For nearly 20 years, my employer (an OEM) used the A1SJH in a portable testing machine that required calibration of several sensors. The calibration data was stored in volatile memory, along with settings for the test. From time to time, I upgraded the control software in older machines, and this never affected the stored calibration data and only once had a minor effect on one test setting. We transitioned to the L-series (L02CPU-P) shortly before our software engineer retired. I have found that upgrading the software on the L-series also wipes out the calibration data. While this information is fairly easy to reload, I'm wondering if there is a different memory location where this type of data should be stored. The control software has the same "look" as it did with the A-series, a handful of files called main, parameters, etc. It seems the calibration data and settings are packed in these now. I'm not a programmer- I operate the help desk for our customers and lack the specialized skill we lost when my pal retired. Any ideas to fix this issue would be appreciated.