Autool | SKU: DM109

Autool DM109 | Circuit Tester

Name: Autool DM109 | Circuit Tester
Brand: Autool
SKU: DM109
Price: 212.95 EUR
Availability: InStock

€212,95 incl.

€175,99 excl.

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The Autool DM109 is a circuit tester that combines a multimeter, a simple oscilloscope and component driving in one device. You power it from the vehicle battery and it works on systems of 9 to 72 V, from passenger cars to trucks and electric machinery.

With the DM109 you check wiring and components without dismantling them: Voltage and polarity, continuity, poor earth, and short circuits. You directly drive a relay, injector or actuator, and with a 0-5 V signal you can simulate a sensor to see how the control unit responds.

HIGHLIGHTS

✔Wide voltage range — Works on 12, 24, 36, 48 and 72 V systems.

✔Three drive modes — Direct, PWM and pulse, for relays, injectors and actuators.

✔Signal simulation — 0 to 5 V to simulate a sensor.

✔Protected — 20 A fuse plus a circuit breaker in the event of a short circuit or overload.

POINTS TO NOTE

✕Current up to 18 A — Continuous maximum of 18 A; heavier loads cannot be run through it.

✕Simple scope — Shows the signal waveform, but does not replace a multi-channel workshop oscilloscope.

✕Driving without a plan — Powering a component directly without a diagram can damage a control unit.

✕Updates via PC — You install new firmware via USB-C from a computer.

Applications and functions

Using the power terminals, you connect the DM109 to the battery. With the measuring probe you trace the wiring; the device automatically detects whether you are measuring voltage or resistance and indicates the polarity with a red or green LED and a buzzer.

The Autool DM109 supports the following functions:

Multimeter: Voltage, current, resistance, continuity, diode, frequency with duty cycle and temperature.
Oscilloscope: Signal waveform of sensors and actuators over time, including for an intermittent fault.
Driving components: Relays, injectors and actuators directly, with PWM or in pulses.
Signal simulation: 0 to 5 V to replace a sensor signal.
Fault finding: Polarity, continuity, poor earth, open and closed circuit and short circuit.
Lighting: LED lamp for dark areas.

What you see on the display

Measured value: Voltage with a resolution of 0.001 V, current with minimum and maximum.
Waveform: The signal as a graph in the oscilloscope function.
Status: Polarity and the selected drive mode.

How to use it

Power supply: Connect the terminals to the vehicle battery.
Measuring: Touch the circuit with the measuring probe; the DM109 automatically selects voltage or resistance.
Driving: Select direct, PWM or pulse and activate the component.
Assessing: Read the value or waveform and compare it with the diagram.

Special functions and capabilities

What sets the DM109 apart from a standard circuit tester:

Signal simulation: Simulate a sensor signal with 0 to 5 V to see how the control unit responds.
Three drive modes: Drive relays, injectors and actuators directly, with PWM or in pulses.
Polarity detection: A red or green LED and a buzzer show the polarity immediately.
Protection: 20 A fuse plus a circuit breaker in the event of a short circuit or overload.
Firmware updates: New software via USB-C from a computer.
Work lamp: LED lamp for dark areas.

Package contents

1x Autool DM109 circuit tester

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Good to know: Use signal simulation to determine whether a fault lies in the sensor or in the wiring: if the control unit responds to the simulated signal, the wiring to the control unit is in order.

Technical specifications

General

The brand that manufactures the tester.Brand: Autool
What type of device it is. A circuit tester checks current and earth; a wire tracer locates cables and short circuits.Type of tester: Circuit tester

Measuring

Whether the tester can display a signal as a graph. This reveals faults a standard measurement may miss.Oscilloscope: Yes

Test functions

Shows whether a connection is positive or negative.Polarity check: Yes

Display and controls

The screen size, measured corner to corner. A larger screen is easier to read.Screen diagonal: 2.8 inches
A built-in light to help you see what you are doing in dark areas.Work light: Yes