It seems I'm in a double bind. If I can't afford the £300+ multitmeters you'd recommend then I certainly can't afford to send it off to someone else to fix. Even if I could get a suitable multimeter for less used you've made me so unsure about my choices that I'd have no idea which to buy.
I might as well just give up.
It’s unfortunate you feel I’m responsible for your current situation, but for whatever reason we always seem to come to some negative end when I try to help you. This is exclusively unique to you. I always hope it will go better, but it just never does.
You are able to look at the specifications for any meter new or used for which you can find a manual online. You can do the same thing I’d be doing if I was doing this work for you. I’ve given you all the information you need. Find a meter for sale. Find the manual. Look in the specifications. It’ll say the AC volts accuracy for a given frequency range. If it doesn’t list accuracy up to or beyond 100kHz then it’s not rated to measure AC volts in that range, and won’t give you accurate results. We’re not too concerned about accuracy. We ARE concerned about a meter’s ability to measure 100kHz AC volts at all. If a meter’s specs show some accuracy for AC volts above the audio band (like greater than 20kHz), it might pick something up at 100kHz. I don’t know. But if it doesn’t list accuracy specs specific to frequency range at all, I doubt it will, and if it doesn’t list accuracy specs at all it’s not worth trying. So, you do not have to do what I would do. You don’t have to listen to me at all. You are getting free advice. It’s worth…free. If it was me the first thing I would do is see if the bias amp is doing anything. I’d use my Fluke 85 DMM. I believe the 83 and 87 series would work too. You can find these used. My meter isn’t accurate at 100kHz necessarily, but it’ll measure something up there. For accuracy I’d use my scope. Again, you don’t have to do what I would do, but I’m not there, can’t see your machine, you typically offer very little detail in your posts so I don’t want to dive deep and be off-track. We’ve discussed this before. I think you want me to spend hours looking through manuals and specs and tell you what to get. I’m resistant to do that because I don’t have that kind of time, you can do it yourself, and I’m a little wary about giving you advice because, as noted above, we somehow end up in some zone of negativity where you’re upset with me for the advice I’ve offered, even though you either don’t follow the advice or debate with me about points that are not relevant.
So…
Here we are again. I hope this is of some help. I’m not confident it is.
