{"product_id":"autool-dm109-circuittester","title":"Autool DM109 | Circuit Tester","description":"\u003cdiv style=\"font-family:sans-serif; line-height:1.6; color:#374151; font-size:15px;\"\u003e\n\u003cp\u003e\nThe \u003cstrong\u003eAutool DM109\u003c\/strong\u003e is a \u003cstrong\u003ecircuit tester\u003c\/strong\u003e that combines a multimeter, a simple oscilloscope and \u003cstrong\u003ecomponent driving\u003c\/strong\u003e in one device. You power it from the vehicle battery and it works on systems of \u003cstrong\u003e9 to 72 V\u003c\/strong\u003e, from passenger cars to trucks and electric machinery.\n\u003c\/p\u003e\n\u003cp\u003e\nWith the DM109 you check wiring and components without dismantling them: \u003cstrong\u003eVoltage and polarity\u003c\/strong\u003e, continuity, poor earth, and short circuits. You \u003cstrong\u003edirectly drive\u003c\/strong\u003e a relay, injector or actuator, and with a \u003cstrong\u003e0-5 V signal\u003c\/strong\u003e you can simulate a sensor to see how the control unit responds.\n\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:20px; margin-bottom:40px; align-items:stretch;\"\u003e\n\u003cdiv style=\"flex:1; min-width:250px; background:#ffffff; border:1px solid #e5e7eb; border-radius:8px; padding:25px;\"\u003e\n\u003ch3 style=\"color:#166534; text-transform:uppercase; font-size:13px; font-weight:800; border-bottom:2px solid #22c55e; padding-bottom:12px; margin-top:0;\"\u003eHIGHLIGHTS\u003c\/h3\u003e\n\u003cdiv style=\"display:flex; align-items:flex-start; margin-bottom:12px;\"\u003e\n\u003cspan style=\"color:#16a34a; font-weight:900; margin-right:10px; font-size:16px;\"\u003e✔\u003c\/span\u003e\u003cspan style=\"font-size:14px; color:#4b5563; line-height:1.6;\"\u003e\u003cstrong\u003eWide voltage range\u003c\/strong\u003e — Works on 12, 24, 36, 48 and 72 V systems.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; align-items:flex-start; margin-bottom:12px;\"\u003e\n\u003cspan style=\"color:#16a34a; font-weight:900; margin-right:10px; font-size:16px;\"\u003e✔\u003c\/span\u003e\u003cspan style=\"font-size:14px; color:#4b5563; line-height:1.6;\"\u003e\u003cstrong\u003eThree drive modes\u003c\/strong\u003e — Direct, PWM and pulse, for relays, injectors and actuators.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; align-items:flex-start; margin-bottom:12px;\"\u003e\n\u003cspan style=\"color:#16a34a; font-weight:900; margin-right:10px; font-size:16px;\"\u003e✔\u003c\/span\u003e\u003cspan style=\"font-size:14px; color:#4b5563; line-height:1.6;\"\u003e\u003cstrong\u003eSignal simulation\u003c\/strong\u003e — 0 to 5 V to simulate a sensor.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; align-items:flex-start; margin-bottom:12px;\"\u003e\n\u003cspan style=\"color:#16a34a; font-weight:900; margin-right:10px; font-size:16px;\"\u003e✔\u003c\/span\u003e\u003cspan style=\"font-size:14px; color:#4b5563; line-height:1.6;\"\u003e\u003cstrong\u003eProtected\u003c\/strong\u003e — 20 A fuse plus a circuit breaker in the event of a short circuit or overload.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:250px; background:#ffffff; border:1px solid #e5e7eb; border-radius:8px; padding:25px;\"\u003e\n\u003ch3 style=\"color:#991b1b; text-transform:uppercase; font-size:13px; font-weight:800; border-bottom:2px solid #ef4444; padding-bottom:12px; margin-top:0;\"\u003ePOINTS TO NOTE\u003c\/h3\u003e\n\u003cdiv style=\"display:flex; align-items:flex-start; margin-bottom:12px;\"\u003e\n\u003cspan style=\"color:#dc2626; font-weight:900; margin-right:10px; font-size:16px;\"\u003e✕\u003c\/span\u003e\u003cspan style=\"font-size:14px; color:#4b5563; line-height:1.6;\"\u003e\u003cstrong\u003eCurrent up to 18 A\u003c\/strong\u003e — Continuous maximum of 18 A; heavier loads cannot be run through it.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; align-items:flex-start; margin-bottom:12px;\"\u003e\n\u003cspan style=\"color:#dc2626; font-weight:900; margin-right:10px; font-size:16px;\"\u003e✕\u003c\/span\u003e\u003cspan style=\"font-size:14px; color:#4b5563; line-height:1.6;\"\u003e\u003cstrong\u003eSimple scope\u003c\/strong\u003e — Shows the signal waveform, but does not replace a multi-channel workshop oscilloscope.