Fluke 125S Industrial ScopeMeter with Software

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FE 125/003S
Datasheet  |  Manual

Price: $2,999.95

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The Fluke 125 Industrial ScopeMeter is a rugged, reliable solution for industrial troubleshooting and installation applications.

As the latest addition to the Fluke 120 Series ScopeMeters, the Fluke 125 has advanced features for installing and troubleshooting field buses and electrical machines. The ScopeMeter performs a bus health test on industrial buses, for example, which are rapidly becoming a headache for Service, Maintenance and Installation (SMI) engineers. The test quickly determines whether the bus is working and if not, helps to identify the cause. The rugged ScopeMeter works with many Industrial Networks including AS-I bus, CAN-bus, Profibus, Foundation Fieldbus and Ethernet.

In addition, the instrument can test power input, sensor timing, motor windings, drive output timing and power measurements – thus eliminating the need for expensive, more specialized test equipment.

All Fluke’s market-leading Fluke 120 Series ScopeMeters integrate oscilloscope, true-RMS digital multimeter and dual-input ‘paperless‘ recorder in one instrument. The ScopeMeters are 600 V CAT III safety certified for machinery, instrumentation, control and power systems. The new Fluke 125 has all the features of the successful Fluke 123 and Fluke 124 ScopeMeters and, in addition to the bus health test, it also carries out effective (Vpwm) voltage measurements of motor drive output, and has 0.01 ohm resolution on the 50 Ohms range for testing motor windings. User-named data setups make for easy use.

Simple good/bad readout for Field Bus parameters

The bus health tests of the Fluke 125 ScopeMeter find defects like bad or missing terminators, bad cable splits, missing links, incorrect line loading, line interrupts, short circuit conditions and reflections. The instrument continuously acquires the bus signal and compares parameters to official specifications. It displays bus speed and measures signal quality with ‘good’ or ‘bad’ indications for parameters like rise- and fall-time, amplitude, bias level, pulse width and distortion. The instrument checks at the hardware (not protocol) level. An eye-pattern mode allows for a visual check of signal integrity.

Harmonic analysis and power consumption
Extended Harmonics Analysis of mains waveforms reaches up to the 33rd harmonic. That includes the important 3rd and 5th harmonics, which may be the cause of overheating in neutral wire or motor, as well as flat-topping of the mains voltage from non-linear loads like SMPS units. The wide frequency range covers railway (16.66 Hz) and airplane systems (400 Hz) applications.

Power measurements cover single-phase and balanced-3-phase, 3-wire systems (Watt, VA, VAR and Power Factor). Unlike PQ analyzers, the instrument is not restricted to 50/60 Hz, and can measure power at the output of motor drives and frequency converters.

The Vpwm measurement capability shows the output voltage of motor drives exactly as the motor perceives it. For electrical and combustion engines, the 125 can indicate revolutions-per-minute (rpm), and can be set up for 1 or 2 rotations per pulse, or 1 rotation per 2 or 4 pulses. A 50-ohm resistance range brings excellent 0.01-ohm resolution for checking motor windings and other wiring.

Series automates measurements from industrial systems

The Fluke ScopeMeter 120 Series performs automated measurements on motor, switch and similar signals. The 123 has a 20 MHz bandwidth, while the 124 is a 40 MHz bandwidth instrument that performs more advanced measurements. The 125 is also a 40 MHz instrument but includes features for testing Field Bus and motors. All incorporate Fluke’s unique Connect-and-View to recognize signal patterns, and automatically set up correct triggering.

The Fluke 125 includes a Power Adapter, test leads, 40 MHz probe, BP120MH battery (up to 7 hours operation) and i400s current clamp. The Fluke 125/S adds FlukeView software, carrying case and OC4USB cable.

This product - the Fluke 125S - includes FlukeView Forms software, communications cable and a durable carry case.

