In most cases, missed samples are due to issues with either the reading interval or Data Logger power.
Collecting data from multiple instruments can take a significant amount of time. If the Data Logger is in the process of collecting data when the next sampling interval comes around, it will ignore the new request for samples and complete its current data collection. It will then collect again when it receives another request for samples at the next available interval.
In order to avoid this issue, make sure to know how long it takes to collect data from all sensors attached to the Data Logger. See 'Collecting Data from the CS Data Logger' section of the LoggerNet manual for recommended ShapeArray (SAA) reading intervals.
Note: The Data Logger can collect properly for an extended time, then fail as “housekeeping” functions of the Data Logger accumulate and start competing for Data Logger resources.
Data Logger Power
If the Data Logger power is too low, it can stop functioning. For Data Loggers which are connected to batteries with solar panels, it is sometimes possible for the battery to be recharged enough for the Data Logger to regain power. If the Data Logger program is set to run on Power-Up, it will resume collecting data but there will be gaps in these data.
To avoid this issue, make sure to periodically check the Logger Diagnostics table to ensure that the voltage is above 11.5 V.