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; align-items:flex-start; margin-bottom:12px;\"\u003e\n\u003cspan style=\"color:#dc2626; font-weight:900; margin-right:10px; font-size:16px;\"\u003e✕\u003c\/span\u003e\u003cspan style=\"font-size:14px; color:#4b5563; line-height:1.6;\"\u003e\u003cstrong\u003eDriving without a plan\u003c\/strong\u003e — Powering a component directly without a diagram can damage a control unit.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; align-items:flex-start; margin-bottom:12px;\"\u003e\n\u003cspan style=\"color:#dc2626; font-weight:900; margin-right:10px; font-size:16px;\"\u003e✕\u003c\/span\u003e\u003cspan style=\"font-size:14px; color:#4b5563; line-height:1.6;\"\u003e\u003cstrong\u003eUpdates via PC\u003c\/strong\u003e — You install new firmware via USB-C from a computer.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr style=\"border:0; border-top:1px solid #e5e7eb; margin:40px 0;\"\u003e\n\u003ch2 style=\"border-left:5px solid #006aff; padding-left:15px; font-weight:800;\"\u003eApplications and functions\u003c\/h2\u003e\n\u003cp\u003eUsing the power terminals, you connect the DM109 to the \u003cstrong\u003ebattery\u003c\/strong\u003e. With the measuring probe you trace the wiring; the device automatically detects whether you are measuring \u003cstrong\u003evoltage or resistance\u003c\/strong\u003e and indicates the polarity with a red or green LED and a buzzer.\u003c\/p\u003e\u003cp\u003eThe Autool DM109 supports the following functions:\u003c\/p\u003e\u003cul style=\"padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultimeter:\u003c\/strong\u003e Voltage, current, resistance, continuity, diode, frequency with duty cycle and temperature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOscilloscope:\u003c\/strong\u003e Signal waveform of sensors and actuators over time, including for an intermittent fault.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriving components:\u003c\/strong\u003e Relays, injectors and actuators directly, with PWM or in pulses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal simulation:\u003c\/strong\u003e 0 to 5 V to replace a sensor signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFault finding:\u003c\/strong\u003e Polarity, continuity, poor earth, open and closed circuit and short circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLighting:\u003c\/strong\u003e LED lamp for dark areas.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"border-left:3px solid #006aff; padding-left:10px; color:#111827; font-weight:800; margin-top:24px;\"\u003eWhat you see on the display\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured value:\u003c\/strong\u003e Voltage with a resolution of 0.001 V, current with minimum and maximum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaveform:\u003c\/strong\u003e The signal as a graph in the oscilloscope function.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus:\u003c\/strong\u003e Polarity and the selected drive mode.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"border-left:3px solid #006aff; padding-left:10px; color:#111827; font-weight:800; margin-top:24px;\"\u003eHow to use it\u003c\/h3\u003e\n\u003col style=\"padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply:\u003c\/strong\u003e Connect the terminals to the vehicle battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring:\u003c\/strong\u003e Touch the circuit with the measuring probe; the DM109 automatically selects voltage or resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriving:\u003c\/strong\u003e Select direct, PWM or pulse and activate the component.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssessing:\u003c\/strong\u003e Read the value or waveform and compare it with the diagram.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr style=\"border:0; border-top:1px solid #e5e7eb; margin:40px 0;\"\u003e\n\u003ch2 style=\"border-left:5px solid #006aff; padding-left:15px; font-weight:800;\"\u003eSpecial functions and capabilities\u003c\/h2\u003e\n\u003cp\u003eWhat sets the DM109 apart from a standard circuit tester:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal simulation:\u003c\/strong\u003e Simulate a sensor signal with 0 to 5 V to see how the control unit responds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree drive modes:\u003c\/strong\u003e Drive relays, injectors and actuators directly, with PWM or in pulses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolarity detection:\u003c\/strong\u003e A red or green LED and a buzzer show the polarity immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e 20 A fuse plus a circuit breaker in the event of a short circuit or overload.