Hi all,
we have a problem when logging high frequency data with our Campbell loggers. We first realized the issue on out CR3000 logger. However, even after upgrading to CR1000Xe, the issue persists.
Setup (for the CR1000Xe):
- 3x METEK uSonic-3 Class A MP
- connected using RS422 (ComC1, ComC3, ComC5)
- uSonics transmitting with 20Hz
- uSonics also logging data on internal storage (for comparison purposes)
- we use TableFile code 64 - TOB3
Problem
Around every 30min, the logger isn't able to capture the incoming data. There are ~30 lines/timestamps with NAN values (see screenshot 1). When comparing the data from the logger with the data on the METEK storage, there are two cases:
1. line simply missing (most cases)
2. temporary time shift
see screenshot 2 for example and data mapping
Some things we realized:
- the problem occurs periodically, between every 30-50min
- happens for each sensor but not at the same time
- the sensor is not the problem since data is recorded without gaps and we also streamed the raw data via USB on the laptop and didn't find any gaps
We're wondering whether the logger is simply unable to handle the amount of data, or if the issue can be resolved through code or logger settings. Any recommendations or help would be much appreciated!
Thanks a lot in advance, Alex
Can you post your code? I have a similar problem here: https://www.campbellsci.com/forum?l=thread&forum=1&tid=17663