MAAP pressure sensor

[angela.marinoni]

Hello everybody,

we are experiencing a recurring error on our MAAP at Monte Cimone.
The error code is 0000 0000 0100 8000 (filter change condition already met immediately after filter change and flow deviation >5%).

When the error apperars, by checking into the instrument menu, the absolute sensor pressure is completely out of range (over 10 000 hPa) and flow much higher then set up (around 25 lpm, measured with esternal flowmeter) despite the 7-8 lpm reported in the data file. After sensor pressure re-calibration with the ambient pressure value, the flow immediately reaches a value close to the set one (16.67 lpm) and error disappears. Ubfortunately it comes back after a while (4 times in the last three months).

Did you already experienced this behavior?

I thought i need to change the absolute pressure sensor.
Have any of you already changed it and know its brand and model?

Any suggestion will be greatly appreciated
Many thanks for your help

Best Regards
Angela