Free Delivery Over £249*

Next Day Delivery*

60 Day Returns Guarantee

Fluke 125B Industrial ScopeMeter Hand-Held Oscilloscope 40MHz

Fluke
SKU: FLUKE125B-CONF
  • Combines the exciting options of an oscilloscope, multimeter, and high-speed recorder into one easy-to-use tool
  • The 125B is the most advanced of the 120B series, and is able to run power and harmonics tests, as well as bus health tests
  • The ScopeMeter can also be purchased as part of the S kit, which includes a range of accessories for the tool
More Info

Fluke 125B Industrial ScopeMeter Hand-Held Oscilloscope 40MHz

The Fluke 125B Industrial ScopeMeter offers users three tools in one: an oscilloscope, a multimeter, and a high-speed recorder, which allows for the collation and analysis of results with high accuracy. The user is able to troubleshoot with ease, with waveforms displayed that allow for results to be measured and interpreted. In-built Connect-and-View trigger and set up technology allows for this to happen, as the user can collate results through this. The 125B offers more advanced testing options than both the 123B and 124B, with users able to run scope cursor measurements, power and harmonics measurements, as well as bus health tests. You can be certain that the 125B is the right tool for the job.

Bus health testing is designed to indicate 'good', 'weak', or 'bad' readings for the electrical signal quality of industrial buses. The values that are measured are then compared to standard values based on bus type (which are CAN-bus, Profi-bus, Foundation Field, RS-232 and various others). The 125B is also able to check signal level speed, transition times, and distortion to find faults.

Fluke Connect-and-View

If incorrect settings are applied to an oscilloscope, it may result in displaying inaccurate data, posing a significant challenge for industry professionals. Fluke's 'Connect-and-View' technology offers a solution by intelligently identifying signal patterns and configuring appropriate triggers to ensure a stable, dependable, and consistent display. This innovative software is capable of recognizing a wide range of signals, from motor drives to control signals, allowing users to effortlessly enjoy its benefits without the need to manually adjust settings.

Please note: the 125B needs the optional WiFi USB Adaptor, which is available in the 125B Kit option.

Additionally, the 125B features an 'Auto Readings' function powered by IntellaSet technology. This innovative feature automatically showcases the most relevant measurements on the screen, streamlining data retrieval for users. When combined with 'Connect-and-View' auto-triggering, users can effortlessly visualize the correct waveform along with the corresponding accurate reading, further enhancing the device's usability and efficiency.

Identifying intermittent events, which are frequently triggered by issues such as poor connections, dust accumulation, corrosion, or damaged wiring and connectors, can often prove challenging. However, the ScopeMeter excels at detecting these intermittent faults. Equipped with the Fluke 125B, users can plot both minimum and maximum peak measurement values or record waveform traces, with recording sessions extending up to 14 days. Moreover, with the innovative 'Recorder Event Detect' feature, users can effortlessly pinpoint the precise location of the event without the need to sift through extensive amounts of data, streamlining the troubleshooting process effectively.

Fluke 120B Series Comparison Table

  Fluke 123B Fluke 124B Fluke 125B
Full Function Dual Input with Scope and Meter ✔ ✔ ✔
Oscilloscope Bandwidth MHz 20 40 40
Meter and Scope Recorder ✔ ✔ ✔
Scope Cursor Measurements X ✔ ✔
Power and Harmonics Measurements X X ✔
Bus Health X X ✔

Fluke part number: 4755834/4756079

Key Features

  • 20MHz dual-input digital oscilloscope and multimeter in one ScopeMeter tool
  • Features Connect-and-View trigger simplicity which allows for hand-free operation
  • IntellaSet technology which automatically and intelligently adjusts numerical readout based on measured signal
  • Offers a dual-input waveform and meter reading recorder for data
  • Recorder Event Detect captures intermittent faults and allows the user to find them
  • The user can measure frequency, resistance, voltage, continuity, diode, capacitance and more with the multimeter
  • Designed for use on a range of job sites
  • Safety rating of CAT IV 600V
  • Can conduct bus health tests, as well as power and harmonics testing

What's In The Box?

