ADS Environmental Services FlowShark QR 775003 A2 - Manual (Page 196)

Maintenance and Troubleshooting 8-11
Refer to Replacing EMU Components on page 8-14 for instructions
on replacing the battery pack in the EMU (for low external voltage).
Checking the Sensors
Perform the following sensor inspections during regular site visits:

Verify that the installation ring or bands are secure and clear of
debris.

Clean the face of the ultrasonic sensor gently with a soft brush,
and wipe the sensor with a clean, moist cloth.

Verify that the face of the ultrasonic depth sensor is
horizontally level with the flow. If necessary, reposition the
sensor according to the procedures in Chapter 3, Sensor
Installation and Connection
.

Scrub the pressure sensor and face of the velocity sensor with a
soft bristle brush.

Confirm that all sensor cables are neatly arranged, securely
fastened, and free of debris, cuts, and breaks that may affect
performance. Replace any sensor that has a damaged cable.
Replacing the Pressure Depth Sensor Dryer Tub or
Desiccant
The pressure depth sensor’s dryer tube contains desiccant that
absorbs the moisture from the air traveling through the dryer tube
into the clear plastic tubing leading to the pressure depth sensor in
the pipe. Replace the dryer tube or the desiccant contained within
the dryer tube on a regular basis or as necessary. Desiccant can
absorb moisture only when it is blue in color. Pink desiccant
indicates that it can no longer absorb moisture. Therefore, if the
desiccant appears either colorless or pink upon inspection, replace
the dryer tube or desiccant immediately.