Fluke 123B 20 MHz Industrial Scope Meter

£1,951.20

Rating:

Product Comparison Chart	Fluke 123B	Fluke 124B	Fluke 125B
Functions
Full Function Dual Input Scope and Meter	•	•	•
Oscilloscope Bandwidth MHz	20	40	40
Meter and Scope Recorder	•	•	•
Scope Cursor Measurements		•	•
Power and Harmonics Measurements			•
BusHealth			•
Included Accessories
10:1 voltage probe		•	•
i400S AC current clamp			•

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.
Max. input voltage A and B	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,
	Equivalent sampling	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
Sampling rate (for both channels simultaneously)	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
Modbus	RS-485	RS-485/EIA-485
Foundation Fieldbus	H1	61158 type 1, 31.25 kBit
Profibus	DP	EIA-485
Profibus	PA	61158 type 1

Miscellaneous
Display	Type	5.7-inch color active matrix TFT
Display	Resolution	640 x 480 pixels
Waveform Display	Vertical	10 div of 40 pixels
Waveform Display	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)
Mechanical	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
Wireless radio with adapter	Output power	<100 mW
Enclosure protection	IP51, ref: EN/IEC60529
Safety	General	IEC 61010-1: Pollution Degree 2
Safety	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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Description

Fluke 120B Series Industrial ScopeMeter® Hand-Held Oscilloscopes

Simplified testing, more insight and faster electro-mechanical troubleshooting

The Fluke ScopeMeter® 120B Series is a rugged oscilloscope for industrial electrical and electro-mechanical equipment troubleshooting and maintenance.

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.

Fluke 123B Scope Meter Includes:

Fluke 123B 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)
USB Angled Adapter
WiFi USB Adapter*
Switch Mode Power Supply, Adapter/Battery Charger
Rechargeable Li-ion Battery Pack

Fluke 123B/S Scope Meter Includes:

All of the above +
Soft Carrying Case
Magnetic Hanger
FlukeView® ScopeMeter® Software for Windows®
Screen Protector

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.

Dual-input digital oscilloscope and multimeter
40 MHz or 20 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)

Connect-and-View™ triggering foran 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. Fluke's unique Connect-and-View™ 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.

IntellaSet™/AutoReading

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 Vpeak-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.

Industrial equipment needs a reliable power supply to operate properly, use the dual input to obtain key power measurements.

For single phase or 3-phase balanced systems, the dual inputs of the Industrial ScopeMeter® 120B Series can measure ac+dc rms voltage on channel A and ac+dc rms current on channel B. The Fluke 125B can then calculate; frequency, phase angle, active power (kW), reactive power (VA or var), power factor (PF) or displacement power factor (DPF) and can also calculate the power values for a 3-phase system where all phases have equal voltage and currents. This applies to both balanced system and resistive loads.

Harmonics measurements

Harmonics are periodic distortions of voltage, current, or power sine waves. Harmonics in power distribution systems are often caused by non-linear loads such as switched mode dc power supplies and adjustable speed motor drives. Harmonics can cause transformers, conductors, and motors to overheat. In the Harmonics function, the Test Tool measures harmonics to the 51st. Related data such as dc components, THD (Total Harmonic Distortion), and K factor are measured to provide a complete insight in to the electrical state of health of your loads.

Use the comprehensive recorder modes to help find intermittent faults with ease

The toughest faults to find are those that happen only once in a while - intermittent events. They can be caused by bad connections, dust, dirt, corrosion or simply broken wiring or connectors. Other factors, like line outages and sags or the starting and stopping of a motor, can also cause intermittent events resulting in equipment shutdowns. When these events happen, you may not be around to see it. But, your Fluke ScopeMeter® Test Tool will.

You can either plot the minimum and maximum peak measurement values or record the waveform trace. And, with expandable micro SD memory, recording sessions can be done for up to 14 days. This recorder is even more powerful with the addition of Recorder Event Detect, which makes detecting and logging intermittent faults easier than ever. Just set a threshold on a meter reading or scope trace and deviations are tagged as unique events. You no longer need to search through masses of data to pinpoint faults, and can quickly step from one tagged event to the next, while still having access to the full data set

Industrial BusHealth Test verifies electrical signal quality on industrial buses

BusHealth Test analyzes the electrical signals on the industrial bus or network and gives a clear "Good, "Weak or "Bad indication mark for each of the relevant parameters, presented next to the actual measurement value. Measured values are compared to standard values based on the selected bus types (CAN-bus, Profi-bus, Foundation Field, RS-232 and many more), or, unique reference values can be set if different tolerances are required.

The Fluke 125B can validate the quality of the electrical signals as soon as they are passed along the network, without looking at the data content. Additionally, the 125B checks the signal levels and speed, transition times and distortion, and compares these to the appropriate standards to help you find errors such as improper cable connections, bad contacts, incorrect grounding or improper terminators.

One test lead to measure multiple electrical parameters

High frequency waveform, meter, capacitance and resistance measurements as well as continuity checks are all covered by single set of shielded test leads. No time is wasted finding or swapping leads.

