This product can expose you to chemicals including DiNP, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov

Auto-Ranging DMMPart#3320

  • Auto-Ranging™ scales eliminate the need to dial in the correct range when making electronic measurements.
  • 10 MegOhm input impedance for safe automotive use.
  • Automotive uses include: automotive circuits, breakers, wiring, vehicle battery & charging systems, electrical components and more.
  • Household uses include: outlets, fuses, wiring, general-purpose batteries, electronic hobbies and more.
  • Large digital display.
  • Single-setting resistance function for voltage (AC & DC)
  • Color-coded LED's display battery quick check
    GREEN = good
    YELLOW = weak
    RED = replace
  • Protective rubber corner guards for drop protection.
  • Includes attachable test leads, holders and stand.
  • Auto shut-off feature.
  • U/L listed for safety and quality.
  • Includes easy-to-read instructions in English, French and Spanish.
  • Support available Monday – Saturday (6 a.m. – 6 p.m. Pacific Time) in English or Spanish, from Innova’s California-based team of Automotive Service Excellence (ASE)-certified technicians.

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Auto-Ranging DMM Part#3320

2 Reviews

Tool Reviews

Does the 3320 Auto-Ranging DMM have a low battery indicator?

Yes. The 3320 Auto-Ranging DMM will display a battery symbol on the LCD when low.

Does the 3320 Auto-Ranging DMM have a fuse?

Yes. The 3320 comes with a 0.315A/250V - UL Listed Bussmann, GMA Type (Radio Shack GMA/270 series; #270-1046 ) fuse.

Does the 3320 Auto-Ranging DMM automatically power off?

Yes. The 3320 Auto-Ranging DMM will shut off after being idle for 15 minutes.

How can I access the batteries?

You can access the batteries by removing two screws on the back of the 3320 DMM.

What size battery does the 3320 Auto-Ranging DMM use?

The 3320 Auto-Ranging DMM uses two 1.5V AA batteries.

Can the 3320 Auto-Ranging DMM measure DC current (AMPS)?

The 3320 Auto-Ranging DMM will measure 10A (DC from 0 to 10 amperes). Unfused DC current (AMPS). * A waiting period of at least 15 minutes is necessary between every 15 second testing period.

Does the 3320 Auto-Ranging DMM have Reverse polarity protection?

Yes. The 3320 Auto-Ranging DMM has Automatic negative (-) polarity indication symbol.

What does OL mean?

If the test current isnt detected, it means there is no continuity. The screen will display 1 or OL (open loop). 

Why do the numbers keep fluctuating when I'm not testing anything?

This is a normal function of the Auto Ranging feature of the 3320 DMM. It is simply picking up signals from the environment around it. You can zero it out by touching the two test leads together. When conducting a test, the meter will automatically zero out before giving a reading.

There are no "Available Upgrades" available.
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FEATURES 3020 3030 3040 3100 3120 3130 3140 3150 3160
CEL - Diagnose + Clear - 1996 + Diesel + Hybrid
ABS - Diagnose + Clear
Vehicle Health - Confirms State Emissions Test
Emissions Readiness Advisor
Definitions in English | Spanish | French  
Internet Updatable & Upgradable  
Battery Backup      
AirBag - Expanded Asian & European Coverage              
View Live Data          
OBD1         Optional Optional Optional

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