microelectronics
- Troubleshooting

Measure from mV to kV safely

Independently isolated inputs allow you to make measurements in mixed circuits having different ground references reducing the risk of accidental short circuits. Conventional bench oscilloscopes without special differential probes and isolation transformers can only reference measurements to line power earth ground. ScopeMeter 190 Series III test tools are engineered to cover a wide application range from mV to kV, so you’re ready for anything from microelectronics to heavy duty higher voltage electrical applications. 190 Series III 60 MHz and 100 MHz configurations include VPS421 100:1 probes for higher voltage applications, while the 200 MHz and 500 MHz configurations include VPS410-II 10:1 probes suitable for both microelectronics and higher voltage applications.

IP-51 rated for harsh environments

Rugged and shock-proof, ScopeMeter Test Tools are built for dirty, hazardous environments. With its sealed case, it can endure dust, drips, humidity and airborne pollutants. Every time you reach for ScopeMeter Test Tool you can be confident it will work reliably wherever your work takes you.

USB and Wi-Fi connectivity

The Fluke 190 Series III offers two USB ports, electrically isolated from measurement input circuits allowing you to quickly and easily transfer data to a PC, archive and share waveforms with OEMs, colleagues and support staff, or store waveforms, screen captures and instrument setups onto USB memory devices for later use. Easily transfer saved files via USB stick, direct connection via the USB interface or optional Wi-Fi connectivity. These files can be used for further data handling or in FlukeView-2 Software to study waveforms in greater detail.

Connect-and-View triggering

Connect-and-View triggering provides an instant, stable display without the need for adjusting settings. If you’ve used other scopes, you know how tricky triggering can be. If settings are incorrect, results can be unstable or incorrect. Connect-and-View automatically sets up correct triggering by recognizing signal patterns. Without touching a button, you get a stable, reliable and repeatable display of virtually any signal including motor drive and control signals. It’s especially fast and convenient when you’re measuring a number of test points in rapid succession.

Built-in digital multimeter

Conveniently switch from waveform analysis to precise multimeter measurements using the built in 5000 count digital multimeter on two channel 190 Series III models. Measurement functions include Vdc, Vac, Vac+dc, resistance, continuity and diode test. Measure current and temperature using suitable shunt, probe or adapter with wide range of scaling factors.

TrendPlot paperless recorder— records up to 11 days to help you find intermittent faults

The toughest faults to find are those that happen only once in a while. These intermittent events can be caused by bad connections, dust, dirt, corrosion, or simply broken wiring or connectors. Line outages, dips, swells and interruptions, or the starting and stopping of a motor can also cause a machine to stop. You may not be around when it happens, but the 190 Series III ScopeMeter Test Tool will be.
- Plot minimum and maximum peak values and average over time
- Plot any combination of up to four readings including voltages, amps, temperature, frequency and phase for all inputs, all with time and date stamp to pinpoint faults