Hey, everyone. I have some questions about hooking up these voltmeters. http://www.cd4power.com/data/meters/30lcd.pdf
I have two of them hooked up in the single-ended input configuration because I have pin 3 grounded the the negative side of the 24v power supply as well as to the negative V out pin on the 5v converter. I have them set up for +/- 20v, and the inputs are in the range of +/- 10v on one meter and 2-13v on the other. The problem is, I am getting a constant negative overrange indication on one and the other takes a while to become visible and sometimes fluctuates wildly. I checked the inputs with a multimeter and nothing is looking strange. The power supply is at about 5.5v and the inputs are what they should be, but the voltmeters are not giving me the proper voltage. I'm not sure where to go from here.
I have two of them hooked up in the single-ended input configuration because I have pin 3 grounded the the negative side of the 24v power supply as well as to the negative V out pin on the 5v converter. I have them set up for +/- 20v, and the inputs are in the range of +/- 10v on one meter and 2-13v on the other. The problem is, I am getting a constant negative overrange indication on one and the other takes a while to become visible and sometimes fluctuates wildly. I checked the inputs with a multimeter and nothing is looking strange. The power supply is at about 5.5v and the inputs are what they should be, but the voltmeters are not giving me the proper voltage. I'm not sure where to go from here.
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