Fluke 125B/S Handheld Digital Oscilloscope (40 MHz)
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Fluke 125BS Digital Oscilloscope (40 MHz)
The Fluke 125B/S Industrial ScopeMeter® is a robust and versatile handheld oscilloscope tailored for troubleshooting and maintenance applications in industrial electrical and electro-mechanical equipment. This model integrates the functionalities of an oscilloscope, multimeter, and high-speed recorder, providing a comprehensive test tool in a single compact device.
The 125 B/S model is distinguished by its 40 MHz oscilloscope bandwidth and includes advanced features like Connect-and-Viewâ„¢ trigger simplicity, which offers hands-off operation by automatically displaying stable waveforms without the need for manual adjustments. Additionally, it features IntellaSetâ„¢ technology, which intelligently adjusts numerical readouts based on the measured signal, enhancing the efficiency and accuracy of troubleshooting tasks.
Fluke 125 B/S ScopeMeter
This ScopeMeter® also supports the Fluke Connect mobile app and FlukeView® for ScopeMeter software, allowing for enhanced collaboration, data analysis, and archiving of critical test information. It is designed to withstand harsh industrial environments, evidenced by its high safety rating for CAT IV 600 V and a rugged design that can withstand vibration, shock, and is rated IP51 for dust and drip-proof protection. The device operates on a Li-Ion rechargeable battery, ensuring up to seven hours of operation, making it suitable for extended use in the field.
For industrial applications, the fluke 125B/S can perform a variety of measurements including voltage, current, power waveforms, harmonics, resistance, diode, continuity, and capacitance measurements. It is equipped with capabilities for power measurements (W, VA, VAR, PF, DPF, Hz) and harmonics analysis, providing a comprehensive understanding of the electrical health of loads. The model also features an industrial Bus Health Test, verifying electrical signal quality on industrial buses and networks, which is crucial for ensuring the reliability and efficiency of industrial systems.
With its combination of durability, precision, and advanced features, the Fluke 125B/S Industrial ScopeMeter® is well-suited for professionals seeking a reliable tool for industrial maintenance and troubleshooting applications​.
Fluke 125B/S Specifications:
| Oscilloscope mode | ||
| Vertical | ||
| Frequency Response – DC coupled | without probes and measuring lines (with BB120) | 123B: DC to 20 MHz (-3 dB) 124B, 125B: DC to 40 MHz (-3 dB) |
| with shielded 1:1 measuring cable pair STL120-IV | DC to 12.5 MHz (-3 dB) / DC to 20 MHz (-6 dB) | |
| with 10:1 probe VP41 | 123B: DC to 20 MHz (-3 dB) 124B, 125B: DC to 40 MHz (-3 dB) |
|
| Frequency Response – AC coupled (when ROLL mode off) | without probes and measuring lines | <10Hz (-3dB) |
| with shielded 1:1 measuring cable pair STL120-IV | <10Hz (-3dB) | |
| with 10:1 probe VP41 | <10Hz (-3dB) | |
| Rise time, without probes or | 123B <17.5 ns 124B and 125B < 8.75 ns |
|
| Input impedance | without probes and measuring lines | 1MΩ//20pF |
| with BB120 | 1MΩ//24pF | |
| with shielded 1:1 measuring cable pair STL120-IV | 1MΩ//230pF | |
| with 10:1 probe VP41 | 5MΩ//15.5pF | |
| sensitivity | 5 mV to 200 V/div | |
| Analog bandwidth limiter | 10kHz | |
| Display modes | A, -A, B, -B | |
| Max. input voltage A and B | directly, with measuring cables or VP41 probe | CAT IV 600 Veff |
| with BB120 | 600 Veff | |
| Max. floating voltage, from each connection to ground | CAT IV 600 Veff | |
| Horizontal | ||
| Oscilloscope modes | Normal, Single, Roll mode | |
| Areas (Normal) | Sampling of repetitive signals | 123B: 20ns to 500ns/Div, |
| 124B and 125B: 10ns to 500ns/div | ||
| Real-time sampling | 1 µs to 5 s/div | |
| Single (real time) | 1 µs to 5 s/div | |
| Roll mode (real time) | 1 s to 60 s/div | |
| Sample rate (for both inputs simultaneously) | Sampling rate (both channels, repeating signals) | up to 4 GS/s |
| Real-time sampling 1 s to 60 s/div. | 40MS/s | |
| Triggering | ||
| Display update | Free running when triggered | |
| source | AWAY | |
| Sensitivity A and B | at DC up to 5 MHz | 0.5 divisions or 5 mV |
| at 40MHz | 123B: 4 Div | |
| 124B and 125B: 1.5 div | ||
| at 60MHz | 123B: N/A | |
| 124B and 125B: 4 Div | ||
| Flank | Rising, Falling | |
| Additional oscilloscope functions | ||
| Display modes | Normal | Detects glitches (short disturbance pulses) up to 25 ns and displays an analogue-like afterglow signal form |
| smoothing | Removes noise from a waveform | |
| Glitch capture off | Does not capture glitches between sample points | |
| Envelope | Records and displays the minimum and maximum values ​​of waveforms over time | |
| Auto Set (Connect-and-View™) | Constant fully automatic adjustment of amplitude, time base, trigger level, trigger distance and delay time. Manual deactivation by user setting of amplitude, time base or trigger level. | |
Probe accuracy +1%. There must be at least one waveform period visible on the display.
