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Oscilloscopes & Function / Waveform Instruments
Handheld Digital Oscilloscopes
Fluke 125B 2-Channel ScopeMeter Handheld Oscilloscope - 40MHz
Note: there are two versions of the Fluke 125B ScopeMeter available, the Standard Kit and the 'S' Kit.
Both kits have the same functionality. The only difference is that the 'S' kit includes a soft carrying case, magnetic hanger, screen protector and a copy of Fluke's ScopeMeter software.
Please also note that the standard image shown above shows the Standard kit. An additional image for the 'S' kit can also be found by scrolling through the available images.
This is the Fluke 125B, the most powerful handheld oscilloscope available in Fluke's 120B ScopeMeter series.
Boasting a number of improved features compared to its sister models the 123B and 124B, the 125B handheld oscilloscope is designed to give professional technicians all of the tools they'll need to carry out comprehensive diagnostics on a wide variety of equipment and applications.
Fluke 120B Series Industrial ScopeMeter® Handheld Oscilloscope Overview
The 125B is actually three tools in one; it's a powerful, dual channel digital oscilloscope with 40MHz bandwidth; a dedicated digital multimeter with a wide range of highly accurate measurement functions and a powerful recorder, allowing you to catalogue all results and analyse them later (requires optional Fluke ScopeMeter software or access to the Fluke Connect app).
New to this model are the ability to carry out power and harmonics measurements, plus a special bus health mode. The industrial bus health test is designed to verify the electrical signal quality of industrial buses, giving you clear 'good', 'weak' or 'bad' indication for all relevant parameters. Measured values are compared to standard values based on bus type (CAN-bus, Profi-bus, Foundation Field, RS-232 and various others), with the ability to configure tolerance to cater for a wider variety of buses. The 125B can also be used to check signal level speed, transition times and distortion to locate and fix cable connections, bad contacts, incorrect grounding or improper terminators.
With Fluke's powerful recorder, the 125B ScopeMeter is your essential tool for logging intermittent faults that would otherwise be almost impossible to trace. As standard the Fluke 125B comes with fully expandable micro SD card memory, allowing it to be used for a total of up to 14 days to log line outages, sags and much more to detect these faults and allow you to fix them.
Recording Data with the Fluke 125B
With the built-in recorder, all of your waveforms and measurement functions are stored, ready for later analysis.
All data can be seamelessly transferred to PC via USB connection and interacted with further using Fluke's ScopeMeter software (included in the 'S' kit - available separately for the normal kit).
If you don't want to use the software, how about using your phone instead?
The 125B ScopeMeter is Fluke Connect enabled (requires optional WiFi adapter); this allows the ScopeMeter to interface wirelessly with your smartphone or tablet running the Fluke Connect app! With Fluke connect, you can transfer results, share them with others, compare and contrast measurement data, upload to the Fluke Cloud and much, much more.
The Fluke Connect™ Condition Monitoring Software & App
Fluke 125B ScopeMeter Key Features
- Dual-input digital oscilloscope and digital multimeter
- 40MHz bandwidth
- 2 x 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 measured signal
- Dual-input waveform and meter recording for trending data over extended periods
- Recorder Event Detect captures elusive intermittent signals on reptitive waveforms up to 4KHz
- Powerful measurement functionality: voltage, current and power waveforms with numerical values including harmonics, resistance, diode, continuity and capacitance measurements
- Use the Fluke Connect app to view directly on a compatible smartphone or tablet
- Shielded test leads for oscilloscope, resistande and continuity measurements,
- Power measurements include W, VA, VAR, PF, DPF and Hz
- Check industrial networks with the BusHealth physical layer testing mode
- Save and recall data and instrument setups
- Store instrument setups defined by a test sequence for routine maintenance or most often used test procedures
- Externally optically isolated USB interface to transfer, archive and analyse scope or meter data
- WiFi adapter connected to internal USB port to wirelessly transfer data to PC, laptop or Fluke Connect mobile app
- Powerful Fluke ScopeMeter software for Windows available for further analysis of measurement results
- Rugged design made to withstand 3g vibration, 30g shock and IP51 rated according to EN/IEC60529
- Highest safety rating in the industry: CAT IV 600V
- Powered by lithium ion rechargeable batteries with seven hour average battery life
What's Included?
This first set of items are included in both the Standard and S Kit versions of this product.
- Fluke 125B ScopeMeter
- Shielded Test Leads with Black Ground Leads
- Test Lead (Black) - For Grounding
- Hook Clips (Red/Blue)
- Banana-to-BNC Adapters (Black)
- 10:1 Voltage Probe
- i400s AC Current Clamp
- USB Angled Adapter
- WiFi USB Adapter
- Switch Mode Power Supply, Adapter/Battery Charger
- Rechargeable Lithium Ion Battery Pack
These items are only included in the S kit.
- Soft Carrying Case
- Magnetic Hanger
- FlukeView ScopeMeter Software for Windows
- Screen Protector
Optional Accessories
- STL120-IV Shielded Test Lead Set 600 V CAT IV
- HC120-II Set of 2 hook clips
- BB120-II Set of 2 banana to BNC adapter
- VPS41 Voltage probe set 40MHz 600 V CAT IV
- C120B Soft Carrying Case For 120B Series
- SP120B Screen Protector For 120B Series
- SCC120B Accessory Kit 120B Series
- OC4USB Fluke OC4USB USB Interface Cable
- Fluke 80i 110s Fluke 80i-110s AC/DC CurrentClamp
- Fluke i1000s Fluke i1000s AC Current Probe
- Fluke i1010 Fluke i1010 AC/DC Current Clamp
- Fluke i200s Fluke i200s AC Current Clamp
- Fluke-i3000s Fluke i3000s AC Current Clamp
- Fluke i3000s Flex 24 Fluke i3000s Flex-24 AC Current Clamp, 610 mm (24 in.)
