Innova 3340 Professional Automotive Digital Multimeter, Black

Nerd Alert: I'm an electrical engineer and spend a lot of time in my test lab. I never heard of this brand, but thought I'd give it a go. I was drawn in by the attachment for spark pickup. I haven't used it exhaustively yet, just tried it and it worked on a motorcycle fine. I'll post back after more experience with it.Regarding the meter functions, it's pretty crazy how many functions this little meter has. I doubt I'll need all of them, but nice to know they are there if a difficult problem occurs on a repair. The temp gauge is nice, but I find for repairs a non-contact IR is much more effective. But, it's better than nothing. So, 5 stars for the multitude of functions. Dwell is really great for points ignition on old motorcycles and cars.I was checking calibration on equipment in my lab this week, so I checked this meter for the heck of it. I'm using a Fluke 5100B, and I was pretty surprised at the accuracy. Volts, Amps, Frequency, Duty Cycle, all spot on. Really, like <0.5% error, and usually just a few digits off on the last significant shown. Even high frequency AC volts was right on (up to 400Vac 20kHz). Your results may vary, since manufacturing tolerances and final factory calibrations can vary. But, very pleasantly surprised.So, for me, super functionality, super high accuracy, super price. Five Stars.

Works great, very well package and very doorbell.

This meter is very easy to use seems to be accurate and a very good value.

I researched devices before choosing this one. It has most of the features that a DIY type like me needs: DV volts, current, resistance, and temperature. I need this mainly for automotive maintenance. The instrument face has large print, making it easy to read from short distances. The gauge is also adjusts scale automatically. There is no need to hunt between different voltage and resistance settings (10, 100, 1000, etc). The probes mount to the side of the unit to simplify storage. It also shuts off automatically after 10 minutes if not used. An audible warning sounds before doing so. The storage pouch is made of quality materials and should last the life of the unit, if not abused.

I bought this because it is the only automotive meter I could find that offers a variety of RPM measurements: inductive pickup for spark plug wires; direct primary coil voltage monitoring for COP (coil on plug) systems; conventional old school tach measurements for distributor systems (for a wide range of cylinder counts); and DIS or waste spark systems. And of course dwell angle measurements. Most modern automotive meters have dispensed with all but the inductive pickup method but I like to have more options.I compared the Innova 3340a DC voltage readings for 1.5 v and 9 v batteries against a Fluke 87 V and measurements were within one or two-thousands of a volt. That is pretty good. When selecting DC volts the display shows 200-300 mV when no measurements are taken. This is due to internal noise from the autoranging circuitry. If I touch the probes together the display zeros out. As I stated, the DC volts measurements I took were very accurate.I compared resistance readings between the 3340a and Fluke for a variety of resistors from my electronics junk box and obtained excellent agreement between these instruments. Examples of 3340a vs. Fluke: 20.5 vs. 20.4 ohm; 27.0 vs. 27.4 ohm; 101.2 vs. 101.2 ohm; 147.5 vs. 147.6 ohm; 986 vs. 986 ohm; 51.1 vs. 51.1 Kohm; 730 vs. 729 Kohm. These resistance readings were off by only 0.1% on average.For my 3340a the accuracy is better on average than the range stated in the product literature.UPDATE Mar 10, 2020: I've had a chance to test the tachometer functions on a lawn mower that has a tach terminal (for the "RPM" function) and a high voltage spark plug wire for the inductive pickup clamp with the "CON" function. I compared the readings of the 3340a with those of a SunPro digital tach and a GTC505 ignition analyzer with a capacitive probe. With both the direct hookup "RPM" and inductive hookup "CON" functions, the average RPMs of the 3340a appeared to agree with the SunPro and GTC505 standards. However the 3340a gave very erratic and jumpy readings making it difficult to obtain an average RPM by eye. (With the "CON" function I had to halve the RPMs because a lawn mower delivers two sparks over the 4 strokes per cycle.) The "DIS" function gave confusing results.Maybe Innova needs to add some simple circuitry to average or smooth out the jumpy tach inputs. Maybe they need to add basic filtering circuitry to handle electrical noise from ignition systems. Either way the tach functions need some minor improvements to make the display more readable.This meter is a fine and accurate meter for basic electrical functions and is very well conceived. I hope that Innova does what they need to do to improve the tach functions and make it the great meter that it deserves to be, even if they have to increase the price a little.

I own a fluke 23 for my job. The amp scale, both 10A and mA function stopped working. Took it to a high end repair center. They found nothing wrong. I watched them test the amp function again and it did register correctly on the test machine. So we went out to my truck and attempted a parasitic draw test and it was most inaccurate. The tech was amazed. He tried several other tests and all passed. Bottom line, How about a new one? Only about $300. Saw this meter on amazon, on sale. Works on all scales! Very easy to see read out and to use. This meter gets used everyday on the job. No problems. Paid $225 for the fluke in 92, cant complain too much about the fluke, it served me well, but as an extorted american worker I dont have the money to replace it. Recommend using better leads than what came with the innova.

buen excellente

I work industrial maintenance a d own several flukes. I didn’t want to spend a lot of money for an automotive meter for my house so I decided on this one. What I do like about this meter is all the options it gives me for testing a vehicle. It is accurate. I’m not a fan of the test leads but they work. They are the common banana plug size so it can be switched out with a different set if needed. The meter itself is lightweight. It does feel really cheap because of that. I feel that if I drop it then it will be in pieces. In my personal opinion I would just recommend getting a Fluke AC/DC clamp meter. Yes it will cost double what this one costs but it will last a lifetime.