| Dual channel multimeter | ||
| The accuracy of all measurements is between 18 °C and 28 °C within ± (% of the measured value + counting steps of the least significant digit). | ||
| Add 0.1 x (specified accuracy) for each °C below 18°C ​​or above 28°C. For voltage measurements with a 10:1 probe, add them together |
| Entrance A and Entrance B | ||
| DC voltage (VDC) | ||
| areas | 500mV, 5V, 50V, 500V, 750V | |
| accuracy | ±(0.5% + 5) | |
| Common Mode Rejection (CMRR) | >100 dB at DC, >60 dB at 50, 60 or 400 Hz | |
| Display scope | 5,000 counting steps | |
| True RMS voltage values ​​(V AC ​​and V AC+DC) | ||
| areas | 500mV, 5V, 50V, 500V, 750V | |
| Accuracy for 5% to 100% of range (DC coupled) | DC to 60 Hz (V AC+DC) | ±(1% + 10) |
| 1Hz to 60Hz (VAC) | ±(1% + 10) | |
| Accuracy for 5% to 100% of range (AC or DC coupled) | 60Hz to 20kHz | ±(2.5% + 15) |
| DC suppression (VAC only) | >50dB | |
| Common Mode Rejection (CMRR) | >100 dB at DC | |
| >60 dB at 50, 60, or 400 Hz | ||
| Display scope | 5000 counting steps, measured value is independent of the crest factor. | |
| peak value | ||
| Display types | Max Peak, Min Peak, or Peak to Peak | |
| areas | 500mV, 5V, 50V, 500V, 2200V | |
| accuracy | Max Peak or Min Peak | 5% of the range end value |
| Accuracy peak to peak | 10% of the range end value | |
| Display scope | 500 counting steps | |
| Frequency (Hz) | ||
| areas | 123B: 1Hz, 10Hz, 100Hz, 1kHz, 10kHz, 100kHz, 1MHz, 10MHz, and 50MHz | |
| 124B and 125B: 1Hz, 10Hz, 100Hz, 1kHz, 10kHz, 100kHz, 1MHz, 10MHz and 70MHz | ||
| Frequency range | 15 Hz (1 Hz) to 50 MHz with continuous automatic adjustment | |
| Accuracy at 1 Hz to 1 MHz | ±(0.5% + 2) | |
| Display scope | Display size up to 10,000 | |
| revolutions/min. (RPM or min-1) | ||
| Maximum value | 50,000 rpm | |
| accuracy | ±(0.5% + 2) | |
| duty cycle | ||
| Area | 2% to 98% | |
| Frequency range | 15 Hz (1 Hz) to 30 MHz with continuous automatic adjustment | |
| Pulse width | ||
| Frequency range | 15 Hz (1 Hz) to 30 MHz with continuous automatic adjustment | |
| Display scope | 1000 counting steps | |
| Current strength | ||
| with current clamp | areas | such as V DC, V AC, V AC+DC or peak value |
| Scaling factors | 0.1mV/A, 1mV/A, 10mV/A, 100mV/A, 400mV/A, 1V/A, 10mV/mA | |
| accuracy | as with V DC, V AC, V AC+DC, or PEAK (the inaccuracy of the current clamp must be added) | |
| Temperature with optional temperature sensor | ||
| Area | 200°C/div (200°F/div) | |
| Scaling factor | 1mV/°C and 1mV/°F | |
| accuracy | as with V DC (the inaccuracy of the temperature sensor must be added) | |
| Decibel (dB) | ||
| 0dBV | 1V | |
| 0dBm (600Ω /50Ω) | 1 mW related to 600 Ω or 50 Ω | |
| dB for | V DC, V AC or V AC+DC | |
| Display scope | 1000 counting steps | |
| Crest factor | ||
| Area | 1 to 10 | |
| Display scope | 90 counting steps | |
| phase | ||
| Types of measurement | A to B, B to A | |
| Area | 0 to 359 degrees | |
| resolution | 1 degree | |
| Power (125B only) | ||
| Configurations | 1-phase or 3-phase with symmetrical load (3-phase: only fundamental component, only AUTOSET operation) | |
| Power factor (PF) | Ratio between active power and apparent power: 0.00 to 1.00 | |
| Active power (watts) | RMS measurements of corresponding samples from input A (voltage) and input B (current) | |
| Display scope | 999 counting steps | |
| Apparent power (VA) | V eff x A eff | |
| Display scope | 999 counting steps | |
| Reactive power (VAR) | √((VA)²-W²) | |
| Display scope | 999 counting steps | |
| Vpwm | ||
| Purpose | For measuring pulse width modulated signals, e.g. B. at the outputs of frequency converters | |
| principle | Measurements show the effective voltage based on the average of sample points over a range of periods of the fundamental frequency | |
| accuracy | as with Veff for sine signals | |