The Fluke 125B Industrial ScopeMeter Hand-Held Oscilloscope is supplied with the following:

  • Fluke 125B ScopeMeter
  • Shielded Test Leads with Black Ground Leads
  • Black Test Lead (For Grounding)
  • Hook Clips (Red and Blue)
  • Banana-to-BNC Adaptors (Black x 1)
  • 10:1 Voltage Probe
  • 1400s AC Current Clamp
  • USB Angled Adaptor
  • WiFi USB Adaptor
  • Switch Mode Power Supply, Adaptor and Battery Charger
  • Rechargeable Lithium Ion Battery Pack

If the user opts for the Kit option, the 125B will be supplied with the above, plus:

  • Soft Carrying Case
  • Magnetic Hanger
  • FlukeView ScopeMeter Software for Windows
  • Screen Protector
Specification

Oscilloscope Mode

Vertical

Frequency Response
  • Without probes and test leads (with BB120) - 123B is dc to 20MHz (-3dB), 124B & 125B is dc to 40MHz (-3dB)
  • With STL120-IV 1:1 shielded test leads - DC to 12.5MHz (-3dB)/ dc to 20MHz (-6dB)
  • With VP41 10:1 Probe - 123B is dc to 20MHz (-3dB), 124B & 125B is dc to 40MHz (-3dB)
Frequency Response - AC Coupled (if roll off)
  • Without probes and test leads - <10Hz (-3dB)
  • With STL120-IV 1:1 shielded test leads - <10Hz (-3dB)
  • With VP41 10:1 Probe - <10Hz (-3dB)
Input Impedance
  • Without probes and test leads - 1 MΩ//20 pF
  • With BB120 - 1 MΩ//24 pF
  • With STL120-IV 1:1 shielded test leads - 1 MΩ//230 pF
  • With VP41 10:1 Probe - 5 MΩ//15.5 pF
Max. input voltage A and B
  • Direct, with test leads, or with VP41 Probe - 600Vrms Cat IV, 750 Vrms maximum voltage
  • With BB120 - 600Vrms
  • Rise time, excluding probes, test leads - 123B is <17.5ns, 124B & 125B is <8.75ns
  • Sensitivity - 5mV to 200 V/div
  • Analogue bandwith limiter - 10kHz
  • Display modes - A, -A, B, -B
  • Max. floating voltage, from any terminal to ground - 600Vrms Cat IV, 750 Vrms up to 400Hz

Horizontal

  • Scope modes - Normal, Single, Roll

    Ranges (normal)

    • Equivalent sampling - 123B is 20ns to 500ns/div, 124B & 125B is 10ns to 500ns/div
    • Real time sampling - 1 μs to 5 s/div
    • Single (real time) - 1 μs to 5 s/div
    • Roll (real time) - 1s to 60 s/div
    Sampling Rate (for both channels simultaneously)
    • Equivalent sampling (repetitive signals) - Up to 4GS/s
    • Real time sampling 1 μs to 60 s/div - 40MS/s

    Trigger

    • Screen update - Free run, on trigger
    • Source - A, B
    • Slope - Positive, negative
    Sensitivity A and B
    • @ DC to 5MHz - 0.5 divisions or 5mV
    • @ 40MHz - 123B is 4 divisions, 124B and 125B is 1.5 divisions
    • @ 60MHz - 123B is N/A, 124B and 125B is 4 divisions

    Advanced Scope Functions

    • Auto set (Connect-and-View) - Continuous fully automatic adjustments of amplitude, time base, trigger levels, trigger gap, and hold-off. Manual override by user adjustment of amplitude, time base, or trigger level.
    Display modes
    • Normal - Captures up to 25ns glitches and displays analogue-like persistance waveform
    • Smooth - Suppresses noise from a waveform
    • Glitch off - Does not capture glitches between samples
    • Envelope - Records and displays the minimum and maximum of waveforms over time

    Dual Input Meter

    • The accuracy of all measurements is within ±(% of reading + number of counts) from 18 °C to 28 °C.
    • Add 0.1x (specific accuracy) for each °C below 18 °C or above 28 °C. For voltage measurements with 10:1 probe, add probe uncertainty +1%. More than one waveform period must be visible on the screen.

