CW3E New Visit

Summary

SnowVUE Troubleshooting, Enclosure Rewire, Master Prog v1.1

Details

Team:

Jacob Morgan, Sally Cariveau, Nathan Stewart

Tasks Completed:

Tasks completed were:

Power cycled the SnowVUE and performed some other minor troubleshooting steps
Rewired enclosure and deployed V1.1 of the CW3E Master Program

Details:

This visit was scheduled to bring the SnowVUE back online after it stopped reporting data in early January. This time we also deployed a new SnowVUE program snippet (part of master prog V1.1) that includes code to automatically power cycle the sensor (using the SW12 port) if it reports several NaN values in a row. This requires a minor rewire of the enclosure to move the power and ground wiring for the SnowVUE from the 12V Buss to the SW12, swapping it with the power and ground wiring for the barometer.

When we first arrived on site, we connected to the logger and tried a few troubleshooting steps in theSDI12 terminal emulator. The steps were suggested by Ryan Lennon, Campbell Sci. We entered the following commands:

?! – This command will ask the sensor to return its address
aI! – This command will return information about the SnowVue including OS
aM! – This command tells the sensor to take a measurement
aD0! – This command tells the sensor to return its last measurement

The return to each command was “No response from sensor”. We then stopped the program and repeated the steps, but got the same return each time. We recorded this behaviour and reported back to Ryan.

Next, we power cycled the SnowVUE by disconnecting and reconnecting the cable from the sensor body. We confirmed that this enabled the sensor to resume measurements and that the snow depth values were accurate.

Next, we powered down the data logger at the charge controller switch and rewired the SnowVUE and barometer power wiring as follows:

Move SnowVUE brown from 12V Buss D to SW12-1
Move SnowVUE black and clear from GND Buss D to G3
Move CS106 red from SW12 -1 to 12V Buss D
Move CS106 black from G3 to GND Buss D

We then sent a new program to the data logger (Master Program V1.1) and confirmed that all the sensors were operating correctly. We also simulated a SnowVUE outage by disconnecting it's white wire from the C-port so that it reported NaNs. We confirmed that after 5 NaN values, the logger cycled power to SW12-1 using Loggernet's "Ports and Flags" window.

Future Recommendations:

Update logger OS
Update SnowVUE OS