| Entrance A | ||
| Resistance (Ω) | ||
| areas | 123B and 124B | 500Ω, 5kΩ, 50kΩ, 500kΩ, 5MΩ, 30MΩ |
| 125B | 50Ω, 500Ω, 5kΩ, 50kΩ, 500kΩ, 5MΩ, 30MΩ | |
| accuracy | ± (0.6% + 5), in the range 50 Ω ±(2% + 20) | |
| Display scope | 50 Ω to 5 MΩ – 5000 counts, 30 MΩ – 3000 counts | |
| measuring current | 0.5 mA to 50 nA, decreasing with larger ranges | |
| Open circuit voltage | <4V | |
| Continuity test | ||
| Acoustic signal | <(30 Ω ± 5 Ω) in the 50 Ω range | |
| measuring current | 0.5mA | |
| Detection of short circuits | ≥1 ms | |
| Diode test | ||
| Measuring voltage: | at 0.5 mA | >2.8V |
| at idle | <4V | |
| measuring current | 0.5mA | |
| polarity | + at input A, – at COM | |
| capacity | ||
| areas | 50nF, 500nF, 5μF, 50μF, 500μF | |
| Display scope | 5,000 counting steps | |
| measuring current | 500 nA to 0.5 mA, increasing with larger ranges | |
| Advanced multimeter functions | ||
| Zero Set | Setting the actual value as a reference value | |
| AutoHold (at A) | Captures a stable measurement result and fixes it on the display. If the measurement result is stable, an acoustic signal sounds. The AutoHold function affects the main measurement display, with thresholds of 1 Vpp for AC signals and 100 mV for DC signals. | |
| Fixed decimal point | Activated by pressing the attenuator buttons | |
only possible in single-channel mode)
| Cursor display (124B and 125B) | ||
| Sources | AWAY | |
| Single vertical line | Average, minimum and maximum value display | |
| Average, minimum and maximum values ​​as well as time since display start (in ROLL mode; measuring device in HOLD mode) | ||
| Minimum and maximum value as well as time since display start (in RECORDER mode; measuring device in HOLD mode) | ||
| Harmonic values ​​in POWER QUALITY mode. | ||
| Two vertical lines | Display of peak-to-peak values, time interval and reciprocal time interval | |
| Display of mean, minimum and maximum values ​​as well as time interval (in ROLL mode; measuring device in HOLD mode) | ||
| Two horizontal lines | Display high, low and peak-to-peak values | |
| Rise or fall time | Transition time, 0% and 100% level (manual or automatic level adjustment; automatic level adjustment | |
| accuracy | See Oscilloscope Accuracy | |
| recorder | ||
| The recorder captures measured values ​​in multimeter recorder mode or continuously captures sampling points of the waveforms in oscilloscope recorder mode. The information is stored in internal memory or on an optional SD card (on the 125B or 124B). | ||
| The results are displayed as a recorder plotting a graph of minimum and maximum values ​​of measurements over time, or as a waveform display showing all sample points acquired. | ||
| Measurements | ||
| Measuring speed | Maximum 2 measurements/s | |
| Record size (min., max., average) | 2 million measured values ​​for 1 channel | |
| Recording period | 2 weeks | |
| Maximum number of events | 1024 | |
| Waveform recording | ||
| Maximum sampling rate | 400,000 sampling points/s | |
| Recording space internal memory | 400 million sampling points | |
| Recording period internal memory | 15 minutes at 500 μs/div 11 hours at 20 ms/div |
|
| Recording space on the SD card | 1.5 billion sample points | |
| Recording period SD card | 11 hours at 500 μs/div 14 days at 20 ms/div |
|
| Maximum number of events | 64 | |
(Fundamental oscillation 40 Hz to 70 Hz)
| Power quality (125B only) | ||
| Metrics | Active Power (W), Apparent Power (VA), Reactive Power (VAR), Power Factor, Shift Power Factor, Hz | |
| Ranges for W, VA, VAR (Auto) | 250W to 250MW, 625MW, 1.56GW | |
| if selected: Total (% r) | ±(2% + 6) | |
| when selected: fundamental oscillation (% f) | ±(4% + 4) | |
| Displacement power factor (DPF) | 0.00 to 1.00 | |
| Power factor (PF) | 0.00 to 1.00, ±0.04 | |
| Frequency range | 10.0Hz to 15.0kHz 40.0Hz to 70.0Hz |
