Now tested Picolog 6.1.9. It worked ok over the 24 hours. No high memory or CPU use. Seems to be working ok now. Only problem I noticed was that alarm location red coloured area is off from out of range data but this is minor inconvenience.

Thanks to Hitesh for all the help!

Martyn wrote:Can you send the picolog file and the csv file to support@picotech.com the team can then take a look at the data and your configuration.

Thank you for quick response.
Sent email with files.

I tired to attach csv to this post but maximum allowed size is 256 KiB and compressed csv file is 609 KiB.
I can send it if needed.

We ordered new PicoLog 1216. We want to log light intensity changes with optic sensors which give out voltage in range 0 to 2.5V. Please see attached files. I set the alarm to be triggered when voltage drops below 0.04 V or raises above 0.06 V. Light output shoud be constant and we want to check tha...