All updated parameters are held temporarily in a RAM buffer, and read back from there if interrogated. The data is permanently stored under the following conditions:
- timeout protection, 10 seconds after the last parameter modification.
- successfully enabling the logger to sample.
- executing the sleep command.
If none of these conditions are met (removal of power before timeout, for instance), parameter values may not be those expected. This could apply if, for example, a logger is programmed via USB, without internal batteries installed and relying on the USB for power. If the USB link is unplugged before the logger has a chance to save any changes made, they will be lost.