It looks like the model you have linked to does not support clamp on DC current measurement.It says "kit". You may have to assemble it.
There is one here for $14 including shipping
pilko
http://cgi.ebay.com/3-1-2-Digit-LCD...ester-NEW-/250637386789?pt=LH_DefaultDomain_0
Not many do, it takes a hall effect sensor pickup to measure a steady state magnetic field.It looks like the model you have linked to does not support clamp on DC current measurement.
hgmjr
I agree. I suspect that the kit that bear_2759 is interested in is probably not likely to measure DC current with any great accuracy for that reason.Not many do, it takes a hall effect sensor pickup to measure a steady state magnetic field.
It's not going to measure DC current at all, the pickup relies upon an AC signal flowing through the wire to act as the primary of the transformer you create with the ferrite core that has the secondary winding on it.I agree. I suspect that the kit that bear_2759 is interested in is probably not likely to measure DC current with any great accuracy for that reason.
hgmjr
I've had them for ages, got them and several plug-ins at a state surplus auction around 1977. They haven't been powered up for almost 30 years now so the main filter caps would all need to be replaced in lieu of risking what I've seen happen before. While a big electrolytic can explode it's rare, they usually build up a really high pressure which eventually ruptures the safety vent then you've got enough acrid smoke to clear a decent sized building.You bought a Tek 545? Cool. I haven't used one of those since the early 70s.
This argument cannot be correct.I was only reading around 0.64V with ~100 amps flowing through the primary leg, what I forgot to consider in the design is that the 100 turn secondary winding had a DC resistance of around 0.36 ohms.
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