{"product_id":"fluke-789-processmeter-loop-calibrator-and-dmm-ohmmeters","title":"Fluke 789 ProcessMeter - Loop Calibrator and DMM Ohmmeters","description":"\u003cp\u003eIn this review of the Fluke 789 ProcessMeter, the bottom line is simple: instrumentation technicians and process control professionals will appreciate one rugged tool that combines a trusted multimeter with loop calibration features. The 789 is aimed at field technicians who need a single handheld instrument to measure, source, and simulate 4-20 mA loops while retaining reliable DMM functions. Its biggest selling point is the integration of accurate loop sourcing and a familiar DMM platform, making routine troubleshooting and calibration faster with fewer tool swaps.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated loop sourcing:\u003c\/strong\u003e Built-in ability to measure, source, and simulate DC loop current simplifies troubleshooting and calibration without carrying a separate calibrator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust measurement protection:\u003c\/strong\u003e 1000V overload protection on V, ohms, and frequency plus 150V protection on mA gives confidence when working in industrial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong battery life:\u003c\/strong\u003e Typical run times of about 50 hours for measurement and about 12 hours when sourcing 12 mA mean fewer battery changes on long jobs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear display with backlight:\u003c\/strong\u003e The easy-to-read LCD with backlight keeps readings visible in dim cabinets and poor light conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh current range:\u003c\/strong\u003e A current measurement range up to 30 mA DC covers standard process loop needs and short test scenarios without extra adapters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eTechnicians who work on process control instrumentation, control valves, transmitters, and loop-powered devices will find the Fluke 789 especially useful because it combines accurate loop sourcing and simulation with trusted multimeter measurements in a single handheld package. It is a practical choice for maintenance teams that need dependable field tools and prefer Fluke's ruggedness and safety margins.\u003c\/p\u003e\n\u003cp\u003eThis is less appropriate for users who only need a basic household multimeter or those who require heavyweight laboratory calibration equipment with optical or temperature standards; the 789 is targeted at field service and industrial test rather than benchtop metrology labs.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCombines loop calibrator functions with familiar DMM operation, reducing tool count for technicians.\u003c\/li\u003e\n\u003cli\u003eHigh overload protection levels provide safety when testing unknown circuits in industrial settings.\u003c\/li\u003e\n\u003cli\u003eGood battery endurance for day-to-day field measurement work and extended troubleshooting shifts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBattery is a single 9-volt alkaline, which may be less convenient than rechargeable battery packs for some users.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFluke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e789 ProcessMeter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent measurement range\u003c\/td\u003e\n\u003ctd\u003e0 to 30 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop sourcing accuracy\u003c\/td\u003e\n\u003ctd\u003e0.05 percent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverload protection\u003c\/td\u003e\n\u003ctd\u003e1000V on V\/ohms\/frequency, 150V on mA (with 440 mA 1000V fuse)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eOne 9-volt alkaline; ~50 hours measurement, ~12 hours sourcing 12 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Fluke 789 ProcessMeter is a practical, cost-effective tool for field instrumentation work because it merges accurate loop sourcing and simulation with reliable DMM capabilities on a rugged platform. For maintenance technicians and process control professionals who value durability, safety protection, and battery endurance, the 789 delivers strong value and reduces the need to carry a separate calibrator.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan the 789 source and measure 4-20 mA loops?\u003c\/strong\u003e\u003cbr\u003eYes. The 789 can measure, source, and simulate DC loop current and is designed specifically for 4-20 mA process loops.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does the battery last in typical use?\u003c\/strong\u003e\u003cbr\u003eTypical battery life is about 50 hours for measurement tasks and roughly 12 hours when sourcing 12 mA, using a single 9-volt alkaline battery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the instrument protected against high voltage mishaps?\u003c\/strong\u003e\u003cbr\u003eYes. It includes 1000V overload protection on voltage, ohms, and frequency ranges and 150V protection on the mA range with a 440 mA 1000V fuse for added safety.\u003c\/p\u003e","brand":"Fluke","offers":[{"title":"Default Title","offer_id":48233458565339,"sku":"B000R8ETKW","price":1444.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71dt8oDb_JL._SL1500.jpg?v=1770742531","url":"https:\/\/gearmusthave.com\/products\/fluke-789-processmeter-loop-calibrator-and-dmm-ohmmeters","provider":"GearMustHave","version":"1.0","type":"link"}