ADS Environmental Services Portable FlowShark Pulse QR 775006 A2 - Manual (Page 170)

Maintenance and Troubleshooting 7-5
Bottom view of the water-ultrasonic combination sensor identifying the pressure measurement cell (1)
After uninstalling the sensor, flush the duct to the pressure measurement cell (which
is milled into the ground plate) by immersing the probe into water several times. This
prevents the accumulation of sedimentation. For more extensive cleaning, remove the
cover of the pressure measurement cell.
Do not use high pressure water (e.g., a water jet) or a screwdriver to
clean the pressure measurement cell. This could damage or destroy
the pressure cell.
Do not loosen or remove the sensor from the ground plate or cable
gland. This will cause leakage, resulting in measurement error
and/or sensor failure.
Do not remove any part of the pressure measurement cell other than
the cover. However, please be careful when cleaning an open cell.
Clean the sensor by gently moving it around in a container of water.
Never touch the probe with fingers, brushes, tools, water jets, or
similar objects. Using these items when cleaning could damage or
destroy the element and invalidate the warranty. To avoid
invalidating the warranty, please contact ADS for assistance in
cleaning the element, when necessary.
Contact ADS to perform maintenance on the sensor if sediment will
not come off the sensor, preventing the sensor from taking accurate
measurements.
The water-ultrasonic combination sensors with the pressure measurement cell are
equipped with an additional air filter element containing a dehydration agent (i.e.,
desiccant). Time, measurement intervals, air pressure fluctuations, and environmental
conditions all contribute to normal wear on the desiccant. Therefore, inspect the
element regularly and before each use, following battery pack replacement, or when
viewing data on the unit. The frequency at which to perform inspections depends on
the typical humidity present in the air and may vary between 2 and 12 weeks based on
the application. Replace the filter element or the desiccant when the desiccant begins
to change color (from blue to clear/white or pink) by more than 50%.
Replacement elements and desiccant are available through ADS.