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    FLUKE 125B-EU-S Industrial ScopeMeter (40 MHz) + SCC120

    # 125B-EU-S

    • Dual-input digital oscilloscope and multi-meter
    • 40 MHz oscilloscope bandwidth
    • Two 5000-count True RMS digital multi-meters
    • FLUKE
    • 125B-EU-S

    Fluke 125B/S Offers

    It features innovative functions that help technicians troubleshoot faster and obtain the answers they need to keep their systems going. This handheld oscilloscope also allows users to automatically view related numerical measurements due to it’s Fluke IntellaSet™ technology. Additionally, it comes with Recorder Event Detect capabilities, which capture intermittent events and logs them for simple viewing and analysis.



    • Dual-input digital oscilloscope and multimeter
    • 40 MHz oscilloscope bandwidth
    • Two 5000-count True RMS digital multimeters
    • Connect-and-View™ trigger simplicity for hands-off operation
    • IntellaSet™ technology automatically and intelligently adjusts numerical readout based on the measured signal
    • Dual-input waveform and meter reading recorder for trending data over extended periods
    • Recorder Event Detect captures elusive intermittent signals on repetitive waveforms up to 4 kHz
    • Shielded test leads for oscilloscope, resistance and continuity measurements
    • Resistance, continuity, diode and capacitance meter measurements
    • Power measurements (W, VA, VAR, PF, DPF, Hz)
    • Voltage, current and power harmonics
    • Check Industrial networks with BusHealth physical layer tests against defined reference levels
    • Save or recall data and instrument setups
    • Store instrument setups defined by a test sequence for routine maintenance or most often used test procedures
    • External optically isolated USB interface to transfer, archive and analyze scope or meter data
    • Optional WiFi adapter connected to internal USB port to wirelessly transfer information to the PC, laptop or Fluke Connect® mobile app
    • FlukeView® ScopeMeter® Software for Windows®
    • Rugged design to withstand 3g Vibration, 30g shock, and rated IP51 according to EN/IEC60529
    • Highest safety rating in the industry: safety rated for CAT IV 600 V


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

    Oscilloscope users know how difficult triggering can be. Using the wrong settings can lead to unstable waveform captures, and sometimes the wrong measurement data. This instrument’s unique Connect-andView™ triggering technology recognizes signal patterns, and automatically sets up the correct triggering to provide a stable, reliable and repeatable display. Connect-and-View™ triggering is designed to work with virtually any signal, including motor drives and control signals – without adjusting parameters, or even touching a button. Signal changes are instantly recognized and settings are automatically adjusted, providing a stable display even when measuring multiple test points in quick succession.



    The Auto Readings function with Fluke IntellaSet™ technology uses proprietary algorithms to intelligently analyze the measured waveform and automatically displays the most appropriate numerical measurements on screen, so you can get the data you need easier than ever before. As an example, when the measured waveform is a line voltage signal, the Vrms and Hz readings are automatically displayed, whereas if the measured waveform is a square wave, the peak-peak and Hz readings are automatically displayed. Using IntellaSet™ technology in conjunction with Connect-and-View™ automatic triggering you can be sure you’re seeing not only the correct waveform, but the appropriate numerical reading as well. All without touching a button.

