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Fluke 125B/NA/S
Catalog #: 4756068
Industrial ScopeMeter Handheld Oscilloscope with Bus Health Test 40MHz and SCC Kit (North America)

  • Overview
  • Specifications
  • Summary
  • Cases
  • Current Clamps/Probes
  • Accessories

Product Highlights

  • 125B/NA/S Industrial ScopeMeter Handheld Oscilloscope with Bus Health Test 40MHz and SCC Kit (North America)
  • Dual-input digital oscilloscope and multimeter
  • 40 MHz oscilloscope bandwidth
  • Two 5,000-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
  • Li-Ion rechargeable battery, seven-hours operation (with four-hour charge time)

Each Unit Includes

  • Shielded Test Leads with Black Ground Leads
  • Test Lead Black (for Grounding)
  • Hook Clips (red, blue)
  • Banana-to-BNC Adapters (black, x1)
  • USB Angled Adapter
  • WiFi USB Adapter (not for use in all countries)
  • Switch Mode Power Supply, Adapter/Battery Charger
  • Rechargeable Li-ion Battery Pack
  • Soft Carrying Case
  • FlukeView® ScopeMeter® Software for Windows®
  • Magnetic Hanger
  • Screen Protector
  • ISO 9001 Statement of Calibration

 

Fluke 120B Series 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
evels, 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) v((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 O 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 O ±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

 

Multimeters Template
Type Digital
Style Hand-Held
Measures AC V Yes
Measures DC V Yes
Measures AC A No 
Measures DC A No 
True RMS  Yes
Maximum Voltage AC 750 V
Maximum Voltage DC 750 V
Basic Accuracy V DC ±(0.5 % + 5 counts)
Counts  5000 .
Backlight Yes
Manual/Autoranging  Both
Dual Display No
Analog Bargraph on Display No
Decibels Yes
Resistance Yes 
Frequency Yes 
Continuity  Yes
Capacitance Yes 
Temperature No 
Diode Testing Yes
CAT Rating  IV 
CAT Voltage  600 V
Intrinsically Safe  No
Peak Hold No 
Overload Protector No
Kelvin 4-Wire Measurement Capability  No
Wireless Display No
Data Hold  No
Low-Pass Filter  No
Duty Cycle % 2% to 98%
Oscilloscopes/Portable Oscilloscopes Template
Bandwidth  40 Mhz
Channels 2
Sampling Rate  40 MS/S 
Screen Type (Oscilloscopes) TFT/LCD
Isolated Inputs  No
Screen Size 5.7 IN
Color Screen Yes
Rise Time  8.75 ns
Memory  400 MP [megapoints] (409600 kB)
Data Logging  Yes
Unique Features Power measurements (W, VA, VAR, PF, DPF, Hz)
Dual-input digital oscilloscope and multimeter.
Includes SCC Kit.
Warranty 3 YEARS
Calibration Included None
Power Supply Voltage Battery Powered
Safety Approval CE, CSA
Interfaces I/O USB 
Storage Internal Memory, Micro SD
IP Rating  IP51
Product Weight 1.4 KILOS (3.09 LBS)
Battery Type Li-ion
Product Height 2.15 IN
Product Length 10.2 IN
Product Width 5.2 IN
Country of Origin Romania
MEMBER PRICE: INACTIVE
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