Recent content by missionman
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Understanding analog voltmeter calibration
No no no, I've already found that this green box is for the wires. There is nothing wrong with anything else. I was only trying to figure out wiring on it. The 2 blue trimpot potentiometers are the calibration points and they're fine :]- missionman
- Post #27
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
Very good points. this meter has a Barons 3296 square trimpot potentiometer. Its sealed meaning its almost solid state even though it has moving screws. It has 2 of these potentiometers. one sets the voltage at 10v within 0.01% accuracy. The other tops it at 15v, same deal. its a small scale but...- missionman
- Post #24
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
OK im logging notes on this. My voltmeter is crucial. Its monitoring a battery bank RV set up. I already tried a SMD VM-1 analog LED voltmeter due to all the hype around it. I tested it against a cheap 2.5 class voltmeter, a $100 clamp meter an a $50 digital voltmeter on my batteries. They all...- missionman
- Post #22
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
Yep, mine looks almost exactly like that only the screws have blue hardened epoxy glue or locktite on half of it. Same brass screws. Now i know not to touch that area. Thank you for all the valuable info.- missionman
- Post #20
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
Wow that is nuts! I also touch the back of the curicut board and the needle instantly falls back to zero! So glad you told me this. this would've drove me mad had I not known. So this illustrates the importance of these 0.5 class voltmeters needing to be installed rather than handled. Slightest...- missionman
- Post #18
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
Thanks for this! Thats genius. This turned out to be the issue. The voltmeter was on my comforter on my bed developing static. I verified this by running finger over the cover and the super fine needle dropped! holy cow.- missionman
- Post #16
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
Yes, in this case I think he assumed I turned the glued in place micro flat head screws. Heres something really funny though. I understand now these screws on the green box are just back off and back on tension for the + an - connections or "sense" wires. However when the dial is perfectly...- missionman
- Post #12
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
I guess this was a misunderstanding. The seller assumed I turned the blue terminals on top. So I guess its still in calibration. The BLUE set screws that are glued in place are the calibration screws. Oh well this can help others hopefully.- missionman
- Post #9
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
The seller on ebay for this Zantum Model ZAPV15B class 0.5 just told me the blue is the wire terminals. Is this correct? I think maybe he thought I was talking about the blue screws that are set in locktite that you see sticking out the top.- missionman
- Post #8
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
yes I had to edit my last repy. I uploaded 3 new photos- missionman
- Post #6
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
Yes these 2 screws on this green thing. Now I'm being told they ARE negative and positive terminals. This, after I was told they were calibration screws but I think they mistook thinking I meant the blue locktite set screws on top in the photo here I'm uploading. EDIT: I can't seem to upload new...- missionman
- Post #4
- Forum: Electrical Engineering
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Understanding analog voltmeter calibration
How did you find PF?: I have been trying desperately to correct a mistake I made when I received my new Zantum Class 0.5 10-15v voltmeter. The 2 screws on the back I thought were for wiring. Sure enough I found out they were calibration screws. I willy nilly began turning them thinking "is this...- missionman
- Thread
- Analog Calibration Voltmeter
- Replies: 33
- Forum: Electrical Engineering