Products > Test Equipment

Micsig CP1003/CP503 100MHz/50MHz Current Probe

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Martin72:
Short review:

Someone:

--- Quote from: Martin72 on April 29, 2023, 10:42:17 pm ---Short review:
--- End quote ---
Much more than "short" ! the video has a very nice mixture of examples and discussing those back to the specifications. Noise performance is impressive for such low cost.

Martin72:

--- Quote ---Much more than "short" !
--- End quote ---

Yepp...


--- Quote ---Noise performance is impressive for such low cost.
--- End quote ---

Unfortunately batronix still didn“t have the probes on their site listed - Otherwise I would ask them for a sample to test, like I did in february(Rigol DHO4024).
I would like to compare the micsig with my tek probe(A6302/AM502A), I like the tek much but it needs sooo much space on the desk....

dirtcooker:

--- Quote from: gossamer on April 29, 2023, 09:36:53 am ---I wonder if cp503 would work with this upi to bnc adapter. Or is there something else significantly different between 503 and 503b ?

--- End quote ---
The spec sheet says it needs 12v. Perhaps a modified upi adapter would work. Does anyone have one of these to test?
Also, the B versions require 5v 3A, so these probes are rather power hungry.
I probed voltages on the upi adapter from my RCP500 and found supply voltages across the top row of pins.

dirtcooker:
I recently bought a Micsig RCP500. This is a 500A rogowski ac current probe good to 300 khz, perfect for measuring phase currents on inverters, heat pumps and motor drives, and is portable and more convenient to use than my Tek probes. It pulls only 8 ma from a 5v USB jack so can be used with a battery pack.  I did a couple tests on it which I will summarize here.  The first using a deskew fixture, RCP500 is the blue trace, tek A6302 green, response to 150 ma pulse, both channels adjusted to 500ma per div. Note there are high levels of noise in the scope traces as I am in the city near radio transmitters.

The second test is measuring drain current in a double-pulse test setup using two FGH60N60 IGBT's in a half bridge, with a 150 uH air core coil from drain to source of top IGBT. A Siglent SDG2042 with outputs summed controls the pulse train. 10 Hz rep rate is well below the RCP500's 15 hz -3 db roll off but even so there is no noticeable droop. It has about 2 us delay, and is not fast enough for estimating IGBT switching losses, but is reliable for measuring locked rotor amps without worrying about probe saturation.

I just bought a second one on sale for $100
https://www.sainsmart.com/products/micsig-rcp500-rogowski-ac-current-probe-300khz-with-standard-bnc-interface

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