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Using ADALM1000 AIN and CHA as kelvin connection

Category: Hardware
Product Number: ADALM1000 rev.F
Software Version: Raw pyhton command lines

Hi, I m having some issue trying to use ADALM1000 as a kelvin connector. I want to get accurate force voltage at CHA. 

At board revision F, I found that I can open S4 with: 

devx.ctrl_transfer(DevID, 0x40, 0x51, 34, 0, 0, 0, 100)

Then I made a proof test with 2 series resistors like below: 

In this case, If I apply 1V at CHA and measuring half of this voltage at AIN, I was expecting to have something close to 2V at CHA, while having accurate 1V at AIN. But I always get 1V at CHA. What am I missing?

Thanks in advance.

proof test reloaded
[edited by: dpmioni at 8:04 AM (GMT -5) on 13 Feb 2023]