Auto-Ranging DMM #3320

The Innova 3320 Auto-Ranging DMM eliminates the need to dial in the correct range when making electronic measurements. Its uses include automotive circuits, breakers, wiring, vehicle battery & charging systems, electrical components and more.

Free shipping | 1-Year Warranty


This product can expose you to chemicals including DiNP, which is known to the State of California to cause cancer.
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Automatically selects correct measurement range. Easy for novices, faster for pros.

Protective Rubber Corner Guards:

Drop protection for any work environment.

Measure DC & AC Current:

DC-A/DC-mA & AC/mA

Small Battery Load Test:

Easy to read color coded LEDS allow you to easily check the charge status of batteries.

10 MegOhm Input Impedance:

Safe for electrical and automotive use. Prevent damage to the vehicle’s ECU.

Built in Stand and Wrist Strap:

Frees up hands for testing.

UL Listed:

For safety and quality.

Auto Shut Off Feature:

No longer worry about coming back to a dead multimeter after leaving it on.

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DMM Inductive AMP Probe



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.
Yes. The 3320 comes with a 0.315A/250V - UL Listed Bussmann, GMA Type (Radio Shack GMA/270 series; #270-1046 ) fuse.
Yes. The 3320 Auto-Ranging DMM will shut off after being idle for 15 minutes.
You can access the batteries by removing two screws on the back of the 3320 DMM.
The 3320 Auto-Ranging DMM uses two 1.5V AA batteries.

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.

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

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

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.