Measure, Scope and Activate Circuits in 9–30 V Electrical Systems
The B550 combines a multimeter mode, an oscilloscope mode, frequency testing, an adjustable 0–5 V output and component activation in one probe-style circuit tester for 9 V to 30 V systems, with current overload protection.
- Multimeter + Scope Modes
- Component Activation
- 0–5 V Adjustable Output
- Frequency Test
- Built-In Flashlight
Key Features
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Multimeter Mode
DC voltage with maximum and minimum readings, plus resistance and diode tests to find components damaged by short circuits.
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Oscilloscope Mode
Displays the voltage, frequency and duty cycle of the tested component as a curve.
-
Component Activation
Outputs the drive waveform needed to activate components such as lights, motors and other onboard electronic devices.
-
Adjustable 0–5 V Output
Set any output voltage between 0 and 5 V to check the wiring of the component under test; the tool alarms if the output differs from the set value by more than 0.1 V.
-
Flashlight Design
Lights the test point so you can complete circuit testing in dark areas.
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Wide Application
Diagnoses circuit issues on cars, trucks, SUVs, motorcycles, boats, excavators and trailers.
Highlights
Multimeter Screens
Voltage with min/max, resistance and diode/continuity readings.
Scope Mode
See the signal waveform along with its frequency and duty cycle.
Activate a Component
Drive a bulb or motor directly to confirm it works.
B550 vs B530
| B550 | B530 | |
|---|---|---|
| Multimeter mode | Yes | No |
| Frequency test | Yes | No |
| Oscilloscope mode | Yes | No |
| 0–5 V power supply | Yes | No |
| Battery support | 12 V / 24 V | 12 V / 24 V |
| Extension cable | 10 m | 10 m |
What’s in the Box
- B550 main unit
- Battery hookup clips
- Extension cable
- Extension connection line
- Probe adapter
- Probe tip
- USB cable
- Storage bag
- User manual
Setup and operation: B550 user manual (PDF).
Good to Know
Caution
- Keep clothing, hair, hands, tools and test equipment away from operating or hot equipment.
- Take special care near the ignition coil, distributor cap, ignition wires and spark plugs, which carry dangerously high voltage when the engine is running.
- Keep a fire extinguisher at hand when working with gasoline, chemicals or electrical equipment.
- Before testing, put the transmission in Park (automatic) or Neutral (manual) and set the handbrake.
- Do not connect or disconnect test equipment while the ignition is on or the engine is running.
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