Smart PFM measuring cell cleaning

A guide on how to clean the measuring cell if high or inaccurate reading are experience

Cleaning the cell is a simple process that requires only a bottle brush and a mild acid such as orange juice, vinegar or cola. These acids are preferred as they are safe to both the operator and the equipment. All power, air, sample and fresh water must be isolated prior to cleaning the measuring cell. 

After ensuring that all supplies are isolated,  drain the cell.

Next, detach the Autoclean/manual clean  from the top of the cell and isolate both the inlet and outlet connections.

The measuring cell can now be filled with the mild acid such as orange juice, vinegar, cola or the Rivertrace cleaning kit. This is safe to both the operator and the equipment. This should be left for a minimum of 12 hours before cleaning the inside of the glass tube with a soft bottle brush. 

After thoroughly cleaning the interior of the cell with a soft bottle brush, proceed to drain the cell completely.

Reconnect all pipework:

Reattach all pipework and the Autoclean/Manual clean component. It is important to avoid overtightening; ensure that the fitting is hand-tightened fully and then loosened by half to one full turn.

Now flush the system with fresh water for approximately 30 minutes. This will flush the measuring cell and properly and also flush the fresh water supply line to the Smart PFM  monitor which are prone to corrosion / debris build-up through sporadic usage.

After flushing, verify that the PPM level has been reduced to a suitable level of 0ppm.