{"product_id":"klein-tools-rt390-circuit-analyzer-large-color-lcd-afci-gfci-test-120v-outlet-verifier","title":"Klein Tools RT390 Circuit Analyzer — Large Color LCD, AFCI\/GFCI Test, 120V Outlet Verifier","description":"\u003ch2\u003eOverview of the Klein Tools RT390 Circuit Analyzer\u003c\/h2\u003e\n\u003cp\u003eThe Klein Tools RT390 Circuit Analyzer is a portable testing companion for evaluating wiring conditions at electrical outlets. With a large color LCD, it presents clear results for wiring faults, AFCI and GFCI devices, and voltage behavior across multiple load levels. Designed for North American 120V AC, 3-wire outlets, this tool blends professional-grade precision with practical on-site usability for electricians, contractors, and serious DIY enthusiasts alike.\u003c\/p\u003e\n\u003cp\u003eRather than relying on guesswork, the RT390 provides visual insights you can trust. The color display highlights key readings, so you can quickly spot anomalies, assess device functionality, and decide whether further inspection or action is needed. While results are informative rather than guarantees, they help you approach outlet evaluation with greater clarity and confidence.\u003c\/p\u003e\n\n\u003ch3\u003eKey capabilities at a glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCLEAR COLOR LCD DISPLAY: Large, easy-to-read results for wiring faults, AFCI\/GFCI status, voltage drops, and trip time\u003c\/li\u003e\n  \u003cli\u003eCOMPREHENSIVE WIRING FAULT DETECTION: Identifies common wiring faults in standard, AFCI, and GFCI outlets\u003c\/li\u003e\n  \u003cli\u003eDUAL WIRING FAULT DETECTION: Detects open neutral and open ground scenarios for safer diagnostics\u003c\/li\u003e\n  \u003cli\u003eAFCI AND GFCI DEVICE INSPECTION: Measures trip time and trip current for accurate device assessment\u003c\/li\u003e\n  \u003cli\u003eLOAD TESTING CAPABILITIES: Performs 12A, 15A, and 20A tests to measure voltage drop under real-world loads\u003c\/li\u003e\n  \u003cli\u003eAUTO POWER OFF: Conserves battery life by powering off after 5 minutes of inactivity\u003c\/li\u003e\n  \u003cli\u003eDETACHABLE CORD: Removable cord simplifies storage and transport\u003c\/li\u003e\n  \u003cli\u003eCOMPATIBILITY: For North American 120V AC 3-wire outlets\u003c\/li\u003e\n  \u003cli\u003eSAFETY RATING: CAT III 135V for added protection during on-site testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTwo practical use cases you may encounter\u003c\/h3\u003e\n\u003cp\u003eOn a bustling jobsite, you can quickly verify outlet wiring before installing fixtures or new devices, reducing the risk of undetected faults impacting performance. At a home upgrade, the RT390 helps confirm AFCI\/GFCI protection is functioning as intended, guiding safer, code-compliant work.\u003c\/p\u003e\n\u003cp\u003eWhether you’re inspecting a legacy panel or assessing a newly wired circuit, the RT390 provides a concise, readable readout that supports thoughtful decision-making. Use it as a field-check tool to inventory potential issues, then plan targeted follow-up testing or professional service as needed.\u003c\/p\u003e\n\n\u003ch2\u003eHow to use (quick-start)\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eInsert the RT390 into a 120V AC, 3-wire outlet to begin a test cycle.\u003c\/li\u003e\n  \u003cli\u003eRead the color LCD for wiring fault status, AFCI\/GFCI device condition, and voltage behavior.\u003c\/li\u003e\n  \u003cli\u003eRun load tests at 12A, 15A, and 20A to observe voltage drops and overall performance.\u003c\/li\u003e\n  \u003cli\u003eReview the results, note any warnings, and detach the cord for easy storage when finished.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eWith its balanced mix of insight, portability, and durability, the RT390 is built to support professional workflows without overwhelming the user with jargon or guesswork.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What outlets is the RT390 compatible with?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for North American 120V 3-wire outlets; tests AFCI and GFCI devices for functionality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What measurements does the RT390 provide?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Shows line voltage, AFCI\/GFCI trip time, and voltage drop under 12A, 15A, or 20A loads.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KLEIN TOOLS","offers":[{"title":"Default Title","offer_id":53089650049135,"sku":"B0BT87LJRL","price":214.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0598\/3087\/files\/klein-tools-rt390-display-large-color-lcd.jpg?v=1778696323","url":"https:\/\/taskholt.com\/products\/klein-tools-rt390-circuit-analyzer-large-color-lcd-afci-gfci-test-120v-outlet-verifier","provider":"TaskHolt","version":"1.0","type":"link"}