| Products > Test Equipment |
| Micsig CP1003/CP503 100MHz/50MHz Current Probe |
| << < (31/33) > >> |
| Dennis Frie:
I was debating whether to buy the Siglent CP6030 or the Micsig CP503B current probe. Considering the price-tag of the Micsig CP503B probe, I decided it was still an interesting probe, even with the linearity issues. I have to say, so far the noise and DC accuracy is pretty damn good. I've played around a bit with the frequency response, trying to measure it at slightly higher currents. Still pretty bad compared to the specs as shown previously in this thread, but overall not a bad current probe the price considered. Compared to the 100 MHz model tested earlier in this thread, I see no reason to buy the 100 MHz as the linearity problems seems comparable. I will probably stick to the Lecroy CP030 probes for high-frequency stuff, but a great probe for a lot of other things. |
| Dennis Frie:
Direct comparison of the measurement Martin72 did. Same scaling on the y-axis, but tested with higher current. Considering I get significantly better linearity with a 50 Mhz probe, I either got lucky with the probe or the higher current makes a difference. Yellow = Martin72' original test Green = my trace copied into the image Tested with 5 Vpp, 25R load (50R external + 50R internal in scope) and 3 turns on current probe. Gives approx. 400 mApp @ 1 kHz |
| Martin72:
Hi, That looks better, but if this behavior only occurs at higher currents, it's still not for me. Apart from that, I'm disappointed with Micsig's support; they never got back to me. No, I'll wait until I can afford the Siglent Current probe: https://www.eevblog.com/forum/testgear/siglent-cp6030-current-probe-a-very-very-short-review/msg5352083/#msg5352083 Until then, I'm doing fine with my Tektronix A6302... |
| Dennis Frie:
--- Quote from: Martin72 on September 19, 2024, 09:23:13 pm ---Hi, That looks better, but if this behavior only occurs at higher currents, it's still not for me. Apart from that, I'm disappointed with Micsig's support; they never got back to me. No, I'll wait until I can afford the Siglent Current probe: https://www.eevblog.com/forum/testgear/siglent-cp6030-current-probe-a-very-very-short-review/msg5352083/#msg5352083 Until then, I'm doing fine with my Tektronix A6302... --- End quote --- Yeah I did consider the Siglent CP6030 after reading your tests. No doubt it's a better probe, but it also comes at a significantly higher price. I think the Micsig probe has its place, but the datasheet specs and graphs are misleading. |
| folays:
Hi, I've bought a brand new CP503B, is having only XX mA precision on a constant DC 30V / 2A normal ? Here below are the probe in the 6A range (correctly in the lock position !) when power supply is OFF, then ON. As you will see, under 2A of current, the probe measures an AMPLITUDE of 237 mA (24 mA at rest). Should I send back my probe ? I've bought it at Jeulin because 2 days ago Batronix didn't have it in stock, maybe I should have asked and waited... The Datasheets ( https://www.eevblog.com/forum/testgear/micsig-cp1003cp503-100mhz50mhz-current-probe/msg5260149/#msg5260149 ) says : --- Code: ---DC accuracy : ±1%±10mA (6A) --- End code --- (for info, under the 30A range, the "imprecision" (Amplitude) would jump from 237 mA to around 440 mA. Previous forum user here https://www.eevblog.com/forum/testgear/micsig-cp1003cp503-100mhz50mhz-current-probe/msg5259840/#msg5259840 shows it had (albeit at a much reduced voltage, possibly from an AC source) a Pk-Pk of 10 mA, whereas even under NO LOAD I still have much worse Pk-Pk of 24 mA. Here below is the setup of the lab power supply + the DC electronic load (which I put on a constant RESISTANCE). Maybe I misunderstood the ability of the DC load to really maintain a stable resistance (or current) under a stable power source ? For the sake of checking with a constant CURRENT setting on the DC load (no photo included, but I set the DC load on CC 2A "in the 5A and 36V range") : Much better, 175 mA of Amplitude, but it seems way off the Datasheet precision (±1%±10mA) which should have yield a measured amplitude precision of 30 mA max ? Thanks & Best Regards, |
| Navigation |
| Message Index |
| Next page |
| Previous page |