Top positive review
71 people found this helpful
Excellent Digital Voltmeter, Great Blue LED Backlighting, Very Accurate, and Very Low Current Draw, about 17 ma@14 VDC
on February 22, 2013
I needed five or six small digital voltmeters for use in my solar PV research lab to display battery voltage, and I first purchased just one of these devices so that I could evaluate it in my workshop to be sure that it met my needs. Well, the first unit passed all of my tests:
It works well, it has great blue LED backlighting that draws very little power, it has a large and very readable display, the voltage display is very accurate, even without any adjustment of the internal trimmer resistor (aka potentiometer), and, at a supply voltage of about 14 VDC, it draws only about 17 ma of current! It also seems to be very tolerant of cold temperatures, to at least down about 10 degrees F!
So, I went back to Amazon and purchased about five more of these voltmeters, and I will likely be purchasing another 10 or 12 of these meters over the next few months. I am already using three of the six voltmeters that I purchased, and the rest are sitting on my lab bench, waiting to be mounted in their enclosures (see below. ....).
These meters, as supplied, are meant to be mounted by snapping them into a rectangular cutout in a panel. For my purposes, I wanted to surface-mount these meters on a large wooden board that holds lots of electronic gizmos, and so I took some small 2"W x 4"L plastic enclosures with flange mounts that I found on my workshop stock shelves, and I cut a 3.0"x1.54" rectangular hole in the center of the cover of each flanged plastic box to allow me to snap-fit the meter inside the box cover, then drilled a small hole near the base of each box to allow cable feed, and I then mounted the flanges of little plastic box on the large wooden panel with two screws. Presto! For about ten minutes of extra work, I have surface-mounted digitial voltmers, mounted in their own sturdy protective flanged plastic enclosures. BTW, for the small flanged plastic enclosures, I used LP-21F and LP-31F flanged plastic enclosures from Polycase, the enclosures are listed at [...] the meter is a bit of a tight fit (due to meter housing length) in the LP-21F, and an easy fit in the LP-31F, which is a slightly larger plastic enclosure (it has greater length); you can choose an enclosure color of black, grey or white.
BTW, in light of the two or three rather negative reviews that I noticed for this product, I will note clearly here that all six of the meters that I ordered worked perfectly right out of the package, and have continued to work well since then. And, none of them had their power connectors mis-wired (as some reviewers reported recently), not that such a problem would have posed a major obstacle for me had it occurred. ...