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Fluke 120 series

Digital Oscilloscope

Fluke 120 Series Industrial ScopeMeter®
Fluke 125: 40 MHz
Fluke 124: 40 MHz
Fluke 123: 20 MHz

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ScopeMeter® 120 Series: Three-in-one simplicity

The compact ScopeMeter 120 Series is the rugged solution for industrial troubleshooting and installation applications. It’s a truly integrated test tool, with oscilloscope, multimeter and “paperless recorder in one affordable, easy-to-use instrument. Find fast answers to problems in machinery, instrumentation, control and power systems.






ScopeMeter® 120 Series : As simple as one-two-three

  • Dual-input 40 MHz or 20 MHz digital oscilloscope
  • Two 5,000 counts true-RMS digital multimeters
  • Automatic measurements
  • A dual-input TrendPlot™ recorder
  • Connect-and-View™ trigger simplicity for hands-off operation
  • Shielded test leads for oscilloscope, voltage, resistance and continuity measurements
  • 10:1 Voltage Probe included with Fluke 124 and 125 for high frequency measurements
  • Up to 7 hours battery operation
  • 600 V CAT III safety certified
  • Optically-isolated interface for PC connection
  • Rugged, compact case
  • Fluke 125 gives bus health and power measurements

In today’s complex systems, a meter measurement just doesn’t give enough detail to determine the cause of a fault. Signal anomalies, dropouts and glitches that might cause a machine to go down, are best displayed with an oscilloscope. The ScopeMeter 120 Series meet today’s need of simultaneously measuring and checking waveforms. The unique Connect-and-View™ triggering automatically displays stable waveforms of virtually any signal. It really is as easy as one-two-three!

A three-in-one tool


Dual-input measurement shows both meter reading and waveform at the same time today’s need of simultaneously
ScopeMeter 120 Series combines a 40 or 20 MHz dual input digital storage oscillo-scope, two true-RMS digital multimeters and a dual input TrendPlot™ recorder all in a compact, battery powered instrument. Leave all other test tools behind, the ScopeMeter 120 Series is the only tool you’ll need

One test lead measures all


Check the starting capacitor of a motor using the ScopeMeter 120 Series
High frequency waveform-, meter-, capacitance- and resistance-measurements as well as continuity checks are all covered by the shielded test leads. No time wasted finding or swapping leads. The included accessories allow hook-up at test objects of every dimension.

The confidence to do a better job


Open the measure menu and select from 26 scope- and meter-measurements
Working under time pressure and in cramped or difficult to reach locations means you want to focus on the job at hand, not on the test tool in your hand. Which is why the ScopeMeter 120 Series has Connect-and-View automatic triggering.You don’t have to worry about triggering and instrument settings, and you have all the information on screen to do the job right.

Battery powered mobility
Up to seven hours of battery operation frees you from mains outlets for true on-the- move working. The handheld format and the weight of just 1.2 kg, make the instrument easy to carry and to fit comfortably in your hand. The rugged and drip proof case assures long life and reliable operation in the harshest industrial environments.

Floating measurements, safety certified
While conventional oscilloscopes can only make measurements referenced to power line ground, the Fluke 120 Series make floating measurements so there is no risk of an accidental ground short circuit when making a connection. The ScopeMeter 120 Series and the included shielded test leads are safety certified for measurements on 600 V CAT III industrial power systems. And using the VPS40 probe, measurements up to 1000 V CAT II re fully supported! Via the optically isolated RS-232 or USB interface, the ScopeMeter 120 Series can be safely connected to a printer for direct print-out or to a PC for later analysis and documentation using FlukeView software.

Connect-and-View™ triggering for an instant, stable display


Connect-and-View captures even the most complex motor drive signals
Scope users know how difficult triggering can be. Wrong settings show unstable and sometimes wrong results. Fluke’s unique Connect-and-View recognizes signal patterns, and automatically sets up correct triggering. It provides a stable, reliable and repeatable display of virtually any signal - including motor drive and control signals - without you touching a button. Signal changes are instantly recognized and settings adjusted for a stable display. Benefit from the speed and convenience when measuring a number of test points in quick succession.

