{"product_id":"testo-770-1-hook-clamp-meter-0590-7701","title":"Testo 770-1 Hook Clamp Meter","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThe Testo 770-1 Hook Clamp Meter is a solid choice for electrical work across all types of HVAC systems. This unit simplifies measuring current on tightly packed cables, letting you focus on the job rather than fumbling with leads.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eIts clever hook design lets you grab and separate wires without a heap of hassle, which is a real lifesaver when you're trying to get a reading in a cramped control panel or on a dusty rooftop unit in the Aussie summer heat.\u003c\/p\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eBest For\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eHVAC technicians and service teams\u003c\/li\u003e\n\u003cli\u003eApprentice electricians working on mechanical systems\u003c\/li\u003e\n\u003cli\u003eFacilities maintenance crews\u003c\/li\u003e\n\u003cli\u003eAnyone needing safe, non-contact current measurement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eCompatibility\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThis clamp meter is designed for general electrical measurement in HVAC environments. It's suitable for testing AC and DC voltage up to 600V and AC and DC current up to 400A, covering most residential and light commercial HVAC electrical circuits, motor windings, and control systems.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eIt meets CAT III 600 V safety standards. If you're running a different model, check fittings and specs before ordering.\u003c\/p\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eFeatures\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnique Hook-On Function:\u003c\/strong\u003e Easily separates and grabs individual wires for non-contact current measurement, even in tight spots.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable Post:\u003c\/strong\u003e Fast and easy release of hooked wires, boosting efficiency on the job.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Configuration:\u003c\/strong\u003e The meter identifies the measurement type and sets itself up, saving time and reducing error.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue Root Mean Square (TRMS):\u003c\/strong\u003e Ensures accurate readings for distorted waveforms found in modern electrical systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInrush Current Capture:\u003c\/strong\u003e Essential for diagnosing starting issues on compressors and fan motors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMin\/Max\/Hold Functions:\u003c\/strong\u003e Capture transient peaks and lows, or hold stable readings for easy logging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Two-Line Display:\u003c\/strong\u003e Clear readout of measurements for better visibility in varying conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 16px; margin-bottom: 20px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDC Voltage Range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e1.0 mV to 600.0 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDC Voltage Accuracy\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e± (0.8 % of mv + 3 Digits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eAC Voltage Range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e1 mV to 600 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eAC Voltage Accuracy\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e± (1.0 % of mv + 3 Digits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDC Current Range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e0.1 to 400 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDC Current Accuracy\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e± (2.0 % of mv + 5 Digits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eMax Current (AC\/DC)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e400 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eSafety Rating\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eCAT III 600 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003ePower Supply\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e3x AAA batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eTesto 770-1 Hook Clamp Meter (400 A)\u003c\/li\u003e\n\u003cli\u003eSet of test leads\u003c\/li\u003e\n\u003cli\u003e3x AAA batteries\u003c\/li\u003e\n\u003cli\u003eInstruction manual\u003c\/li\u003e\n\u003cli\u003eQuick start guide\u003c\/li\u003e\n\u003cli\u003eCertificate of conformity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eUsing It on the Job\u003c\/h2\u003e\n\u003col style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eAlways perform a safe isolation procedure or wear appropriate Personal Protective Equipment (PPE) when working with live electrical circuits.\u003c\/li\u003e\n\u003cli\u003ePower on the 770-1. It will automatically detect many common measurement types, but confirm your desired function.\u003c\/li\u003e\n\u003cli\u003eFor non-contact current measurements, use the unique hook design to safely grab a single conductor.\u003c\/li\u003e\n\u003cli\u003eWhen checking voltage, resistance, or continuity, connect the included test leads securely to the appropriate jacks and the circuit under test.\u003c\/li\u003e\n\u003cli\u003eUtilise the inrush current function to diagnose startup issues on motors and compressors.\u003c\/li\u003e\n\u003cli\u003eAfter use, power off the meter, disconnect leads, and store it safely to protect against knocks and dust.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eLimitations \u0026amp; Safety Notes\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eThis meter is for electrical measurements only; it does not measure temperature, pressure, or vacuum.\u003c\/li\u003e\n\u003cli\u003eThe unit is rated for CAT III 600 V. Do not attempt to measure voltages or currents exceeding this rating.\u003c\/li\u003e\n\u003cli\u003eAlways inspect test leads for damage before each use and replace them if necessary to prevent electrical hazards.\u003c\/li\u003e\n\u003cli\u003eAdhere to Australian standards and Safe Work Australia guidance for all electrical testing procedures.\u003c\/li\u003e\n\u003cli\u003eThe automatic measurement detection is a convenience, but always double-check the displayed function matches what you intend to measure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cblockquote style=\"border-left: 4px solid #007acc; background-color: #f9f9f9; font-style: italic; padding: 15px; margin: 20px 0;\"\u003eWhen you're trying to snag a single wire in a messy control box, use the hook feature to grab it without accidentally touching other conductors. It saves a lot of fumbling and keeps you safer when dealing with live circuits.\u003c\/blockquote\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003ePair With\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003ePair the Testo 770-1 with a quality digital multimeter for more precise voltage\/resistance work, and consider an insulation tester for comprehensive motor winding diagnostics. A reliable transport case is also a good idea to protect your gear on site.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Automated FAQ Schema --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What types of measurements can the Testo 770-1 perform?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Testo 770-1 measures AC\/DC voltage up to 600 V and AC\/DC current up to 400 A. It also offers resistance, continuity, frequency, and inrush current measurements, making it suitable for a wide range of HVAC electrical checks.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this clamp meter suitable for live work?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Testo 770-1 is rated for CAT III 600 V, which means it can be safely used for measurements on circuits directly connected to the low-voltage installation, like distribution boards and final sub-circuits. Always follow safety protocols for live electrical work.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What comes included with the Testo 770-1?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The meter comes complete with test leads, three AAA batteries, a detailed instruction manual, a quick start guide, and a certificate of conformity. You'll have everything needed to get started right out of the box.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Testo","offers":[{"title":"Default Title","offer_id":43552839958587,"sku":"0590 7701","price":500.82,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0316\/7787\/4235\/files\/testo-770-1-trms-current-probe-front.jpg?v=1779948395","url":"https:\/\/www.hvacshop.com.au\/products\/testo-770-1-hook-clamp-meter-0590-7701","provider":"HVAC Supply Shop","version":"1.0","type":"link"}