The compact ScopeMeter® 125B Series, is the rugged oscilloscope solution for industrial electrical and electro-mechanical equipment troubleshooting and maintenance applications. It’s a truly integrated test tool, putting the functions of an oscilloscope, multimeter, and high-speed recorder into one, easy-to-use instrument. The ScopeMeter 125B 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.
Not all models are available in all countries. Check with your local Fluke representative.

Voltage and current unbalance:

Check the voltage unbalance at the input terminals of the frequency speed drive so you can ensure the phase unbalance is not too high (> 6-8 %), and that the phase rotation is correct. You can also check the current unbalance, as excessive unbalance may indicate a drive rectifier problem.

Extended harmonic measurements:

Excessive harmonics are not just a threat to your rotating machines but also to other equipment connected to the electrical power system. The MDA-550 provides the ability to discover the harmonics of the motor-drive but can also discover the possible effects of inverter switching electronics. The MDA-550 has three harmonic ranges, 1st to 51st Harmonics, 1 to 9 kHz and 9 kHz to 150 kHz giving the ability to detect any harmonic pollution problems.

One of the interesting aspects of the publication is its emphasis on Predictive Maintenance (PdM). While Chapter 5 defines, explains, and provides comparisons and examples of maintenance program types, the guide devotes an entire chapter (Chapter 6) to PdM. Three of the PdM technologies presented in the guide include thermography, vibration analysis, and performance trending. I'll come back to this.

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 the measured signal
• Provides a dual-input waveform and meter reading recorder for trending data over extended periods.

 

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 the 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)

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

Power (125B only)
Configurations	1 phase / 3 phase 3 conductor balanced loads (3 phase: fundamental component only, AUTO SET mode only)
Power factor (PF)	The 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 the 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; an instrument in HOLD)
	Min, max and time from start of readout (in RECORDER mode; an 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; an 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

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 may be 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

Please Note that Product may differ eg. colour, size from the product Image displayed on website. Kindly check the specifications provided to make better purchase decision.