What's Included:

  • Fluke AC120 Alligator clips
  • Fluke BB120 Shielded BNC adapter
  • Getting started booklet
  • Fluke HC120 Hook Clips
  • Fluke PM 8907 Battery Charger/Line Voltage Adapter
  • Fluke STL120 Shielded Test Lead Set
  • Fluke BP 120 MH
  • User manual (CD-ROM)
  • Fluke VPS40 Voltage Probe, 40 MHz, 10:1
  • Fluke I400s AC Current Clamp
Fluke SCC 120 includes:

  • Hard-shell Carrying Case
  • OC4USB Optically Isolated RS-232 Adapter/Cable
  • FlukeView for ScopeMeter Windows® software

The Good:

The Bad:

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Full Review

  • Industrial Network Bus Health mode
  • Power Measurements for single phase and balanced 3-phase systems
  • Harmonics mode, up to 33rd harmonic
  • High resolution, low impedance measurements
  • Reading of Hz and Rotations Per Minute (RPM) for use with electrical and combustion engines
  • Measurement of Vpwm for use on motor drive outputs
  • ‘Save and recall’ using a user-defined name
  • Fluke i400s Current Clamp included as a standard


Bus Health mode allows for an analysis of the signal quality on industrial network, comparing measured signals to the standards’ signal requirements.  Fluke 125 is the ScopeMeter of choice for the maintenance engineer who deals with industrial machinery and the industrial network connecting his machinery the like. The Fluke 125 has all the functionality of the 124 plus it comes with the following extensions:

  • Bus Health mode gives a clear “Good” / “Bad” indication for the electrical signals on industrial buses and networks, such as CAN-bus, Profi-bus, RS-232 and many more. The Fluke 125 validates the quality of the electrical signals as soon as any electrical signals are passed along the network. It checks the signal levels and speed, transition times and distortion, and compares these to the appropriate standards to help you find errors like improper cable connections and terminators. It helps you find the source of error in case communication comes to a halt. All the commonly found industrial network types are supported!
  • Power Measurements for single phase and balanced 3-phase systems. The Fluke 125 can directly present you the Total Power (Watts), Apparent Power (VA), Reactive Power (VAR) and the Power Factor (PF), over a wide range of applied frequencies, including those seen with motor drives and inverters. As a result, you are able to easily see the effects on the various power measurements during start-up or under changing operational conditions. A current clamp is included as a standard.
  • Harmonics mode graphically displays harmonics up to the 33rd harmonic to assist in fault-finding, e.g. with large non-linear loads.
  • RPM and Hz reading for use with electrical and combustion engines.
  • Vac pwm for use on motor drive outputs, reading the true output voltage experienced by the motor itself.
  • Low impedance measurements giving a 0.01 ohms resolution for motor windings and the like.
Oscilloscope Bandwidth
40 MHz
Dual input True RMS Meter

Vdc, Vac, Vac+Vdc, Ohms,Continuity , Diode-test

Current, °C, °F, Capacitance, dBV, dBM, Crest Factor, Touch Hold and Zeroset
TrendPlot Recording

Automatic vertical scaling and time compression.

Display the actual, MIN, MAX and AVG reading.
∆T, 1/∆T, V, ∆V, rise- and fall time
Real-time sample rate

25 MS/s
Inputs and digitizers

Timebase range
20 ns - 1 min/div
Input sensitivity

5 mV - 500 V/div
Trigger types

Connect-and-View™, Free Run, Single Shot, Edge, Video, External
Glitch capture

40 ns
Scope measurements
Automatic: 26
Maximum record length

512 min/max pts per input
20 screens and setups

Environmental Specifications
Operating Temperature

0 ºC to 50 ºC
Storage Temperature

-20 °C to +60 °C
Operating Altitude

3,000 m

Safety Specifications
Electrical Safety

600V CAT III (EN61010-1)

Mechanical & General Specifications

232 x 115 x 50 mm

1.2 kg

3 years parts and labor (one year on accessories)
Battery Life

7 hrs using NiMH
RS-232 Interface

Optically isolated via optional PM9080 or OC4USB for interfacing to Printer or PC
FlukeView ScopeMeter software helps you get more out of your ScopeMeter by:

  • Documenting: Transfer screens, waveforms, and measurement data from the ScopeMeter to your PC for printing, or to import data to other programs.
  • Archiving: Store and retrieve waveforms with text annotations and create your own library for easy reference and comparison.
  • Analysis: Gather valuable measurement data and enable cursor measurements to reveal relationships and conditions. Extended recording of up to four user-selected measurements help you monitor and analyze slow moving signals and related events. Upload waveforms to the PC and use cursors for detailed measurements. Perform waveform analysis, including analyzing harmonics.

  • Windows 95/98/Me/NT4.0/2000/XP
  • Requires one free RS-232 port (COM port)
  • Requires optional PM9080 RS-232 Adapter/Cable
No user reviews available.
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