FlukeView® ScopeMeter® Software for Windows®

Get more out of your ScopeMeter 120B with FlukeView® Software:

Store instrument's screen copies on the PC, in color
Copy screen images into your reports and documentation
Capture and store waveform data from your ScopeMeter test tool on your PC
Create and archive waveform references for easy comparison
Copy waveform data into your spreadsheet for detailed analysis
Use cursors for parameter measurement
Add user text to instrument setups and send them to the instrument for operator reference and instructions

Fluke Connect mobile app compatibility

Automated industrial machinery is harder than ever to trouble shoot. It's not enough to just know where you have to test, you also have to know what to look for and that can be hard without baseline measurement data or access to subject matter experts. The Fluke Connect® Assets wireless system of software and wireless test tools enables technicians to reduce maintenance costs and increase uptime with accurate equipment records and maintenance data that is easy to interpret, and share.

Download the Fluke Connect^® app

Compare and contrast test point measurement data and trends so you can better understand signal characteristics and changes over time. And, by storing maintenance data on the Fluke Cloud™ you can enable team members to access it from wherever and whenever they need to so you can get advice or approvals in the field and get your systems up and running faster than ever before.

Product Comparison Chart	Fluke 123B	Fluke 124B	Fluke 125B
Full Function Dual Input Scope and Meter	*	*	*
Oscilloscope Bandwidth MHz	20	40	40
Meter and Scope Recorder	*	*	*
Scope Cursor Measurements		*	*
Power and Harmonics Measurements			*
BusHealth			*
10:1 voltage probe		*	*
i400S AC current clamp			*

Features & Specification

More Information

Key Features

Large Backlit Display, Colour Display, 3 instruments in 1, Rechargeable Batteries, 2 channel 20MHz

Product Stock Status

Next Day Delivery (subject to availability)

Manufacturer

Fluke Testers

Short Description

Product Comparison Chart	Fluke 123B	Fluke 124B	Fluke 125B
Functions
Full Function Dual Input Scope and Meter	•	•	•
Oscilloscope Bandwidth MHz	20	40	40
Meter and Scope Recorder	•	•	•
Scope Cursor Measurements		•	•
Power and Harmonics Measurements			•
BusHealth			•
Included Accessories
10:1 voltage probe		•	•
i400S AC current clamp			•

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.
Max. input voltage A and B	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,
	Equivalent sampling	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
Sampling rate (for both channels simultaneously)	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
Modbus	RS-485	RS-485/EIA-485
Foundation Fieldbus	H1	61158 type 1, 31.25 kBit
Profibus	DP	EIA-485
Profibus	PA	61158 type 1

Miscellaneous
Display	Type	5.7-inch color active matrix TFT
Display	Resolution	640 x 480 pixels
Waveform Display	Vertical	10 div of 40 pixels
Waveform Display	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)
Mechanical	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
Wireless radio with adapter	Output power	<100 mW
Enclosure protection	IP51, ref: EN/IEC60529
Safety	General	IEC 61010-1: Pollution Degree 2
Safety	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

Delivery

Updated January 2024

Please note, our cut-off time is 2:00pm

Orders requiring calibration

Whilst we take the greatest care to get all orders dispatched and delivered to you in the stated time frame, orders received PM and requiring calibration may on occasion miss dispatch that day, according to the complexity of the calibration.
Be assured they will ship on the next dispatch this in most cases should not add more than 24 hours to your delivery.

Bank/Public Holidays

Predicted delivery times are based on regular trading days Monday to Friday. Public holidays, bank holidays and weekends are outside the usual scope
of our dispatch and subject to activities/holidays of our carriers and therefore may incur additional days lead time to your order.

*UK Mainland (Revised March 2021)

Service	Price
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value OVER £75.00 ex VAT	FREE
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value UNDER £75.00 ex VAT	£4.95
Next WORKING Day (excludes Saturdays, Sundays and public holidays) – UK Mainland only - Zones A & B - ANY order value - Order by 2:00pm	£7.75
Saturday ANYTIME Delivery - Order by 2:00pm	£9.95

Delivery Surcharges

Because of the high cost of carriage, we regretfully need to apply a surcharge on all deliveries made in the following regions:

Zones A & B - Mainland delivery rates apply.
Zone C - Scottish Highlands (Charges are calculated at the checkout).
Zone D - Outer Hebrides, Orkney Isles, Shetland Isles, Isle of Man, Scilly Isles, and Channel Islands (Charges are calculated at the checkout).
Zone E - Northern Ireland (Charges are calculated at the checkout).
Zone F - Republic of Ireland (Charges are calculated at the checkout).

Offshore Services

All offshore deliveries are a 3-4 day service as standard. This includes Channel Islands, Northern & Southern Ireland, Scottish Islands, Isle of Man and the Scilly Isles.

International delivery

International delivery charges are automatically added to your order at the checkout. For any questions regarding international deliveries please contact us at sales@isswww.co.uk

Export

All export inquiries should be directed to the export division before placement of order.

If no shipping option is available to your selected country please call us FREE on 0800 0224 060 to discuss your requirements.
All stated prices are subject to VAT at the current rate where applicable.
E&OA