No... resistance will be proportional to wire length for same type of wire. Longer=more resistance = lower current for given voltage.So longer wires means automatically lower ohms resistance ?
No... resistance will be proportional to wire length for same type of wire. Longer=more resistance = lower current for given voltage.So longer wires means automatically lower ohms resistance ?
If you have a DC clamp meter and can do so without risking touching the live parts, yes
Correct. But the most commmon form of clamp meter is a Current Transformer that only works with AC current. I think DC requires hall effect. I don't own a DC clamp meter myself.Yes I have Clamp meter, please correct me if I am wrong :
Clamp meters offer a contactless way of measuring current but it can’t measure voltage in a contactless way.
Ok, now we have the question.Thx but that doesn’t answer my question :
I have two strings, one string has 10 panels and the other has 20 panels. The panels are the same and have the same specs.
By looking at the output of each string, I notice that the bigger string ( that has more panels ) has a higher voltage but less current than the smaller string, do you have an idea what could be the reason for this ?
Correct. But the most commmon form of clamp meter is a Current Transformer that only works with AC current. I think DC requires hall effect. I don't own a DC clamp meter myself.
Yeah I've got my eye on the 362 but just hesitant cause I don't know if I want true RMS voltage. Probably don't need it.Fluke 365 (Fluke priced)
@jimf909 @hwy17You're correct that a lot of clamp meters only measure AC current. That said, a number of clamp meters now measure both AC and DC current via a clamp. I use a UNI-T UT210D (great price at ~$60) and Fluke 365 (Fluke priced) and they both measure AC and DC amps via the clamp. I recommend both but the UNI-T product is a compact unit at a great price that goes down to milliamps (win-win-win).
Edit: use care selecting a UNI-T 210: sub-models A, B&C only measure AC amps, the D&E sub-models measure AC and DC amps with a capacity of 200 (D) or 100 (E) amps.
No, as far as I am aware, that does not exist.@jimf909 @hwy17
I just found out that my digital clamp Meter measures only AC current !!
I am looking online for a new clamp meter that can measure DC current as well, but before I buy one I want to ask you if you know a clamp meter that can also measure DC voltage in a contactless way :
I want to measure DC voltage of every panel without breaking the circuit, i hope that can be achieved :
Suppose you have 10 panels and there is a clamp voltage meter that can show you the voltage of each panel within the string, so with 10 panels I expect to see the voltage increases after every successive panel
Do you know of any clamp meter that can do this ?
Agreed. There are NCVT devices that test for the presence of AC voltage but they don't measure it. And not DC.No, as far as I am aware, that does not exist.
Well i am no longer sure that such thing doesn’t exist :Agreed. There are NCVT devices that test for the presence of AC voltage but they don't measure it. And not DC.
Will be happy to be proven wrong.