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware updates:\u003c\/strong\u003e New software via USB-C from a computer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWork lamp:\u003c\/strong\u003e LED lamp for dark areas.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr style=\"border:0; border-top:1px solid #e5e7eb; margin:40px 0;\"\u003e\n\u003ch2 style=\"border-left:5px solid #006aff; padding-left:15px; font-weight:800;\"\u003ePackage contents\u003c\/h2\u003e\n\u003cul style=\"padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Autool DM109 circuit tester\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background:#fff7ed; border-left:4px solid #f97316; padding:15px; margin:20px 0; font-size:14px; color:#9a3412; border-radius:0 6px 6px 0; display:flex; align-items:flex-start;\"\u003e\n\u003cspan style=\"font-size:20px; margin-right:12px;\"\u003e💡\u003c\/span\u003e\u003cdiv\u003e\n\u003cstrong\u003eGood to know:\u003c\/strong\u003e Use \u003cstrong\u003esignal simulation\u003c\/strong\u003e 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.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr style=\"border:0; border-top:1px solid #e5e7eb; margin:40px 0;\"\u003e\n\u003ch2 style=\"border-left:5px solid #006aff; padding-left:15px; font-weight:800;\"\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; font-size:14px; margin:20px 0; border:1px solid #d1d5db;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#f9fafb;\"\u003e\n\u003cth style=\"text-align:left; padding:12px 16px; border:1px solid #d1d5db; color:#111827; font-weight:700; width:50%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align:left; padding:12px 16px; border:1px solid #d1d5db; color:#111827; font-weight:700;\"\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003eAutool\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003eDM109\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003eCircuit tester with multimeter and oscilloscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eOperating voltage\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e9 to 72 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eVehicle voltages\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e12, 24, 36, 48 and 72 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eVoltage measurement\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e0.1 to 100 V, resolution 0.001 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eCurrent measurement\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e0 to 18 A continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eResistance\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e1 Ω to 10 MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eTemperature\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e-20 to 600 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eDrive modes\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003eDirect, PWM, pulse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eSignal simulation\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e0 to 5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eProtection\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e20 A fuse and circuit breaker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eDisplay\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e2.8 inch IPS colour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eOperating temperature\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003e-20 to 60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eFirmware\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003eUpdatable via USB-C and PC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; font-weight:700; color:#111827;\"\u003eArticle number\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px; border:1px solid #d1d5db; color:#111827;\"\u003eDM109\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n","brand":"Autool","offers":[{"title":"Default Title","offer_id":67941141053747,"sku":"DM109","price":212.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0912\/5874\/9235\/files\/autool-dm109-circuittester.webp?v=1794561302","url":"https:\/\/www.astools.eu\/products\/autool-dm109-circuittester","provider":"AsTools","version":"1.0","type":"link"}