- Fluke i3000s Flex 36 Fluke i3000s Flex-36 AC Current Clamp, 915 mm (36 in.)
- Fluke i30s Fluke i30s AC/DC Current Clamp
- Fluke-i310s Fluke i310s Current Probe
- Fluke i400s Fluke i400s AC Current Clamp
- Fluke i410 Fluke i410 AC/DC Current Clamp
- Fluke i5S Fluke i5S AC Current Clamp
Fluke 120B Series Technical Specifications
| Oscilloscope mode | ||
| Vertical | ||
| Frequency response - dc coupled | Without probes and test leads (with BB120) | 123B: dc to 20 MHz (-3 dB) 124B and 125B: 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 | 123B: dc to 20MHz (-3 dB) 124B and 125B: 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 |
123B <17.5 ns 124B and 125B <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 | |
| Max. 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 | |
| Max. floating voltage, from any terminal to ground | 600 Vrms Cat IV, 750 Vrms up to 400Hz | |
| Horizontal | ||
| Scope modes | Normal, Single, Roll | |
| Ranges (normal) | Equivalent sampling | 123B: 20 ns to 500 ns/div, |
| 124B and 125B: 10 ns 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 | |
| Trigger | ||
| Screen update | Free run, on trigger | |
| Source | A, B | |
| Sensitivity A and B | @ DC to 5 MHz | 0.5 divisions or 5 mV |
| @ 40 MHz | 123B: 4 divisions | |
| 124B and 125B: 1.5 divisions | ||
| @ 60 MHz | 123B: N/A | |
| 124B and 125B: 4 divisions | ||
| Slope | Positive, negative | |
| Advanced scope functions | ||
| Display modes | Normal | Captures up to 25 ns glitches and displays analog-like persistence 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 | |
| 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. | |
| 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 | 500 mV, 5 V, 50 V, 500 V, 750 V | |
| Accuracy | ±(0.5% +5 counts) | |
| Common mode rejection (CMRR) | >100 dB @ dc, >60 dB @ 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 Hz 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 @ dc | |
| >60 dB @ 50, 60, or 400 Hz | ||
| Full scale reading | 5000 counts, reading is independent of any signal crest factor. | |
| Peak | ||
| 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 | 123B: 1 Hz, 10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz,1 MHz, 10 MHz, and 50 MHz | |
| 124B and 125B: 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 @1 Hz to 1 MHz | ±(0.5% +2 counts) | |
| Full scale reading | 10,000 counts | |
| RPM | ||
| Max 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 °C/div (200 °F/div) | |
| Scale factor | 1 mV/°C and 1 mV/°F | |
| 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 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) | ||
| Ranges | 123B and 124B | 500 Ω , 5 kΩ, 50 kΩ, 500 kΩ, 5 MΩ, 30 MΩ |
| 125B | 50 Ω, 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 - 5000 counts, 30 MΩ - 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 | |
| Diode | ||
| Measurement voltage | @0.5 mA | >2.8 V |
| @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 (124B and 125B) | ||
| 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 | |
| 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) | 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 (125B only) | ||
| 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 Hz to 70.0 Hz |
|
| Number of Harmonics | DC to 51 | |
| Readings / Cursor readings (fundamental 40 Hz to 70 Hz) |
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) | ||
| BusHealth tester (Fluke 125B only) | ||
| Type | 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/EIA-485 | |
| Foundation Fieldbus | H1 | 61158 type 1, 31.25 kBit |
| Profibus | DP | EIA-485 |
| PA | 61158 type 1 | |
| Miscellaneous | ||
| Display | Type | 5.7-inch 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 V DC 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 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 32 GB) |
| Mechanical | Size | 259 x 132 x 55 mm (10.2 x 5.2 x 2.15 in) |
| Weight | 1.4 kg (3.2 lb) 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 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. | |
| Environmental | ||
| Environmental | MIL-PRF-28800F, Class 2 | |
| Temperature | Battery Operation | 0 to 40 °C (32 to 104 °F) |
| Power Adapter 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% | |
| Storage | @ -20 to 60 °C (-4 to 140 °F) | Non-condensing |
| Altitude | Operating at 3 km (10,000 feet) | CAT III 600 V |
| Operating at 2 km (6,600 feet) | CAT IV 600 V | |
| Storage | 12 km (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 adapter | Frequency range | 2412 MHz to 2462 MHz |
| Output power | <100 mW | |
| Enclosure protection | IP51, ref: EN/IEC60529 | |
| 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 or with leads | 600 Vrms CAT IV for derating |
| With Banana-to-BNC Adapter BB120 | 600 Vrms for derating | |
| Max. floating voltage from any terminal to ground | 600 Vrms Cat IV, 750 Vrms up to 400 Hz | |
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Additional Information
| SKU | FLUKE-125B |
|---|---|
| Manufacturer Part Code | 4755834 |
