ADS Environmental Services FlowAlert QR 775011 A2 - Manual (Page 174)

Maintenance and Troubleshooting 7-9
Checking the Sensor and Float Switch
Perform the following sensor inspections and service during regular
site visits:
 Verify that the installation ring or band is secure and clear of
debris.
 Scrub the pressure depth sensor with a soft bristle brush.
 Confirm that the pressure depth sensor cable is securely
fastened and free of debris, cuts, and breaks that may affect
performance. Replace a sensor that exhibits a damaged cable.
 Inspect the float switch housing for heavy grease or other
debris. Remove or wipe off any debris using a paper towel.
ADS recommends inspecting the float switch following an
event in which the float contacts the flow to ensure no debris
remains on the float.
 Inspect cable ties and other plastic fasteners for signs of
degradation, such as cracks, and replace as necessary.
Inspecting and Replacing the Pressure Depth
Sensor Dryer Tube
Inspect and replace the pressure depth sensor's dryer tube on a
regular basis. Verify the desiccant in the pressure depth sensor’s
dryer tube is still blue. Pink desiccant indicates that it will no
longer absorb moisture. If it appears pink upon inspection, replace
the dryer tube immediately in the following way:
1. Clip the cable ties securing the dryer tube to the monitor.
2. Cut the clear flexible tubing running from the dryer tube to the
pressure depth sensor connector at the location close to the
brass barbed fitting on the dryer tube.
3. Place the dryer tube with the used desiccant aside, but do not
discard.