Thanks Finn.

I’ll add the 2 zeners to the EC3 and test it.
I thought the reprogramming of the chips was right.
MPLABS reported them to be good.

Steve

On 23 Jun 2020, at 9:56 pm, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:

Attached is an excerpt of the EC3 CAS input conditioning circuit without added clamping circuit and with.

Finn

On 6/22/2020 10:02 PM, Stephen Izett stephen.izett@gmail.com wrote:

Thanks Finn. Did you previously give us a the circuit? Do you have a sketch of it?
  I’ll mod the EC3 and see if that is the problem.

Cheers

Steve Izett

<EC3 CAS input with clamp.pdf><EC3 CAS input.pdf>--
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