Fluke 125/003
40 MHz, 2 Ch, 25 MS/s Industrial ScopeMeter with SCC120 Kit
See: 125BNAS

  • Dual-input 40 MHz Bandwidth
  • 25 MS/s real time sampling, 2.5 GS/s equivalent time sampling
  • Two 5,000-count true-rms digital multimeters
  • A dual-input TrendPlot™ recorder
  • Connect-and-View™ trigger simplicity for hands-off operation
  • Shielded test leads for oscilloscope, resistance and continuity measurements
  • Industrial Networks bus health testing
  • Measure harmonics and power, VA, VAR, W, PF
  • Up to seven hours battery operation
  • 600 V CAT III safety certified
  • Optically isolated RS-232 interface
  • Rugged compact case
  • Bus Health Tester
Fluke 125/003S 40 MHz, 2 Ch, 25 MS/s Industrial ScopeMeter with SCC120 KitClick for larger image
Fluke 125/003S Shown

Product Information
Datasheet 380 KB PDF
Manual 2.7 MB PDF
PDF HelpPDF Help
Resistance and Capacitance measurements.

Troubleshooting a network segment starts with checking connectivity, measuring the cable impedance making sure it is not open or shorted. Cable impedance is dependant on network type, for example, Foundation Fieldbus uses a 120 Ohm cable terminated at either end of the segment with 120 Ohms. Also, check capacitance, making sure it is within specification. A good cable is essential for proper electrical signal performance.

Network signal electrical performance.

Checking electrical signal performance requires measuring key parameters of the network signal. The 125/003S includes a Bus Health test mode that is designed to trigger on and capture network signal waveforms. Select a bus type, the ScopeMeter Bus Health mode then runs algorithms to measure key signal parameters like bias voltages, signal low, high and peak-to-peak levels. The bus health mode also measures distortion or signal jitter determining overall signal quality.

Verify signaling meets specification.

The signal parameter measurements are compared to the industry specification, a low and high limit defined by the standard is used to determine if these key parameters are within specification. Display icons are used to clearly indicate which parameters are outside of the industry specification.

Fluctuating or incorrect bias voltages is indicative of grounding or termination issues, while low signal level measurements could mean there is excessive attenuation caused by too long cable runs, too many devices on one segment or simply incorrect network termination. Signal distortion like overshoot is a sign of reflections typically caused by cable imperfections or failing connectors.

Inspecting the signaling for disturbances is simplified with the “eye pattern” display mode. The clearer the center “eye” of the signal display the less distortion and disturbances on the signal. Phase noise and jitter are typical digital signal distortion caused by device receiver transmitter circuits. External electrical interference from high-energy sources such as lighting systems and heavy-duty machinery can be detected by inspecting the eye pattern.

Electrical interference like noise, static discharge and transients can cause network devices to reset, monitoring a segment can capture these events thereby helping to isolate their source.

Once the cabling and signaling parameters are eliminated, network protocol diagnostic tools are used to verify digital protocol performance.

Eliminating cabling and signal quality issues are two critical steps to isolating network performance issues. The Fluke 125/S ScopeMeter includes measurement functions and algorithms to verify the integrity of network digital signaling.
Ordering Information
Model Description Buy Online Price
MFR ID: 2838986
Fluke 125/003S 40 MHz, 2 Ch, 25 MS/s Industrial ScopeMeter with SCC120 Kit Discontinued
See: 125BNAS
Related Products
MFR ID: 2838895
Fluke 125/003 40 MHz, 2 Ch, 25 MS/s Industrial ScopeMeter Discontinued
See: 125BNA
Included Accessories
  • AC120 Alligator Clips
  • BB120 Shielded BNC Adapter
  • PM8907 Line Adapter/Charger
  • STL120 Shielded Test Leads Set
  • BP120 1800 mAh NiMH Battery Pack (Installed)
  • i400s current clamp
  • User's Manual (CD-ROM)
  • C120 Carrying Case
  • OC4USB Optically Isolated RS-232 Adapter/Cable
  • FlukeView for ScopeMeter Windows® software
Optional Accessories
Batteries, Chargers & Adapters
MFR ID: 2544081
Fluke BP120MH 4.8V, 3000 mAh NiMH Rechargeable Battery Pack for 43, 43B, & 123 Buy Now Sale $114.39
(Reg. $129.99)
MFR ID: 614039
Fluke PM8907/808 Power Battery Charger - Universal Buy Now Sale $114.39
(Reg. $129.99)
Cables and Hardware
MFR ID: 935601
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(Reg. $89.99)
Cases and Holsters
MFR ID: 646189
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(Reg. $129.99)
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Current Clamps
MFR ID: 664760
Fluke i200S 200A AC Current Clamp, with BNC to banana adapter Buy Now Sale $224.99
(Reg. $249.99)
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Fiber Optic
MFR ID: 200428
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Pressure and Vacuum
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Test Leads, Probes and Clips
MFR ID: 646163
Fluke AC120 Alligator Clips, (one red, one gray, one black) Buy Now Sale $33.20
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