Multimeter for 6 volt system

Cheap digital voltmeters ($20 - $40 or so) are OK. But many of them have a hard time getting accurate readings on the old DC generator systems. The harmonics and “noise” inherent in generators and vibrating relay regulator circuits often confuse the meter electronics and result in bizarre, useless readings.

Industrial quality DVM’s are much better than the cheapies on generator circuits. But even some of the good ones occasionally experience difficulties.

Sears now carries a DVM with a DC clamp on ammeter function for around $50. (Can read AC and DC current simply by clamping a probe around the wire). I have not used one however and so don’t know how well they work.

What’s in my toolbox? A cheap Radio Shack analog, a Fluke 77 DVM and a Fluke 87 True RMS DVM. I also have a beat-up Simpson 260 analog (discovered in a scrap tub at work and brought back from the dead) that I break out once in a while. I use the Fluke 77 the most however – it’s still going strong after 18 years of use and abuse!