    Oscilloscope Mode – Vertical
    Frequency Response – DC Coupled Without probes and test leads (with BB120): DC to 40 MHz (-3 dB)
    With STL120-IV 1:1 shielded test leads: DC to 12.5 MHz (-3 dB)/DC to 20 MHz (-6 dB)
    With VP41 10:1 Probe: DC to 40 MHz (-3 dB)
    Frequency Response – AC Coupled (LF Roll Off) Without probes and test leads: <10 Hz (-3 dB)
    With STL120-IV 1:1 shielded test leads: <10 Hz (-3 dB)
    With VP41 10:1 Probe: <10 Hz (-3 dB)
    Rise Time, Excluding Probes, Test Leads <8.75 ns
    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
    Sensitivity 5 mV to 200 V/div
    Analog Bandwidth Limiter 10 kHz
    Display Modes A, -A, B, -B
    Maximum Input Voltage A and B Direct, with test leads, or with VP41 Probe: 600 Vrms Cat IV, 750 Vrms maximum voltage
    With BB120: 600 Vrms
    Maximum Floating Voltage, From any Terminal to Ground 600 Vrms Cat IV, 750 Vrms up to 400 Hz
    Oscilloscope Mode – Horizontal
    Scope Modes Normal, Single, Roll
    Ranges (Normal) Equivalent sampling: 10 to 500 ns/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 4 GS/s
    Real time sampling 1 µs to 60 s/div: 40 MS/s
    Screen Update Free run, on trigger
    Source A, B
    Sensitivity A and B At DC to 5 MHz: 0.5 divisions or 5 mV
    At 40 MHz: 1.5 divisions
    At 60 MHz: 4 divisions
    Slope Positive, negative
    Advanced Scope Functions
    Display Modes – Normal Captures up to 25 ns glitches and displays analog-like persistence waveform
    Display Modes – Smooth Suppresses noise from a waveform
    Display Modes – Glitch Off Does not capture glitches between samples
    Display Modes – Envelope Records and displays the minimum and maximum of waveforms over time
    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.
    DC Voltage (VDC)
    Ranges 500 mV, 5 V, 50 V, 500 V, 750 V
    Accuracy ±(0.5% +5 counts)
    Common Mode Rejection (CMRR) >100 dB at DC
    >60 dB at 50, 60, or 400 Hz
    Full Scale Reading 5000 counts
    True RMS Voltages (V AC and V AC/DC)
    Ranges 500 mV, 5 V, 50 V, 500 V, 750 V
    Accuracy for 5 to 100% of Range (DC Coupled) DC to 60 Hz (V AC/DC): ±(1% +10 counts)
    1 to 60 Hz (V AC): ±(1% +10 counts)
    Accuracy for 5 to 100% of Range (AC or DC Coupled) 60 Hz to 20 kHz: ±(2.5% +15 counts)
    DC Rejection (Only VAC) >50 dB
    Common Mode Rejection (CMRR) >100 dB at DC
    >60 dB at 50, 60, or 400 Hz
    Full Scale Reading 5000 counts, reading is independent of any signal crest factor
    Modes Max peak, Min peak, or pk-to-pk
    Ranges 500 mV, 5 V, 50 V, 500 V, 2200 V
    Accuracy Accuracy Max peak or Min peak: 5% of full scale
    Accuracy Peak-to-Peak: 10% of full scale
    Full Scale Reading 500 counts
    Frequency (Hz)
    Ranges 1 Hz, 10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz, 10 MHz, and 70 MHz
    Frequency Range 15 Hz (1 Hz) to 50 MHz in continuous autoset
    Accuracy at 1 Hz to 1 MHz ±(0.5% +2 counts)
    Full Scale Reading 10,000 counts
    Maximum Reading 50.00 kRPM
    Accuracy ±(0.5% +2 counts)
    Duty Cycle (PULSE)
    Range 2 to 98%
    Frequency Range 15 Hz (1 Hz) to 30 MHz in continuous autoset
    Pulse Width (PULSE)
    Frequency Range 15 Hz (1 Hz) to 30 MHz 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: 0.1 mV/A, 1 mV/A, 10 mV/A, 100 mV/A, 400 mV/A, 1 V/A, 10 mV/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°F/div (200°C/div)
    Scale Factor 1 mV/°F and 1 mV/°C
    Accuracy As V dc (add temp. probe uncertainty)
    Decibel (dB)
    0 dBV 1 V
    0 dBm (600 Ω/50 Ω) 1 mW referenced to 600 Ω or 50 Ω
    dB on V DC, V AC, or V AC+DC
    Full Scale Reading 1000 counts
    Crest Factor (CREST)
    Range 1 to 10
    Full Scale Reading 90 Counts
    Modes A to B, B to A
    Range 0 to 359°
    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
    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 – (Ω)
    Ranges 500 Ω , 5 kΩ, 50 kΩ, 500 kΩ, 5 MΩ, 30 MΩ
    Accuracy ±(0.6% + 5 counts) 50 Ω ±(2% + 20 counts)
    Full Scale Reading 50 Ω to 5 MΩ at 5000 counts, 30 MΩ at 3000 counts
    Measurement Current 0.5 mA to 50 nA, decreases with increasing ranges
    Open Circuit Voltage <4 V
    Continuity (Cont)
    Beep <(30 Ω ±5 Ω) in 50 Ω range
    Measurement Current 0.5 mA
    Detection of Shorts of ≥1 ms
    Measurement Voltage At 0.5 mA: >2.8 V
    At open circuit: <4 V
    Measurement Current 0.5 mA
    Polarity + on input A, – on COM
