If errors keep occurring when doing calibration, or if the purge filter is obviously damaged or extremely dirty, please replace the purge filter. The time to replace the pump filter depends on the measured concentration and the time of use. If the flow rate decreases, replace the pump filter.

Filter Replacement

1 - Turn the pump filter cap counterclockwise in the direction shown in figure and pull it out.

2 - Remove the pump filter attached to the pump filter cap.

3 - Prepare a replacement pump filter and insert it to the bottom of the pump filter cap.

*When inserting the pump filter into the pump filter cap, please insert it straight down, not at an angle.

4 - Insert the pump filter cap back and turn it clockwise to attach it.

5 - After replacement, please do the cleaning process. (See “2.3 Cleaning.”)