AUTOOL DM103 Digital LCR Tweezer for Resistance Capacitance and Inductance

AUTOOL DM103Product OverviewThe AUTOOL DM103 is a multifunctional portable digital LCR tweezer for SMD component testing, automotive circuit board repair, and electronic troubleshooting. With ±0.5% measurement accuracy, a HD OLED color display, smart component recognition, and support for resistance, capacitance, inductance, diode, and continuity testing, it helps users quickly identify components and evaluate component condition directly on high-density circuit boards.DM103 supports three test frequencies — 100Hz, 1kHz, and 10kHz — and two effective test levels, 0.3V and 0.6Vrms. During measurement, it can synchronously display primary and secondary parameters, including RS, D, Q, Z, and X values, meeting a wider range of component diagnosis and repair needs than basic multimeters.±0.5% Accuracy 6 Test Modes HD OLED Type-C Upgrade100Hz1kHz / 10kHz0.3V0.6Vrms400mAhLithium Battery3 YearsWarranty Click to enlargeKey FeaturesKey FeaturesFor automotive circuit board testing, the D value and Q value are important indicators for component health. DM103 helps users go beyond static capacitance or resistance readings and judge component performance more accurately.D / Q Value InsightRead D and Q values together with L, C, and R data to judge component condition faster and avoid basic multimeter misreads.Auto Component RecognitionSmart recognition helps identify resistors, capacitors, and inductors quickly on dense automotive boards and SMD repair jobs.Tweezer Form FactorThe tweezer-style probes reach tight board spaces and keep the workflow compact without changing tools.Board-Level RepairSynchronized primary and secondary values help technicians compare component behavior quickly during ECU board troubleshooting. Click to enlargeKey FeaturesKey FeaturesDM103 combines smart recognition, six test modes, OLED display, rechargeable battery power, fine gold-plated tips, and Type-C software upgrade support in a compact tweezer-style tool.6 Test ModesSupports automatic, inductance, capacitance, resistance, diode, and continuity test modes. Auto mode quickly identifies resistance, capacitance, and inductance without manual switching.Primary Secondary ParametersDisplays primary values and secondary parameters at the same time, including RS, D, Q, Z, and X values, helping users evaluate both component type and performance condition.HD OLED Color DisplayThe self-illuminating HD OLED color screen provides high brightness and clear reading in bright or dim working environments.400mAh Rechargeable BatteryBuilt-in 400mAh lithium battery supports up to 12 hours of continuous operation on a full charge, suitable for extended diagnosis and batch testing.Gold-Plated Fine TipsFine gold-plated contact probes improve contact reliability and measurement accuracy when testing small SMD components on high-density circuit boards.Type-C Software UpgradeSupports online software upgrades through a Type-C connection to a computer, helping keep the device updated with feature and performance improvements. Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlargeSpecificationsSpecificationsReview the DM103 measurement ranges, parameters, frequencies, display settings, power, size, and operating environment before ordering.MeasurementProductAUTOOL DM103 Digital LCR TweezerAccuracy±0.5%Resistance Range10mΩ-10MΩCapacitance RangeAuto Mode: 50pF-5mF; Capacitance Mode: 1pF-20mFInductance RangeAuto Mode: 5μH-60H; Inductance Mode: 1μH-60HSupported ParametersL, C, R, D, Q, Rs, RS, Z, XFrequency100Hz, 1kHz, 10kHzTest Level0.3V, 0.6V / 0.6VrmsTest Speed1 time / secondTest ModesAutomatic, inductance, capacitance, resistance, diode, and continuityDisplay And SettingsDisplayHD OLED color displayLanguage SelectionChinese / EnglishVolume Setting0%-100�cklight Brightness10%-100%Auto Power OffOff / 5min-120minPower And BuildBattery Capacity3.7V, 400mAh lithium batteryContinuous OperationUp to 12 hours on a full chargeCharging / UpgradeType-C charging and Type-C software upgradeMaterialABSDimensions145mm x 30mm / 5.7in x 1.2inEnvironmentOperating EnvironmentUp to 40°C, humidity <75%Storage Environment-20°C to 60°C, humidity <80%Warranty3-year warranty for eligible non-human damage cases MeasurementProductAUTOOL DM103 Digital LCR TweezerAccuracy±0.5%Resistance Range10mΩ-10MΩCapacitance RangeAuto Mode: 50pF-5mF; Capacitance Mode: 1pF-20mFInductance RangeAuto Mode: 5μH-60H; Inductance Mode: 1μH-60HSupported ParametersL, C, R, D, Q, Rs, RS, Z, XFrequency100Hz, 1kHz, 10kHzTest Level0.3V, 0.6V / 0.6VrmsTest Speed1 time / secondTest ModesAutomatic, inductance, capacitance, resistance, diode, and continuity Display And SettingsDisplayHD OLED color displayLanguage SelectionChinese / EnglishVolume Setting0%-100�cklight Brightness10%-100%Auto Power OffOff / 5min-120min Power And BuildBattery Capacity3.7V, 400mAh lithium batteryContinuous OperationUp to 12 hours on a full chargeCharging / UpgradeType-C charging and Type-C software upgradeMaterialABSDimensions145mm x 30mm / 5.7in x 1.2in EnvironmentOperating EnvironmentUp to 40°C, humidity <75%Storage Environment-20°C to 60°C, humidity <80%Warranty3-year warranty for eligible non-human damage cases How To UseHow To UseDM103 uses a compact three-button layout with Type-C charging / upgrade interface, OLED display, charging indicator, and precision tweezer tips.Power / ModePress to power on. Long press to power off. In measurement mode, switch among AUTO, L, C, R, diode, and continuity.Frequency / MenuUse this key to switch frequency in measurement mode. Long press to enter or exit settings, then move downward.Hold / LevelHold the current reading in measurement mode. Long press to switch key sound, and move upward inside settings.Type-C / OLED / TipsCharge or upgrade