{"product_id":"testo-770-2-hook-clamp-meter-0590-7702","title":"Testo 770-2 Hook Clamp Meter with Thermocouple Adapter","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThis Testo 770-2 hook clamp meter is built for HVAC techs who need to quickly troubleshoot electrical faults and take temperature readings. It's especially handy for those hard-to-reach cables on a rooftop unit or in a tight plant room. The unique hook-on jaw lets you grab wires safely without needing a third hand, which can be a lifesaver when you're perched on a ladder.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eIt goes beyond basic current and voltage, offering microamp measurement for flame sensors and a Type K thermocouple adapter for essential temperature checks on things like flue gases or superheat\/subcool lines.\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 apprentices\u003c\/li\u003e\n\u003cli\u003eElectrical diagnostics and troubleshooting\u003c\/li\u003e\n\u003cli\u003eFlame sensor (ignition flame rod) testing\u003c\/li\u003e\n\u003cli\u003eTemperature measurement in HVAC systems\u003c\/li\u003e\n\u003cli\u003eGeneral electrical maintenance and service\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;\"\u003eThe Testo 770-2 handles standard AC and DC electrical measurements up to 600V and current up to 400A. Its integrated Type K thermocouple adapter means it's ready for common Type K temperature probes, expanding its utility for various HVAC tasks. The microamp function is purpose-built for checking the ionisation current on heating system flame rods.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eIf your job requires specific certifications or higher measurement ranges, always check the full specifications 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 Separates and grabs wires easily without needing to manually open the clamp jaw.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable Pincer Arm:\u003c\/strong\u003e Makes releasing the hook fast and straightforward, saving time on the job.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicroamp (µA) Measurement:\u003c\/strong\u003e Essential for accurate flame rod (ignition flame sensor) testing in heating systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType K Thermocouple Adapter:\u003c\/strong\u003e Allows connection of external Type K probes for precise temperature measurements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Measurement Detection:\u003c\/strong\u003e Identifies the testing in-process and automatically selects the correct meter configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue RMS (TRMS):\u003c\/strong\u003e Provides accurate readings on distorted waveforms, common in modern electrical systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStarting Current (Inrush) Function:\u003c\/strong\u003e Measures peak current during motor startup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Two-Line Display:\u003c\/strong\u003e Clearly shows readings for easy interpretation.\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;\"\u003eDetails\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;\"\u003eCurrent (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;\"\u003eTemperature (Type K TC) Range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e-20 to +500 °C \/ -4.0° to 932.0 °F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eTemperature (Type K TC) Accuracy\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e±1 °C (0 to +100 °C) \/ ±1.8 °F (32.0° to 212.0 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eTemperature (Type K TC) Resolution\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e0.2 °C \/ 0.2 °F\u003c\/td\u003e\n\u003c\/tr\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 mV to 600 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDC Voltage Resolution\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003emax. 1 mV\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 Resolution\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003emax. 1 mV\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\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 770-2 hook clamp meter (0590 7702)\u003c\/li\u003e\n\u003cli\u003eTest leads\u003c\/li\u003e\n\u003cli\u003e3 x AAA batteries\u003c\/li\u003e\n\u003cli\u003eType K thermocouple adapter\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\u003e\n\u003cstrong\u003ePower Down \u0026amp; Isolate:\u003c\/strong\u003e Always ensure the circuit you're working on is de-energised and locked out before making connections, especially for resistance or continuity tests.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelect Function (if needed):\u003c\/strong\u003e While the 770-2 often auto-detects, confirm the correct measurement type (e.g., ACV, DCA, Temp) for critical readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamp for Current:\u003c\/strong\u003e Use the unique hook function to grab a single conductor for non-contact current measurement. For voltage, connect test leads in parallel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicroamp Checks:\u003c\/strong\u003e When testing flame sensors, connect the meter in series with the flame rod and select the µA range to measure ionisation current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Measurement:\u003c\/strong\u003e Plug your Type K probe into the included adapter and then into the meter to take surface, air, or immersion temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLog Readings:\u003c\/strong\u003e Accurately record all measurements in your service report for diagnostics and compliance.\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\u003eNot rated for high-voltage industrial applications beyond 600V.\u003c\/li\u003e\n\u003cli\u003eAlways verify the meter's CAT rating matches or exceeds the circuit being measured.\u003c\/li\u003e\n\u003cli\u003eEnsure test leads are in excellent condition; replace any damaged or frayed leads immediately.\u003c\/li\u003e\n\u003cli\u003eFollow all relevant Australian electrical safety standards and Safe Work guidance.\u003c\/li\u003e\n\u003cli\u003eOnly use with specified Type K thermocouples and appropriate accessories for temperature measurements.\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 testing flame rods with microamps, make sure your connections are clean. Even a bit of corrosion can skew your readings and lead you down the wrong diagnostic path. Always check both the sensor and the circuit for proper ionisation flow.\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 with a comprehensive electrical toolbox and a set of quality Type K temperature probes for all your diagnostic needs. Check out our range of HVAC test instruments and electrical safety gear.\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 are the main differences between the Testo 770-1 and 770-2?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Testo 770-2 (0590 7702) expands on the 770-1 by adding a Type K thermocouple adapter for temperature measurement. It also includes microamp (\\u00b5A) functionality, specifically useful for testing flame rods in heating systems.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the temperature measuring range for the Type K thermocouple?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The included Type K thermocouple adapter allows for temperature measurements from -20 to +500 \\u00b0C (-4.0\\u00b0 to 932.0 \\u00b0F). This range is suitable for a wide variety of HVAC temperature checks.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the Testo 770-2 suitable for testing flame sensors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Testo 770-2 is well-suited for testing flame sensors because it features dedicated microamp (\\u00b5A) measurement capability. This function is essential for accurately checking the ionisation current of flame rods in heating systems.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Testo","offers":[{"title":"Default Title","offer_id":43552840089659,"sku":"0590 7702","price":654.82,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0316\/7787\/4235\/files\/testo-770-2-trms-current-probe-front.jpg?v=1779948396","url":"https:\/\/www.hvacshop.com.au\/products\/testo-770-2-hook-clamp-meter-0590-7702","provider":"HVAC Supply Shop","version":"1.0","type":"link"}