Fluke 123B/INT Industrial ScopeMeter 20MHZ, INT

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Fluke 123B/INT Industrial ScopeMeter 20MHz, INT

The compact ScopeMeter® 120B Series, is the rugged oscilloscope solution for industrial electrical and electro-mechanical equipment troubleshooting and maintenance applications. It’s a truly integrated test tool, with oscilloscope, multimeter and high-speed recorder in one easy-to-use instrument. The ScopeMeter 120B Series also integrates with Fluke Connect® mobile app and
FlukeView® for ScopeMeter software to enable further collaboration, data analysis and archiving of critical test information.

The 120B Series Industrial ScopeMeter Test Tools include innovative functions designed to help technicians troubleshoot faster and get the answers they need to keep their systems up and running.
Display waveforms with Connect and View™ trigger and setup technology and automatically view related numerical measurements using Fluke IntellaSet™ technology, all without making
manual measurement adjustments. With Recorder Event Detect capabilities, elusive intermittent events are captured and logged for easy viewing and analysis.

Specifications: Fluke 120B Series Industrial ScopeMeter handheld Oscilloscopes

Oscilloscope mode
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
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
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.
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
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
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
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
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
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
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 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


Key features

  • Dual-input digital oscilloscope and multimeter in a ScopeMeter® test tool
  • Available with a 40 MHz or 20 MHz oscilloscope bandwidth
  • Features Connect-and-View™ trigger simplicity for hands-off operation
  • Includes IntellaSet™ technology to automatically and intelligently adjust numerical readout based on measured signal
  • Provides a dual-input waveform and meter reading recorder for trending data over extended periods

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