    Input A and Input B

    DC voltage (VDC)

    • Ranges - 500mV, 5V, 50V, 500V, 750V
    • Accuracy - ±(0.5% +5 counts)
    • Common mode rejection (CMRR) - >100dB @ dc, >60 dB @ 50, 60, or 400Hz
    • Full scale reading - 5000 counts

    True-rms voltages (V ac and V ac+dc)

    • Ranges - 500mV, 5V, 50V, 500V, 750V
    • DC rejection - >50dB
    • Full scale reading - 5000 counts, reading is independent of any signal crest factor
    • Common mode rejection (CMRR) - >100dB @ dc, >60dB @ 50, 60, or 400Hz
    Accuracy for 5% to 100% of range (DC coupled)
    • DC to 60Hz (V ac+dc) - ±(1% +10 counts)
    • 1Hz to 60Hz (V ac) - ±(1% +10 counts)
    Accuracy for 5% to 100% of range (AC or dc coupled)
    • 60Hz to 20kHz - ±(2.5% +15 counts)

    Peak

    • Modes - Max peak, Min peak, or pk-to-pk
    • Ranges - 500mV, 5V, 50V, 500V, 2200V
    • Full scale reading - 500 counts
    Accuracy
    • Accuracy Max peak or Min peak - 5% of full scale
    • Accuracy Peak-to-Peak - 10% of full scale

    Frequency (Hz)

    • Frequency range - 15Hz (1Hz) to 50MHz in continuous autoset
    • Accuracy @ 1Hz to 1MHz - ±(0.5% +2 counts)
    • Full scale reading - 10,000 counts
    Ranges
    • 123B - 1Hz, 10Hz, 100Hz, 1kHz, 10kHz, 100kHz, 1MHz, 10MHz, and 50MHz
    • 124B & 125B - 1Hz, 10Hz, 100Hz, 1kHz, 10kHz, 100kHz, 1MHz, 10MHz, and 70MHz

    RPM

    • Max reading - 50.00kRPM
    • Accuracy - ±(0.5% +2 counts)

    Duty cycle (PULSE)

    • Range - 2% to 98%
    • Frequency range - 15Hz (1Hz) to 30 MHz in continuous autoset

    Pulse width (PULSE)

    • Frequency range - 15Hz (1Hz) to 30MHz in continuous autoset
    • Full scale reading - 1000 counts

    Amperes (AMP) with current clamp

    • Ranges - same as V dc, V ac, V ac+dc, or PEAK
    • Scale factors - 0.1mV/A, 1mV/A, 10mV/A, 100mV/A, 400mV/A, 1V/A, 10mV/mA
    • Accuracy - Same as V dc, V ac, V ac+dc, or PEAK (add current clamp uncertainty)

    Temperature (TEMP) with optional temperature probe

    • Range - 200°C/div (200°F/div)
    • Scale factor - 1 mV/°C and 1 mV/°F
    • Accuracy - As V dc (add temp. probe uncertainty)

    Decibel (dB)

    • 0dBV - 1V
    • 0dBm (600 Ω /50 Ω) - 1mW referenced to 600Ω or 50Ω
    • dB on - V dc, V ac, or Vac+dc
    • Full scale reading - 1000 counts

    Crest factor (CREST)

    • Range - 1 to 10
    • Full scale reading - 90 Counts

    Phase

    • Modes - A to B, B to A
    • Range - 0 to 359 degrees
    • Resolution - 1 degree

    Power (125B only)

    • Configurations - 1 phase/3 phase 3 conductor balanced loads (3 phase: fundamental component only, AUTOSET mode only)
    • Power factor (PF) - Ratio between watts and VA range, 0.00 to 1.00
    Watt
    • RMS reading of multiplying corresponding samples of input A (volts) and input B (amperes)
    • Full scale reading - 999 counts
    VA
    • Vrms x Arms
    • Full scale reading - 999 counts
    VA reactive (var)
    • √((VA)2-W2)
    • Full scale reading - 999 counts

