Products > Test Equipment
Accurate Low Amp Current Probe Advice
KungFuJosh:
--- Quote from: MarkL on November 08, 2024, 05:13:36 pm ---I know we're talking about the AM503B in this thread, but since I have it set up I thought I would share what the drift looks like on the older AM503. Same test scenario, and using the same A6302 probe.
--- End quote ---
The main focus of the thread was for the probe, which I settled on the A6302. It's good to see data with different amps with it...and I'm glad I got the 503B, even if it did need some work. 😉
KungFuJosh:
Stability Test 3 Setup:
SPD3303X at 3.05V with a 100Ω CMF resistor.
SDM3055X-E in-circuit for current reference.
A6302 on negative lead of PSU.
AM503B connected to SDM3065X via 50Ω termination.
PP (min and max values): 235.5826µV over ~50 minutes.
Thanks,
Josh
Kean:
--- Quote from: KungFuJosh on November 08, 2024, 03:00:01 am ---The red trace is an SDM3055X-E. The blue trace is the SDS2404X HD. The settings are identical between both stability tests, except I think the 2nd test sampled more frequently (log rate in TC).
--- End quote ---
Ah, sorry. I recognized the screenshot as being TestController, but it didn't register that the measurements were from two different devices. I was thinking you were showing before and after.
MarkL:
--- Quote from: KungFuJosh on November 08, 2024, 09:23:19 pm ---Stability Test 3 Setup:
SPD3303X at 3.05V with a 100Ω CMF resistor.
SDM3055X-E in-circuit for current reference.
A6302 on negative lead of PSU.
AM503B connected to SDM3065X via 50Ω termination.
PP (min and max values): 235.5826µV over ~50 minutes.
Thanks,
Josh
--- End quote ---
So... If you're still using 10mA/div to be comparable with previous tests, that's a drift of 0.235mA. Half of what I was getting. Not bad!
Edit: Ah, right. The numbers say it was 10mA/div. Great!
Martin72:
A good result that I am tempted to reproduce.
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