Haii Friends,
We are faicing an isue with multiple PH analyzers with sensor 3900, all are measuring at clean water samples
On mothly calibration offset is continuesly increasing. Almost 10mv/month.
Slope still not effecting much.
While calibration, sensor is cleaning with soap and DI water.
Calibration is carrieng out with Buffer 7 and 10.
Any recomentation to prevent offset change and make sensor health longer??