    Vpwm

    • Purpose - To measure on pulse width modulated signals, like motor drive inverter outputs
    • Principle - Readings show the effective voltage based on the average value of samples over a whole number of periods of the fundamental frequency
    • Accuracy - As Vrms for sinewave signals

    Input A to common

    Ohm (Ω)

    • Accuracy - ±(0.6% + 5 counts) 50 Ω ±(2% + 20 counts)
    • Full scale reading - 50 Ω to 5 MΩ - 5000 counts, 30 MΩ - 3000 counts
    • Measurement current - 0.5mA to 50nA, decreases with increasing ranges
    • Open circuit voltage - <4V
    Ranges
    • 123B & 124B - 500Ω , 5kΩ, 50kΩ, 500kΩ, 5MΩ, 30MΩ
    • 125B - 50Ω, 500Ω , 5kΩ, 50kΩ, 500kΩ, 5MΩ, 30MΩ

    Continuity (Cont)

    • Beep - <(30Ω ±5Ω) in 50Ω range
    • Measurement current - 0.5mA
    • Detection of shorts of - ≥1ms

    Diode

    • Measurement voltage - @0.5mA is >2.8V, @ open circuit is <4V
    • Measurement current - 0.5mA
    • Polarity - + on input A, - on COM

    Capacitance (CAP)

    • Ranges - 50nF, 500nF, 5μF, 50μF, 500μF
    • Full scale reading - 5000 counts
    • Measurement current - 500nA to 0.5mA, increases with increasing ranges

    Advanced Meter Functions

    • Zero Set - Set actual value to reference
    • AutoHold (on A) - Captures and freezes a stable measurement result. Beeps when stable. AutoHold works on the main meter reading, with thresholds of 1Vpp for AC signals and 100mV for DC signals.
    • Fixed decimal point - Activated by using attenuation keys

    Cursor Readout (124B and 125B)

    • Sources - A, B
    • Dual horizontal lines - High, low and peak-peak readout
    • Accuracy - As oscilloscope accuracy
    • Rise or fall time - Transition time, 0%-level and 100%-level readout (manual or auto leveling; auto leveling only possible in single channel mode)
    Single Vertical Line
    • Average, min and max readout
    • Average, min, max and time from start of readout (in ROLL mode; instrument in HOLD)
    • Min, max and time from start of readout (in RECORDER mode; instrument in HOLD)
    • Harmonics values in POWER QUALITY mode
    Dual Vertical Lines
    • Peak-peak, time distance and reciprocal time distance readout
    • Average, min, max and time distance readout (in ROLL mode; instrument in HOLD)

    Recorder

    • The recorder captures meter readings in Meter Recorder mode or continuously captures waveform samples in Scope Recorder mode. The information is stored on internal memory or on optional SD card (with the 125B or 124B).
    • The results are displayed as Chart recorder display that plots a graph of min and max values of Meter measurements over time or as a waveform recorder display that plots all the captured samples.

    Meter Readings

    • Measurement Speed - Maximum 2 measurement/s
    • Record Size (min, max, average) - 2M readings for 1 channel
    • Recorded Time Span - 2 weeks
    • Maximum number of events - 1024

    Waveform Record

    • Maximum sample rate - 400K sample/s
    • Size Internal memory - 400M samples Recorded Time
    • Span internal memory - 15 minutes at 500μs/div, 11 hours at 20 ms/div
    • Record Size SD card - 1.5G samples
    • Recorded Time Span SD card - 11 hours at 500μs/div, 14 days at 20ms/div
    • Maximum number of events - 64

    Power Quality (125B only)

    • Readings - Watt, VA, var, PF, DPF, Hz
    • DPF - 0.00 to 1.00
    • PF - 0.00 to 1.00, ±0.04
    • Frequency range - 10.0Hz to 15.0kHz, 40.0Hz to 70.0Hz
    • Number of Harmonics - DC to 51
    • Readings/Cursor reading (fundamental 40Hz to 70Hz) - Vrms/Arms/Watt, each harmonic from fundamental maybe selected for individual readings
    • Includes frequency of fundamental, phase Angle and K-factor (in Amp and Watt)
    Watt, VA, var ranges (auto)
    • 250W to 250MW, 625MW, 1.56GW
    • When selected: total (% r) - ±(2% + 6 counts)
    • When selected: fundamental (% f) - ±(4% + 4 counts)

