Erroneous conductivity readings with ADuCM3029_demo_cn0428_cn0429

  • 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.

Reference: github.com/.../81

Thanks for your help.

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  • 0
    •  Analog Employees 
    on May 3, 2021 8:04 PM in reply to jpagliaccio

    I'm reminded of a mistake that I made the first time I used one of these sensors. Did you remember to take the end cap off of the sensor? It's not completely obvious that it's there because it's the same color as the probe body, and if the cap is still on, it would prevent liquid from getting to the sensing electrodes.

    Thanks,
    Scott

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