I'm trying to determine if my Robert Murray-Smith E45 Strange Capacitor is in fact a capacitor at all. Does it exhibit super dielectric properties. I'm not so sure. But I don't really have the proper lab equipment to test this. I'm just using three multimeters and trying to interpret what I'm seeing on the displays.
Robert Murray-Smith Strange Capacitor: https://www.youtube.com/watch?v=738Xz9xM_-8&t=799s
Robert Murray-Smith Strange Capacitor: https://www.youtube.com/watch?v=738Xz9xM_-8&t=799s
Let the component tester decide what it is
Might it help to add a frequency counter into the equation? Mind you I haven't really checked the resistance of one of those in use though I'm curious now. Unfortunately I don't have a frequency counter anymore so I can't try it myself. My O-scope died a while ago too which also might have introduced some odd quirks. Either way this is incredibly interesting.
Knowledge of manufacturer qualifying test frequency is necessary, the missing key element here. They call it impedance not resistance.
OL stands for open line 🙂 (or so I've been told…)
Do you like these multimeters? I am in the market for multimeters and I am looking at the Brymen meters.
Methodical, very comprehensive and OCD. That's why I love your videos 🙂 Kudos Julian !!
Hi,i ,I have 2 x 100 what 12 volt panels and i want to grid tie them i live in the uk ,but no idea what
sort specs do i need to look when buying a grid tie inverter can you tell me gene
in my multimeater, a 900 ohm resister blow up and i can't find another 900 ohm to replace that. can someone help me….😣😭
If a capacitor goes short circuit, is it really short or has its capacitance increased to infinity?
I'm confused what you're trying to do?! Is ESR what you're trying to measure?
You could easily hack a power logger together with an INA219 and measure it charging and discharging over time. The ESR is the losses caused by resistance of leads and conductivity of the electrolyte allowing charge to leak through I think?
There is running a current. The current is through the multimeter measuring voltage, and the multimeter is not connected across the multimeter measuring amps.
Julian – an oscilloscope across the meter set to read capacitance would give an idea of how the thing determines capacitance – maybe!
your a mad man
E45, shake before use 🙂
O.L. stands for Over Limit Or Out of Limit. Just thought you would like to know!
Very interesting things you look at, that most of us just say "That's just the way it works".
Keep up the fun Videos!!!!!!!
Robert Murray-Smith is clearly a charlatan.
Hi Julian. OL doesn't stand for 'overload' it stands for 'Open Loop'. On some DMMs you see OC which stands for 'Open Circuit'
Julian:
Thanks for your many videos.
There are many comments both positive and negative, right and wrong here already. I think there are many positives in this video (showing that having a handful of multimeters is good, measuring properties of a multimeter with a multimeter, etc). But I think one thing is clear:
The rising and falling behaviour seen when one meter is in the 20M+ range is surely due to the lack of shielding/guarding, and more specifically with your hands moving in the vicinity of the capacitor.
Meters which claim to make accurate high (> 10 MOhm) resistance measurements usually have a very high impedance input (> 1 GOhm). These inputs will, for lack of a better description, suck up any stray charge in the environment and register it. This can usually be seen by hooking up multimeter leads and just letting them sit. My multimeters will climb all the way out of the microvolt ranges, through the millivolt ranges, up into the 2 volt range. That said, I'm not sure the time to correct these experimental set-ups are worth it unless you have meters that can measure higher up into the megaohm range.
Thanks again!