This is a normal function of the Auto Ranging feature of the 3340 DMM. It is simply picking up signals from the environment around it. When conducting a test, the meter will automatically zero out before giving a reading.
Yes. The 3340 Auto-Ranging DMM will display a battery symbol on the LCD when low.
Yes. The 3340 Auto-Ranging DMM has Automatic negative (-) polarity indication symbol.
The 3340 Automotive DMM will measure 40mA and 400mA fused DC current (AMPS). The 3340 Automotive DMM will measure 15A Unfused DC current (AMPS). * A waiting period of at least 15 minutes is necessary between every 15 seconds testing period.
The 3340 Automotive DMM will measure RPM on Conventional, Distributorless Ignition Systems (DIS) ignition systems. The inductive pickup must be used with the 3340 Automotive DMM to read RPM. The range of RPM is 0 to 10,000 rpm.
You can access the batteries by removing the screw on the back of the 3340 holding the battery cover in place.
Yes. The 3340 Auto-Ranging DMM will shut off after being idle for 10 minutes.
Yes. The 3340 comes with a 0.500A/250V – UL Listed Bussmann, GMA Type (Radio Shack GMA/270 Series: #270-1047) fuse.
The 3340 Auto-Ranging DMM uses two 1.5V AA batteries.