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| Hantek CC-65 AC/DC Current Probe Teardown and Testing |
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| dcac:
I found the ut210e schematics and it does not seem to have any frequency compensation in the diff amp. From picture of the PCB C13 does not seem to be populated. |
| dcac:
Red line = Spice simulation without any caps - BW is now about 115Khz in high gain mode. Question is how much more noise this would let through. |
| dcac:
And for good measures - 10Khz square wave. Red trace = without any caps in the 272 diff amp. Remember this does not show the actual response with the HALL sensors - only what the amplifier look like in a spice simulation. |
| dcac:
New Schematic with caps values added and some notes. EDIT: Newer version of the Schematics here: https://www.eevblog.com/forum/testgear/hantek-cc-65-acdc-current-probe-teardown-and-testing/msg3545210/#msg3545210 CC-65 CLAMP4.pdf |
| Zhao:
The Hall sensor marked SE is likely to be HE12AF1D12U, a knockoff version of HW101A. "E" indicates that its sensitivity is in bin E (228-274mv @ 50mT). Marking of HE12AF1D12U chip: Taken from http://blog.sina.com.cn/s/blog_7d2f0f0a0100tv93.html Datasheet of HW101A: https://www.akm.com/content/dam/documents/products/magnetic-sensor/hall-element/in-sb-ultra-high-sensitivity/hw101a/hw101a-en-datasheet.pdf |
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