Erroneous conductivity readings with ADuCM3029_demo_cn0428_cn0429

[jpagliaccio]

• We are getting erroneous conductivity readings with ADuCM3029_demo_cn0428_cn0429.
• This is with the latest hex file downloaded 4/1/2021.
• We are using standard solution KCL-700, a 700 microsiemens solution.
• We are using the recommended probes - Cole-Parmer 100-series Replacement Conductivity/Temperature Probe, K=1, 59200-06 probes
• DIP switches are set to Z mode.
• Mode is changed to conductivity.
• We are getting a reading readings like 3e-07 S/cm (screenshot).
• We should be getting readings like 7e-04 S/cm.

Thanks for your help.

[jpagliaccio]

Results from Evaluation board 1 with a 1% 1.5K ohm resistor

Results from Evaluation board 2 with a 1% 1.62K ohm resistor

[adrimbarean]

This topic is discussed on the EngineerZone and it does not seem to be a software problem so far: https://ez.analog.com/circuits_from_the_lab/f/q-a/543458/erroneous-conductivity-readings-with-aducm3029_demo_cn0428_cn0429/

Will wait for the verdict on EZ and proceed accordingly from there.