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Clarivue10 data logging problems

Home › Forums › Mayfly Data Logger › Clarivue10 data logging problems

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    • 2024-11-04 at 3:48 PM #18718
      Elliot Ma
      Participant

        We installed a ClariVUE10 turbidity sensor with a data logger in a creek a couple of months ago. It was working well and uploading data to MonitorMyWatershed.org without issues until 10/17, when it started reporting -9999 values for turbidity. We’ve verified that the sensor wiring is intact, and the internals of the logger appear to be functioning properly. The logger is still uploading battery and temperature values to MonitorMyWatershed, but the turbidity readings are now consistently stuck at -9999.

        After checking the logs, I noticed that about a week before 10/17, there were intervals where the logger would report -9999 and then return to normal values. However, as 10/17 approached, the logger began consistently reporting -9999 error values for turbidity.

        My question is, if the wiring seems okay, and the sensor/logger/code has not been touched (besides to remove debris from the sensor), what could have caused this gradual degradation of data reported by the sensor/logger? Any help would be appreciated! We definitely want to get the logger working ASAP to capture any rainfall that occurs (if it ever does end up raining, haha).

        Thanks!

        Elliot

      • 2024-11-06 at 12:30 PM #18730
        Shannon Hicks
        Moderator

          I assume you are using a Mayfly v1.1 board and not an older v1.0, because it had a hard time providing a stable 12v for that particular type of sensor.  But are you using the onboard 12v source by selecting 12v on the Grove voltage selector jumper, or are you using one of the new screw terminal boards that has its own 12v boost circuit on it?  And have you put a voltmeter on the power wires going to the sensor when it’s on to verify that it’s receiving 12volts?

        • 2024-11-08 at 4:19 PM #18731
          Elliot Ma
          Participant

            Yes we are using a Mayfly v1.1! As for the 12v source, I am not too sure. I did not put the board together originally so it’s been operating how it’s been since it was put into place.

            I will be back soon to check on it again with a voltmeter. Could you explain how I can check if it’s using the correct 12v configuration?

            Much appreciated,

            Elliot

            • 2024-11-11 at 5:01 PM #18738
              Shannon Hicks
              Moderator

                When the sensor is powered, you should be able to put the two probes of a voltmeter on the little screws on top of the screw terminal board where you’ve connected the ClariVue’s cable to the Mayfly.  Put the black probe on the Gndscrew and the red probe on the V+ screw.   You’ll know the sensor is being powered when the red LED on the bottom left corner of the Mayfly board is lit  (the one labeled Switched Power Out).  You can put the Mayfly into test mode by pressing (for one second) the D21 pushbutton next to the microSD card socket.  That’ll wake the Mayfly (and keep it awake) for a few minutes, constantly keeping the output power on and will also output sensor data to the serial monitor every 10 seconds or so.  Putting it in this mode will give you time to check the output voltage with a meter.

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