Products > Test Equipment
Micsig CP1003/CP503 100MHz/50MHz Current Probe
Martin72:
--- Quote from: Psi on November 19, 2022, 02:03:22 am ---Do you think it's feasible to make up a cable with thinner wire loop across it to turn the 30A range into 300A?
--- End quote ---
We also got the A6303 Probe from tek, which can measure up to 100A.
To use it (or the 50Mhz A6302) for higher currents there´s a simple trick avaible.
A "current divider"...
Say 1:10, take 10 wires absoutely with the same length (crimped together on both sides)as a kind of link in the circuit current flowing.
Then hook the probe in one of the 10 wires and measure the current, multiply it with 10...
It´s the opposite of turning several wires around the core (this you do when you got less current flow)
To simulate more current as you got you turn multiple wires to the core.
To measure more current than your probe can, you use a divider.
tautech:
--- Quote from: EEVblog on November 19, 2022, 02:20:32 am ---
--- Quote from: Psi on November 19, 2022, 02:03:22 am ---Do you think it's feasible to make up a cable with thinner wire loop across it to turn the 30A range into 300A?
--- End quote ---
I guess that's possible. Never tried it myself.
--- End quote ---
It's an old as the hills trick and even mentioned in old Tek documentation and one reason why we won't stock current probes with tiny cable holes so to get multiple wraps into them.
EEVblog:
--- Quote from: tautech on November 19, 2022, 02:32:32 am ---
--- Quote from: EEVblog on November 19, 2022, 02:20:32 am ---
--- Quote from: Psi on November 19, 2022, 02:03:22 am ---Do you think it's feasible to make up a cable with thinner wire loop across it to turn the 30A range into 300A?
--- End quote ---
I guess that's possible. Never tried it myself.
--- End quote ---
It's an old as the hills trick and even mentioned in old Tek documentation and one reason why we won't stock current probes with tiny cable holes so to get multiple wraps into them.
--- End quote ---
No, this is the opposite. Not multiple turns to turn a large current proce into a smaller current probe, but a single thicker wire paralleled with a thinner wire that goes through the current probe to turn a small current probe into a bigger current probe. Probaby easier to use say 10 wires of the same diameter and then only clamp one of them, bingo 1:10 probe.
Martin72:
See my last post here.
nctnico:
--- Quote from: EEVblog on November 19, 2022, 01:59:26 am ---
--- Quote from: Martin72 on November 19, 2022, 01:07:15 am ---WTF...
Do you ship to germany ?? :D
If yes you can bet on it I want one...
Then testing it and if it´s good, maybe order 2 or more for the company I´m working for.
--- End quote ---
I can ship to Germany.
They said a sample will be available at the end of the month.
I don't have a comparatively high bandwidth current probe to compare to though, but can of course check against a series resistor.
--- End quote ---
I have to admit this is a very interesting current probe.
Realistically: how much is MicSig selling these for through their own Aliexpress / Amazon / Ebay store? And how about dealers in Europe like Batronix? My guess is that shipping costs and VAT are going to make the market for overseas orders quite small.
Also, I would really like to see some actual tests where it comes to noise performance and looking at small currents before I would consider getting one myself.
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