    BusHealth Tester (Fluke 125B only) (Subtype/Protocol)

    • AS-i - NEN-EN50295
    • CAN - ISO-11898
    • Interbus S - RS-422/EIA-422
    • Modbus - RS-232/RS-232 & EIA-232, RS-485/RS-485 & EIA485
    • Foundation Fieldbus - H1/61158 type 1, 31.25 kBit
    • Profibus - DP/EIA-485, PA/61158 type 1

    Miscellaneous

    Display
    • Type - 5.7-inch colour active matrix TFT
    • Resolution - 640 x 480 pixels
    Waveform Display
    • Vertical - 10 div of 40 pixels
    • Horizontal - 12 div of 40 pixels
    Power
    • External - Via Power Adaptor BC430
    • Input voltage - 10V DC to 21V DC
    • Power consumption - 5W typical
    • Input connector - 5mm jack
    • Internal - Via Battery Pack BP290
    • Battery power - Rechargeable Li-Ion 10.8V
    • Operating time - 7 hours with 50% backlight brightness
    • Charging time - 4 hours with test tool off, 7 hours with test tool on
    • Allowable ambient temp - 0 to 40°C (32 to 104°F) during charging
    Memory
    • Internal memory can store 20 data sets (screen waveform and setup) - Micro SD card slot with optional SD card (max size of 32GB)
    Mechanical
    • Size - 259 x 132 x 55mm (10.2 x 5.2 x 2.15in)
    • Weight - 1.4kg (3.2lb) including battery pack
    Interface
    • Optically isolated - Transfer screen copies (bitmaps), settings and data
    • USB to PC/Laptop - OC4USB optically isolated USB adapter/cable, (optional), using FlukeView® software for Windows®.
    • Optional WiFi adaptor - Fast transfer of screen copies (bitmaps), settings and data to PC/laptop, tablet, smartphone, etc. A USB port is provided for attaching the WiFi dongle. Do not use the USB port with a cable for safety reasons.

    Environmental

    • Environmental - MIL-PRF-28800F, Class 2
    • Storage - @ -20 to 60°C (-4 to 140°F), Non-condensing
    • Enclosure protection - IP51, ref: EN/IEC60529
    Temperature
    • Battery Operation - 0 to 40°C (32 to 104°F)
    • Power Adaptor Operation - 0 to 50°C (32 to 122°F)
    • Storage - -20 to 60°C (-4 to 140°F)
    Humidity (Operating)
    • @ 0 to 10°C (32 to 50°F) - Non-condensing
    • @ 10 to 30°C (50 to 86°F) - 95%
    • @ 30 to 40°C (86 to 104°F) - 75%
    • @ 40 to 50°C (104 to 122°F) - 45%
    Altitude
    • Operating at 3km (10,000 feet) - CAT III 600V
    • Operating at 2km (6,600 feet) - CAT IV 600 V
    • Storage - 12km (40,000 feet)
    EMC electromagnetic compatibility
    • International - IEC 61326-1: Industrial, CISPR 11: Group 1, Class A
    • Korea (KCC) - Class A Equipment (Industrial Broadcasting & Communication Equipment)
    • USA (FCC) - 47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103.
    Wireless radio with adaptor
    • Frequency range - 2412MHz to 2462MHz
    • Output power - <100mW
    Safety
    • General - IEC 61010-1: Pollution Degree 2
    • Measurement - IEC 61010-2-033: CAT IV 600 V/CAT III 750 V
    Max. input voltage input A and B
    • Direct on input with leads - 600Vrms CAT IV for derating
    • With Banana-to-BNC Adaptor BB120 - 600Vrms for derating
    • Max. floating voltage from any terminal to ground - 600Vrms Cat IV, 750Vrms up to 400Hz