Use TrendPlot™ to help find intermittents, fast


Cursors and zoom help you analyze the captured TrendPlot
The toughest faults to find are those that happen only once in a while: intermit-tents. They can be caused by bad connections, dust, dirt, corrosion or simply broken wiring or connectors. You may not be around to see it — your Fluke ScopeMeter will. In this “paperless recorder mode, you can plot the minimum and maximum peak values and average over time – up to 16 days. The two inputs can plot any combination of volts, amps, temperature, frequency and phase - with time and date stamp -to help lead you to the cause of those faults quickly.

Based on the 124, the Fluke 125 offers additional test capabilities for measurements on industrial machinery and industrial buses. The Bus Health Test capabilities are discussed in a separate section, see here.

Furthermore, the 125 offers the following additional capabilities for tests on industrial machinery:

  • 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.

FlukeView® Software for documenting, archiving and analysis


FlukeView® for Windows® helps you get more out of your ScopeMeter by:

  • Documenting - transfer waveforms, screens and measurement data from the ScopeMeter to a PC. Print or import the data into your report.
  • Add user text to individual ScopeMeter settings – providing guidance to the operator when recalling a set-up.
  • Archiving - create a library of waveforms with your comments for easy reference and comparison. Store complete Replay cycles for analysis of waveform changes. Store complete memory content of the ScopeMeter on your PC for back-up purposes.
  • Waveform Compare – store reference waveforms on the PC, or send a reference back to the ScopeMeter for waveform comparison and “Pass/Fail testing.
  • Analysis - use cursors, perform spectrum analysis or export data to other analysis programs. ScopeMeter test tools are connected to a PC via an optically-isolated RS-232 or USB interface cable.




Oscilloscope Bandwidth
Fluke 125: 40 MHz
Fluke 124: 40 MHz
Fluke 123: 20 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.
Fluke 125/124: ∆T, 1/∆T, V, ∆V, rise- and fall time
Real-time sample rate
  25 MS/s
Equivalent sampling rate
  up to 2.5 GS/s (125, 124) or 1.25 GS/s (123).
Inputs and digitizers
Timebase range
Fluke 125/124: 20 ns - 1 min/div
Fluke 123: 10 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 measurements: 26 (all instruments) On top, Fluke 125 has additional measurement functions for Power (W), VA, VAR and Power Factor (PF) for single phase and balanced-three-phase (delta) power systems.
Harmonics mode
  Fluke 125 has capbility to analyze the harmonics contents of power signals. See below for details.
Maximum record length
  512 min/max pts per input
Fluke 125/124: 20 screens and setups
Fluke 123: 10 screens and setups
Additional Power measurement capabilities (Fluke 125 only)
Measurement types:
 Power Factor (PF)
Power configuration:
  Single phase or balanced three-phase (delta-configuration) mains supply
Voltage measurement
  Channel A; using STL120, voltage probe or direct input
Current measurement
  Channel B, using i400s (included) or other compatible current clamp
Current Clamp or Shunt sensitivity:
  0.1 / 1 / 10 / 100 / 1000 mV/A, 10 mV/mA and 400 mV/A.
Harmonics Mode (Fluke 125 only)
  Converts waveform information into a harmonics display (using FFT processing) which shows the relative amplitudes of the 1st up to the 33rd harmonic
Analyzed waveform:
  Voltage waveform(Ch.A), Current wavefrom (Ch.B) or Power (Ch.A x Ch.B), automatically generated.
Harmonics Frequency range:
  DC up to 33rd harmonic (for fundamental up to 60 Hz);
  DC up to 24th harmonic (for fundamental up to 400 Hz).
  Bargraph showing 1st up to 33rd harmonic and DC; amplitude displayed in % relative to fundamental
  Relative amplitude of individual harmonics;
  THD in %r or %f.
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 on main instrument, 1-year on accessories
Battery Life
  7 hrs using NiMH
RS232/USB Interface
  Optically isolated via optional PM9080 or OC4USB for interfacing

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Fluke 120 series

Fluke 120 series

Fluke 120 Series Industrial ScopeMeter®
Fluke 125: 40 MHz
Fluke 124: 40 MHz
Fluke 123: 20 MHz

Write your review

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