Strange but not impossible, most meters have a amp setting. nothing saying mA, uA?
You guys are really making me sick!
- Thread starter LuckyFish
- Start date
Strange but not impossible, most meters have a amp setting. nothing saying mA, uA?
Hmmm.... 12v DC may not be dangerous to humans from an electrical point of view but very deadly to both fish and humans from an electrolysis point of view. If you have one of those tanks with a closed canopy and open it after a pump has gone faulty then you could be inhaling deadly Chlorine gas. Or your lights may ignite the H2 and O2.
But we are going round and round here just something to consider.
But we are going round and round here just something to consider.
A diode, sure? I know it will have a running capacitor, but never heard of a diode before. Unfortunately a diode could help in this case.
yes and no, depending on the circuitry and buzzer used it may buzz even though the current is very low, and should you have a fault, may not be able to ground the tank well enough.
One of the ideas I'm thinking of is a ciruit that will ground the tank through a shunt with the ability of monitoring the current flow, should the current exceed a threshold it will sound an alarm and hold it until its manually reset, this way even if you have an intermitant problem it would still be picked up.
This buzzer can just serve as a warning, not really work as a earth.
Your idea with the shunt sounds interessting, what about a little ciruit diagram?
dendrosa
Member
The problem with this rule is that it doesn't prevent someone being inadvertanly electrocuted by not switching off the tank. Think wife who fishes out veggie clip from tank to give fish norrie. Kid somehow putting hands in sump.... This rule does not warn you that things have going wrong in your tank.
I would far rather see that things are starting to go pear shaped. Ive been thinking.... you don't even need a ground probe per se. Just the red lead of an ammeter connected to a ss rod in proximity of electricals, while the black lead is connected direct to earth.
A diode will help on DC current not AC current. You will still get half the current flowing through it.
I hear you
better than nothing.As soon as I get some free time I will try get it out.
When I switch it on, I can see for a second mA in the displays corner. But I can not select Amp and the manual doesn't say Amp either. So I have to get a new one.
I was under the impression that all of them do Amps.
A diode is like a electronic check valve, so it can be used in various ways to rectify AC to DC, full wave, half wave etc. But I think what NJ is saying that if you use a diode on the earth which is AC you will still get half the waveform coming through. NJ?
When I switch it on, I can see for a second mA in the displays corner. But I can not select Amp and the manual doesn't say Amp either. So I have to get a new one.
I was under the impression that all of them do Amps.
I though so too, not a true MULTI meter then
In theory yes, but in reality? I think, if you have a real problem, the multimeter blows up and your ground is gone.
yup
Broder
Mudshark
I'm learning a lot from this thread... thanks very much to all contributers. The problem is that EVERY SINGLE MEMBER should be reading this thread. Unfortunately it's got too long most people to wade through. Is there any way that a summarised version could be made sticky?
@Mudshark
I would have used the agreed button, but in your post is none. @viper357
Is Mudshark excluded from the agreed button tool? I wonder why?
EVERY SINGLE MEMBER should be reading this thread
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It should become a sticky already and after having a final solution, an article should be written about the solution and everybody should have the link to it in their signature.
belindamotion
Google Master
...I see the "Thanks" button(Left) and the "Thumb's Up" button(right)...
Strange, now it's there. I hit the button!
belindamotion
Google Master
I'm sure you looked at you'r own Post...
Guys I know nothing about all this, but have been searching to understand it in Laymens terms...
..what is this...? Do we have them...? Are they called something else in SA...? Does it even work with our current...? Sorry clueless...but I read and liked the idea of the thing switching off...like a preventative measure..ignore if I'm bringing a knife to a gun fight..
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