{"product_id":"testo-750-3-digital-voltage-tester-gfci-0590-7503","title":"Testo 750-3 Digital Voltage Tester with GFCI","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThis Testo 750-3 digital voltage tester is built for tradies needing quick, reliable electrical checks on site, from split systems to commercial panels. It helps confirm circuits are dead before you touch them, or verifies correct voltage and phase.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eWhen you're up a ladder on a scorching Australian roof, you need a tool that's easy to read and tough enough to handle daily knocks. This unit delivers clear feedback and has a built-in light for those dark corners.\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 electricians and refrigeration mechanics\u003c\/li\u003e\n\u003cli\u003eBuilding maintenance teams\u003c\/li\u003e\n\u003cli\u003eApprentices learning electrical diagnostics\u003c\/li\u003e\n\u003cli\u003eCompetent DIY owners checking power supply\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 750-3 is designed for general electrical testing in AC and DC circuits up to 690 V. It's suited for verifying de-energisation on a wide range of residential and commercial electrical systems. The GFCI test function is specifically for testing Ground Fault Circuit Interrupters (RCDs) in AC outlets.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eIf you're running a different model or need specific features beyond voltage, continuity, and phase checks, review the technical 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\u003eGFCI Test Function:\u003c\/strong\u003e Applies a 35 mA load to test RCDs, with a vibrating alert for active testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital LCD Display:\u003c\/strong\u003e Shows actual AC\/DC voltage measurements up to 690 V for precise readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-Around LED Voltage Bar:\u003c\/strong\u003e Patented design for clear, visible voltage indication from any angle, even in low light.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in Flashlight:\u003c\/strong\u003e Illuminates the test point, handy for working in dark switchboards or plant rooms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Input Impedance:\u003c\/strong\u003e Helps prevent ghost voltages from false readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCAT IV 600V \/ CAT III 690V Safety Rated:\u003c\/strong\u003e Meets high standards for working in distribution boards and main electrical installations.\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\n\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\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDC Voltage Measuring Range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e10 to 690 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eAC Voltage Measuring Range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e10 to 690 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eResolution\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e1 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eAccuracy\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e± (3 % of mv + 5 Digits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eGFCI Test Load\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e35 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eOperating Humidity\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e0 to 95 %rH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e295 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDimensions (L x W x H)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e270 x 72 x 35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e-10 to +50 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e-15 to +60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eProtection Class\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eIP64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eOvervoltage Category\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eCAT IV 600 V; CAT III 690 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eBattery Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e2 AAA batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDisplay Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eLCD, one-line\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 750-3 Digital Voltage Tester\u003c\/li\u003e\n\u003cli\u003e2 x AAA batteries\u003c\/li\u003e\n\u003cli\u003eMeasuring tip protector\u003c\/li\u003e\n\u003cli\u003eMeasuring tip caps\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 self-check on a known live source before and after use to ensure the tester is functioning correctly.\u003c\/li\u003e\n\u003cli\u003eFor voltage testing, connect the probes across the circuit or from phase to earth. Read the voltage directly on the LCD and observe the LED bar.\u003c\/li\u003e\n\u003cli\u003eTo test for continuity, ensure the circuit is de-energised and apply probes. The tester will indicate continuity with an audible tone or visual cue.\u003c\/li\u003e\n\u003cli\u003eFor phase sequence, touch the probes to the three phases. The tester will indicate the correct phase rotation for motor hook-ups.\u003c\/li\u003e\n\u003cli\u003eTo perform a GFCI (RCD) test, connect the probes to the active and neutral terminals of the outlet, then activate the test function. Confirm the RCD trips.\u003c\/li\u003e\n\u003cli\u003eUse the built-in flashlight to illuminate dimly lit work areas like behind compressors or inside electrical panels.\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\u003eAlways observe lockout\/tagout procedures before commencing work on de-energised circuits.\u003c\/li\u003e\n\u003cli\u003eDo not exceed the maximum rated voltage of 690 V AC\/DC.\u003c\/li\u003e\n\u003cli\u003eRegularly inspect the test leads and housing for any damage before use.\u003c\/li\u003e\n\u003cli\u003eThis tool is not for measuring current; use a clamp meter for current measurements.\u003c\/li\u003e\n\u003cli\u003eAlways follow Australian wiring rules (AS\/NZS 3000) and Safe Work Australia guidelines when performing electrical tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eTradie Pro Tip\u003c\/h2\u003e\n\u003cblockquote style=\"border-left: 4px solid #007acc; background-color: #f9f9f9; font-style: italic; padding: 15px; margin: 20px 0;\"\u003e\nBefore you even think about touching a wire, always use your voltage tester on a known live circuit first, then on the circuit you're about to work on, and then on the known live circuit again. That 'three-point check' ensures your tester is working right and the circuit is genuinely dead.\n\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;\"\u003eThis Testo voltage tester is an essential part of any electrician's kit. Consider pairing it with a quality clamp meter for current measurements and a non-contact voltage detector for quick initial checks from the HVAC Shop range.\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 is the voltage range this tester can measure?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Testo 750-3 can measure both AC and DC voltages from 10 V up to 690 V, providing clear readings on its digital LCD. This range covers most common residential and commercial electrical systems.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the 750-3 perform GFCI (RCD) circuit tests?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Testo 750-3 features a dedicated GFCI test function. It applies a 35 mA load to the circuit to verify that Ground Fault Circuit Interrupters are tripping correctly.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this voltage tester suitable for outdoor or dusty work environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Absolutely. With an IP64 protection class, the Testo 750-3 is rated as dust-tight and protected against water splashes from any direction, making it robust for typical Australian worksite conditions.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Testo","offers":[{"title":"Default Title","offer_id":43552839663675,"sku":"0590 7503","price":361.06,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0316\/7787\/4235\/files\/testo-750-3-voltage-tester-free-front.jpg?v=1779948383","url":"https:\/\/www.hvacshop.com.au\/products\/testo-750-3-digital-voltage-tester-gfci-0590-7503","provider":"HVAC Supply Shop","version":"1.0","type":"link"}