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INNOVA 3320 Auto-Ranging Digital Multimeter

by Innova
4.3 out of 5 stars 1,928 customer reviews
| 205 answered questions
Price: $18.71 Free Shipping for Prime Members | Fast, FREE Shipping with Amazon Prime
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  • UL certified product designed to safely and accurately troubleshoot a variety of automotive and household electrical problems
  • Auto-ranging scales eliminate the need to dial in the correct range when making electronic measurements
  • Features large digital display and color coded LED's for battery quick check
  • Single-setting resistance function for AC and DC voltage
  • Protective rubber corner guards for drop protection
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Product Information

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Warranty [pdf ]

Additional Information

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Product Description

The INNOVA 3320 is a Auto-Ranging Multimeter designed to safely and accurately troubleshoot a variety of automotive and household electrical problems. It's auto-ranging scales eliminate the need to dial in the correct range when making electronic measurements. The 10 MegOhm input is safe for automotive and household uses (i.e., household outlets, fuses, wiring, general-purpose batteries, vehicle battery and charging system, automotive circuits and more). The color-coded LEDs allow you to quickly check household batteries (green = good, yellow = weak and red = replace). Includes attachable test leads, holders and stand for hands free use and features protective rubber corner guards for drop protection. The INNOVA 3320 has a single setting resistance function for AC and DC voltage.

From the Manufacturer

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Innova 3300

The Innova 3300 is an entry-level, hands-free Digital Multimeter designed to safely and accurately troubleshoot a variety of automotive and household electrical problems.

Read more
3300 3320 3340
Reverse Polarity Protection ✓ ✓ ✓
Auto-Ranging ✓ ✓
Protective Rubber Guards ✓ ✓
Auto Shut-Off ✓ ✓
Battery Quick Check LEDs ✓
RPM Reading ✓
Alternator Test ✓
Temperature Reading ✓
Nylon Pouch ✓
Customer Questions & Answers
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Customer Reviews

Top Customer Reviews

5.0 out of 5 starsI completly Love this Meter!!
By Networker on March 17, 2011
Verified Purchase
This little meter is outstanding! I own a Fluke DMM 179 and of course that meter is top of the line. But would you believe this Equus 3320 is 99% spot on with its readings when compared to a recently calibrated Fluke 179!! I compared measurements with the Equus 3320 and the Fluke 179, in AC Voltage, DC Voltage, Resistance, and DC voltage for the Equus in the Battery test modes. It had literally almost identical readings to the Fluke! The circuit board appears to use mostly prime spec electrical components, so I suspect it will remain accurate for a long time as long as it's not abused.

This meter sells on Amazon for less than $20, and has auto ranging. This means instead of having to dial in the max value manually the meter figures out what DCV range to use (if you were measuring DC voltage for example). It's the same deal for other measurements like resistance, AC Voltage, etc, just set to that measurement type and the meter figures out the correct max range. Most auto ranging meters below $99 have slow auto ranging acquisition speed (this is the time it takes for the meter to figure out what range to use). Many of the cheaper auto ranging meters take several seconds to figure out the correct range and then display the measurement. Not the $19 Equus 3320, it was just as fast as the Fluke 179, which is a second or less in the voltage measurements, and under 2 seconds for resistance (resistance auto ranging takes slightly longer on all meters because the meter must send a small amount of current across the device under test first before trying to acquire the range).

The battery test function (which my Fluke 179 does not have) is the main reason I purchased this meter.Read more ›
14 Comments 305 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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3.0 out of 5 starsIt's OK but could be better
By A Scientist on July 3, 2013
Let's start by realizing this is a low cost meter. It has some nice features but also some short comings.
I like the size and shape. The display is very easy to read and the battery meter works nicely even with NiMH AA batteries. The probe storage is also nice.
The resistance auto ranging is reasonably quick. If you ever have to measure a series of say under 100 ohm resistors or tweak a variable resistor with a low resistance value the longer delay of some auto ranging meters can really be quite frustrating. While the wrist strap seems like a bit of a gimmick, I can actually see it being quite useful.

That said the meter has a number of flaws.
-I don't like that it doesn't have a battery door. You have to unscrew the back case to replace the batteries. The case is held in with self tapping plastic screws. It you aren't careful those self tapping screws will strip out the screw holes in short order.
-The leads are rather cheap feeling. They aren't as lousy as the $3 meters but they aren't as good as I've seen on other $20-30 meters. They have rather dull tips and the surface resistance seems rather high. Cleaning with alcohol would probably help.
-The continuity test is slow to trigger. Like the need to check resistance quickly, if you are checking say a number of wires for a good connection, it's frustrating to wait for the check delay to complete. In defense of the meter, this is slow even on some meters costing $100 or more. This one is also latched so it gives a solid beep once it sees continuity. Some meters sound very scratchy when checking continuity.

Safety concerns.
Let's be honest, this is a cheap meter that should never be used on anything more than a standard household wall outlet.Read more ›
10 Comments 158 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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4.0 out of 5 starsGood meter but...
By S. Harris on January 25, 2008
This is a meter of above average quality for the price. A great meter to have for the do it your-selfer for around the house, car or boat. However, one function that is lacking is high range AC current (amps) the description says it measures AC current but doesn't say that the max AC amps it can test is 200mA or .2 amps, not really practical for ANY AC current measurments. You can measure the current of say a 20 watt AC light bulb with this meter. The PC you are using to read this draws about 3.5-4 AMPS or about 3500-4000 milli amps, this meter maxes out at 200 ma.

I bought it for AC amps but can't use it for that. I'll keep it as a back up meter but I have to buy a better meter for AC amps. I guess that's what I get for being a cheap skate... time to buy a Fluke!
18 Comments 316 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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5.0 out of 5 starsGood Meter
By Keel Moose and Squirrel on November 16, 2007
Verified Purchase
This is a good little meter.

Thumb uppers: Small overall size, large LCD display, auto-ranging, uses 2 AA batteries, uses standard sized banana plugs so is compatible with several 3rd party or customized probes/connectors.

Thumb downers: probe clips are such weak, soft rubber that they don't grip the probes securely. And it would be nice for a little more $$ to include a case. So instead buy a $3 camera case to solve both deficiencies. Too bad the over-sized instruction booklet isn't the same size as the meter so it can be stored in the same case.
3 Comments 141 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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5.0 out of 5 starsNice features and low price
By D. C. Eaton VINE VOICE on November 22, 2012
Verified Purchase
Pro
Takes 2 AA batteries (included)
Fold out stand locks closed, but unfortunately swings freely when open
Rubber bumpers provide some protection, although less give than expected
Elastic strap on rear allows the meter to be held on the back of a hand
Test leads are very flexible
Auto-off after 15 min idle
Auto ranging takes about 1-2 seconds to lock on correct range
Small and compact (139mm x 89mm x 32mm), 6.3 oz (180g)
Battery test with load shows lighted LED and actual voltage (most multi-meters cannot test batteries because accurate testing requires an applied load). Test load is 10mA for 1.5 and 9 volt batteries, 100mA for 6 volt batteries, 200mA for 12 volt batteries.

Con
Cannot lock in a specific range (auto range cannot be disabled)
Display does not have a back-light
Clips on side of meter for test leads do not hold probes securely (but better than nothing)
No case
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