    Capacitance (CAP)
    Ranges 50 nF, 500 nF, 5 µF, 50 µF, 500 µF
    Full Scale Reading 5000 counts
    Measurement Current 500 nA to 0.5 mA, 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 1 Vpp for AC signals and 100 mV for DC signals.
    Fixed Decimal Point Activated by using attenuation keys
    Cursor Readout
    Sources A, B
    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)
    Dual Horizontal Lines High, low and peak-peak readout
    Rise or Fall Time Transition time, 0%-level and 100%-level readout (manual or auto leveling; auto leveling only possible in single channel mode)
    Accuracy As oscilloscope accuracy
    Meter Readings
    Measurement Speed Maximum 2 measurement/s
    Record Size (Min, Max, Average) 2 M readings for 1 channel
    Recorded Time Span 2 weeks
    Maximum Number of Events 1024
    Waveform Record
    Maximum Sample Rate 400 K sample/s
    Size Internal Memory 400 M samples Recorded Time
    Span Internal Memory 15 minutes at 500 µs/div
    11 hours at 20 ms/div
    Record Size SD Card 1.5 G samples
    Recorded Time Span SD Card 11 hours at 500 µs/div
    14 days at 20 ms/div
    Maximum number of Events 64
    Power Quality
    Readings Watt, VA, var, PF, DPF, Hz
    Watt, VA, Var Ranges (Auto) 250 W to 250 MW, 625 MW, 1.56 GW
    When Selected: Total (% r) ±(2% + 6 counts)
    When Selected: Fundamental (% f) ±(4% + 4 counts)
    DPF 0.00 to 1.00
    PF 0.00 to 1.00, ±0.04
    Frequency Range 10.0 Hz to 15.0 kHz
    40.0 to 70.0 Hz
    Number of Harmonics DC to 51
    Readings/Cursor Readings (Fundamental 40 to 70 Hz) Vrms /Arms/Watt
    Each harmonic from fundamental maybe selected for individual readings
    BusHealth Tester
    AS-i NEN-EN50295
    CAN ISO-11898
    Interbus S Subtype: RS-422
    Protocol: EIA-422
    Modbus Subtype: RS-232, Protocol: RS-232/EIA-232
    Subtype: RS-485, Protocol: RS-485/EIA-485
    Foundation Fieldbus Subtype: H1
    Protocol: 61158 type 1, 31.25 kBit
    Profibus Subtype: DP, Protocol: EIA-485
    Subtype: PA, Protocol: 61158 type 1
    Display Type: 5.7″ color 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 Adapter BC430
    Input voltage: 10 to 21 V DC
    Power consumption: 5 W typical
    Input connector: 5 mm jack
    Internal: Via Battery Pack BP290
    Battery power: Rechargeable Li-Ion 10.8 V
    Operating time: 7 hours with 50% backlight brightness
    Charging time: 4 hours with test tool off, 7 hours with test tool on
    Allowable ambient temperature: 32 to 104°F (0 to 40°C) 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 32 GB)
    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 Adapter 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.
    General Specifications
    Environmental MIL-PRF-28800F, Class 2
    Temperature Battery Operation: 32 to 104°F (0 to 40°C)
    Power Adapter Operation: 32 to 122°F (0 to 50°C)
    Storage: -4 to 140°F (-20 to 60°C)
    Humidity (Operating) Non-condensing at 32 to 50°F (0 to 10°C)
    95% at 50 to 86°F (10 to 30°C)
    75% at 86 to 104°F (30 to 40°C)
    45% at 104 to 122°F (40 to 50°C)
    Storage Non-condensing at -4 to 140°F (-20 to 60°C)
    Altitude Operating at 10,000′ (3 km): CAT III 600 V
    Operating at 6600′ (2 km): CAT IV 600 V
    Storage: 40,000′ (12 km)
    Wireless Radio with Adapter Frequency Range: 2412 to 2462 MHz
    Output power: <100 mW
    Maximum input voltage input A and B Direct on input or with leads: 600 Vrms CAT IV for derating
    With Banana-to-BNC Adapter BB120: 600 Vrms for derating
    Maximum floating voltage from any terminal to ground: 600 Vrms Cat IV, 750 Vrms up to 400 Hz
    Dimensions 10.2 x 5.2 x 2.15″ (259 x 132 x 55 mm)
    Weight 3.2 lbs (1.4 kg)
    Safety General: IEC 61010-1: Pollution Degree 2
    Measurement: IEC 61010-2-033: CAT IV 600 V/CAT III 750 V
    Enclosure Protection IP51, ref: EN/IEC60529
    • Fluke 125B Hand-Held Oscilloscope
    • Shielded Test Leads with Black Ground Leads
    • Test Lead Black (for Grounding)
    • Hook Clips (red, blue)
    • Banana-to-BNC Adapters (black, x1)
    • 10:1 Voltage Probe
    • i400s AC Current Clamp
    • USB Angled Adapter
    • WiFi USB Adapter*
    • Switch Mode Power Supply, Adapter/Battery Charger
    • Rechargeable Li-ion Battery Pack
    • Soft Carrying Case
    • Magnetic Hanger
    • FlukeView® ScopeMeter® Software for Windows®
    • Screen Protector

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