{"product_id":"btmeter-bt-770k-automotive-multimeter","title":"BTMETER BT-770K Automotive Multimeter — Dwell for 4-Cylinder, Tach 600–12,000 RPM, Auto Ranging | Air-Cooled VW Points \u0026 Charging Tests (BT-770K)","description":"\u003ch2\u003e\u003cb\u003eBTMETER BT-770K Automotive Multimeter with Dwell and Tach\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003eShort answer:\u003c\/b\u003e A multimeter with the two settings a points tune-up needs: \u003cb\u003edwell\u003c\/b\u003e (switchable for 4-cylinder) and \u003cb\u003etach\u003c\/b\u003e (600–12,000 RPM through the test leads). Hook it to the coil's negative terminal and ground, and you can read dwell and idle speed together. It's also a full auto-ranging meter for chasing charging problems, bad grounds and dead gauges.\u003c\/p\u003e\n\u003cp\u003eThe dwell range for your engine code is in our \u003ca href=\"\/pages\/vw-tune-up-spec-lookup\"\u003eVW Tune-Up Spec Lookup\u003c\/a\u003e. Pair this meter with a \u003ca href=\"\/products\/mutt-tools-feeler-gauge-set\"\u003efeeler gauge\u003c\/a\u003e for the points gap and a basic timing light such as the \u003ca href=\"\/products\/innova-3551-inductive-timing-light\"\u003eInnova 3551\u003c\/a\u003e. If you'd rather have dwell and tach built into the timing light, the \u003ca href=\"\/products\/innova-5568-pro-digital-timing-light\"\u003eInnova 5568\u003c\/a\u003e does all of it in one tool.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eVehicle \u0026amp; Engine Fitment\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAir-cooled VW Type 1, 2, 3 and 4:\u003c\/b\u003e dwell and RPM on points ignition; voltage, current and resistance on any system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePorsche 356 and 912:\u003c\/b\u003e 4-cylinder dwell and RPM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eElectrical work:\u003c\/b\u003e generator and alternator output, voltage drops, grounds, gauge senders, fuel injector pulse width on 1975–79 fuel-injected cars.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eKey Features \u0026amp; Benefits\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDwell for 3, 4, 5, 6 and 8 cylinders:\u003c\/b\u003e set it to 4 for every air-cooled VW.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTachometer, 600–12,000 RPM:\u003c\/b\u003e reads through the test leads. The optional inductive RPM clamp (BT-705A) is not included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAuto ranging, 6,000 counts, true RMS:\u003c\/b\u003e with peak hold and MAX\/MIN.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHands free:\u003c\/b\u003e magnetic back, hanger and kickstand to park it on the deck lid or fender.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBacklit 3\" display:\u003c\/b\u003e readable under the car or in a dim garage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePart Number:\u003c\/b\u003e BT-770K\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDC\/AC current:\u003c\/b\u003e to 20 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDC\/AC voltage:\u003c\/b\u003e to 1,000 V DC \/ 750 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eResistance:\u003c\/b\u003e to 60 MΩ\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOther functions:\u003c\/b\u003e capacitance, frequency, duty cycle, pulse width (0.1–10 ms), temperature (thermocouple included), diode, continuity, non-contact voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncluded:\u003c\/b\u003e meter, test leads, thermocouple, zippered carry case\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty:\u003c\/b\u003e 12 months from the manufacturer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eHow do I check dwell?\u003c\/b\u003e Set the meter to dwell, 4 cylinders. Red lead to the coil's negative (terminal 1, the wire to the distributor), black lead to ground. Crank or idle the engine and read it against your spec.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDoes it work on 6-volt cars?\u003c\/b\u003e Dwell is a timing measurement, not a voltage reading, so a 6-volt car still reads. For voltage tests, just read 6 V instead of 12 V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWill it read dwell with electronic ignition?\u003c\/b\u003e No. Electronic ignitions like Pertronix have no points and no dwell to set.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eInstallation\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eTech Note:\u003c\/b\u003e If dwell reads high, the points gap is too small; low means the gap is too big. Re-gap, then check dwell again. Changing dwell moves your timing, so always time the engine last.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cb\u003eExplore Related Categories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eDoing the full tune-up? Start at the \u003ca href=\"\/pages\/vw-tune-up-spec-lookup\"\u003eVW Tune-Up Spec Lookup\u003c\/a\u003e, then browse \u003ca href=\"\/collections\/tools\"\u003eTools\u003c\/a\u003e and our \u003ca href=\"\/collections\/engine\"\u003eengine parts\u003c\/a\u003e.\u003c\/p\u003e","brand":"BTMETER","offers":[{"title":"Default Title","offer_id":66876903358579,"sku":"BT-770K","price":79.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.washburnsmetal.com\/products\/btmeter-bt-770k-automotive-multimeter","provider":"Washburn's Metal","version":"1.0","type":"link"}