through Type-C, read results on the OLED screen, and touch SMD parts with the gold-plated tips.Before You Order And UseBefore You Order And UseDM103 is designed for passive component and circuit-board component testing. It is not designed for live-circuit measurement.Safety And Measurement NotesDo not apply voltage during measurement.DM103 is not designed for measuring live circuits.Always disconnect power before testing circuit-board components.Fully discharge all capacitors before measurement.Always discharge capacitors before measurement to prevent device damage and improve reading accuracy.Avoid high temperatures, dust, and direct sunlight during use or storage.Do not use in humid environments.Do not use near flammable gases or vapors to prevent safety hazards.Manual And DownloadsManual And DownloadsDownload the AUTOOL DM103 manual for measurement modes, button operation, settings, charging, software upgrade, and safety instructions. Click to enlargeAUTOOL DM103 User ManualOpen the PDF manual for detailed DM103 operation, setting, charging, upgrade, and safety guidance. Download ManualNeed Setup Confirmation?Contact AUTOOL Store before ordering if you need help confirming measurement range, D/Q value use, Type-C upgrade support, SMD testing suitability, or safety precautions.Email[email protected] WhatsApp 86 189 2647 7404Related ProductsRelated ProductsCompare related AUTOOL circuit testers, digital meters, breakout boxes, and workshop support tools before choosing the right electrical diagnosis workflow.Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Automotive Diagnostic MultimeterAUTOOL DM202 Mini Digital Multimeter NCV Tester Ture-RMS 4000 CountsRated 0 out of 5(0) From US$39.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Automotive Diagnostic MultimeterAUTOOL DM303 Digital Multimeter Car Circuit TesterRated 0 out of 5(0) From US$190.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Automotive Diagnostic MultimeterAUTOOL DM301 Auto Digital Multimeter Car Circuit TesterRated 0 out of 5(0) From US$109.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Used Car Diagnostic TesterAUTOOL OBD2 Breakout Box Protocol Detector Upgraded VersionRated 0 out of 5(0) From US$109.00 Select options This product has multiple variants. The options may be chosen on the product page Click to enlargeWhat Is In The BoxWhat Is In The BoxThe packing list image shows the main DM103 tweezer, protective storage case, Type-C cable, and user manual. Packing List uses only the most relevant complete package image.Main UnitAUTOOL DM103 Digital LCR TweezerStorageProtective storage caseCableType-C cableDocumentationUser manualRelated GuidesRelated GuidesUse these related articles to understand component testing, multimeter use, board-level diagnosis, and electrical troubleshooting before choosing DM103. Guide / 2025-10-22AUTOOL New Product Release | DM103 Digital LCR TweezerLearn the DM103 positioning, D/Q interpretation, and component-level testing workflow. Guide / 2021-08-02Powerful automotive diagnostic tool – CS320Understand where handheld measurement tools fit in ECU and circuit-board diagnosis workflows. Guide / 2025-09-22What exactly is the difference between a fuse and a relay?Review practical relay and fuse diagnosis logic before deep component-level measurement. Guide / 2025-09-12Common Car Breakdowns and SolutionsSee common electrical fault patterns and where LCR-level measurement can reduce misdiagnosis.Questions And AnswersThese answers cover live-circuit safety, capacitor discharge, D value, supported test components, test frequency, battery life, software upgrade, and warranty support. Can DM103 Measure Live Circuits? No. DM103 is not designed for measuring live circuits. Always disconnect power and fully discharge capacitors before testing to prevent device damage and ensure accurate readings. Why Is D Value Important? D value helps evaluate capacitor loss. A lower D value indicates lower loss and better component condition, while a higher D value may indicate aging, damage, or poor component quality. What Components Can DM103 Test? DM103 can test resistance, capacitance, inductance, diode, and continuity. It also supports automatic component recognition for resistance, capacitance, and inductance testing. What Frequencies Does DM103 Support? DM103 supports three testing frequencies: 100Hz, 1kHz, and 10kHz. How Long Can The Battery Last? The built-in 400mAh lithium battery supports up to 12 hours of continuous operation on a full charge. Can DM103 Be Updated? Yes. DM103 supports software upgrades through a Type-C connection to a computer, helping keep the device updated with the latest features and improvements. What Warranty Support Is Available? AUTOOL provides 3-year warranty support for eligible non-human damage cases. Contact AUTOOL Store support for warranty, manual, software upgrade, or measurement questions.Warranty And ContactWarranty And ContactFor product support, manual requests, measurement range confirmation, D/Q parameter questions, Type-C upgrade support, SMD testing suitability, safety precautions, or warranty questions, contact AUTOOL Store directly.Pre-Sales And Product SupportUse support if you need help confirming whether DM103 fits your circuit-board repair workflow, how to interpret D/Q values, how to safely discharge capacitors before testing, how to perform Type-C software upgrade, or what is included in the package.3-year warranty for eligible non-human damage casesManual request and setup confirmationSupport for measurement range, D value, Q value, RS / Z / X secondary parameters, and smart component recognitionType-C charging and software upgrade supportSafety guidance for capacitor discharge and non-live circuit measurementEmail Support[email protected] WhatsApp Support 86 189 2647 7404