|
| Number of harmonics | DC up to 51st harmonic | |
| Measured values/cursor display | Veff, Aeff, Watt | Each harmonic of a fundamental can be selected for individual display |
| Includes the frequency of the fundamental wave, the phase angle and the harmonic distortion (in A and W) | ||
| Testing physical parameters of industrial bus systems (Fluke 125B only) | ||
| Type | subtype | protocol |
| AS-i | NEN-EN 50295 | |
| 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 |
| P.A | 61158, type 1 | |
7 hours with meter on (screen waveform and setting) (maximum size: 32 GB)
for Windows® (both optional)
| Other specifications | ||
| Screen | Type | 14.5 cm (5.7″) active matrix color TFT |
| resolution | 640×480 pixels | |
| Waveform display | Vertical | 10 div. x 40 pixels |
| Horizontal | 12 Div. x 40 pixels | |
| Power supply | External | Via power supply BC430 |
| Input voltage | 10V DC to 21V DC | |
| Energy intake | 5W typical | |
| Input port | 5mm | |
| Internal | About battery pack BP290 | |
| Powered by battery | Li-ion battery 10.8 V | |
| Operating time | 7 hours at 50% backlight brightness | |
| Charging time | 4 hours with the meter switched off, | |
| Permissible ambient temperature | 0 to 40°C during charging | |
| Storage | Internal memory can store 20 records | MicroSD card, optional |
| Mechanical information | Dimensions | 259x132x55mm |
| Weight | 1.4 kg, including battery pack | |
| interface | Optically isolated | Transferring screenshots (bitmaps), settings and data |
| Via USB to PC | Optically isolated USB cable OC4USB, uses FlukeView® software | |
| WLAN adapter (optional) | Quick transfer of screen copies (bitmaps), settings and data to PC/notebook, tablet, smartphone, etc. There is a USB port for connecting the WLAN dongle. For safety reasons, do not use this USB port with a cable. | |
Group 1, Class AIV, 750 Vrms up to 400 Hz
| Environmental conditions | ||
| Environmental conditions | MIL-PRF-28800F, Class 2 | |
| temperature | Battery operation | 0 to 40°C |
| Power supply operation | 0 to 50°C | |
| Storage at | -20 to 60°C | |
| Humidity (operation) | at 0 to 10 °C | Not condensing |
| at 10 to 30 °C | 95% | |
| at 30 to 40 °C | 75% | |
| at 40 to 50 °C | 45% | |
| Storage at | at -20 to 60 °C | Not condensing |
| Height | Operating at 3,000 m | CAT III 600V |
| Operating at 2,000 m | CAT IV 600V | |
| storage | 12,000 m | |
| Electromagnetic compatibility (EMC) | International | IEC 61326-1: Industrial, CISPR 11: |
| Korea (KCC) | Class A Equipment (Industrial Broadcasting and Communications Equipment) | |
| United States (FCC) | 47 CFR 15, Subpart B. This product is exempt under clause 15.103. | |
| Wireless radio transmission with WLAN adapter | Frequency range | 2412MHz to 2462MHz |
| Output power | <100mW | |
| IP protection rating of the housing | IP 51, according to EN/IEC 60529 | |
| Security | Generally | IEC 61010-1: Pollution degree 2 |
| Measurements | IEC 61010-2-033: CAT IV 600V / CAT III 750V | |
| Max. input voltage input A and B | Directly at the input or with measuring lines | 600 Vrms CAT IV for load reduction (derating) |
| With banana plug to BNC adapter BB120 | 600 Vrms for load reduction (derating) | |
| Maximum floating voltage from each connection to ground | 600 Vrms CAT | |
Include:
- Fluke 125B portable oscilloscope
- Shielded test leads with black ground leads
- Test lead, black (for grounding)
- Hook clamps (red, blue)
- Banana plug to BNC adapter (black, 1 piece)
- 10:1 voltage probe
- AC current clamp i400S
- USB angle adapter
- WiFi USB adapter*
- Switching power supply, adapter/battery charger
- Li-ion battery pack
- Padded carry bag
- Magnetic hanging device
- ScopeMeter® software FlukeView® for Windows®
- Protective film
Datasheet
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