2
OPERATION
2. OPERATION
Please read all instructions before operating the HYDROS 21 to ensure it performs to its
full potential.
PRECAUTIONS
METER sensors are built to the highest standards, but misuse, improper protection, or improper
installation may damage the sensor and possibly void the manufacturer’s warranty.
Before integrating HYDROS 21 into a system, make sure to follow the recommended installation
instructions and have the proper protections in place to safeguard sensors from damage.
2.1 INSTALLATION
The two most common installation methods for the HYDROS 21 are (1) groundwater well
installation and (2) surface water installation. Hydrology studies using monitoring wells or
piezometers are only as good as the well installation design. It is important to use properly
designed wells to obtain accurate data and for proper sensor operation.
While installing the HYDROS 21, accommodate for the following considerations:
• Biofouling can affect sensor performance. One way to mitigate the accumulation of
microorganisms, plants, and algae is to wrap the sensor with a copper mesh. Inspect and
clean the sensor more frequently in these conditions.
• Buildup of sedimentation or debris around the sensor will cause inaccurate measurements
and potential damage. Ensure the sensor installation is high enough to avoid becoming
buried in sediment.
• If the sensor is in water, it must not experience temperatures below 0 °C (32 °F). If water
freezes in the pressure transducer cavity, the pressure transducer will be permanently
and catastrophically damaged by the ice formation. Freezing is not generally a problem
in deep underground well installations but might be an issue in surface water wells and
underground installations above the frost depth.
WARNING! Exposing the HYDROS 21 sensor to freezing temperatures with water in the pressure transducer cavity
voids the sensor warranty.
Follow the steps listed in
to set up the HYDROS 21 and start collecting data.
Table 1 Installation
Tools Needed
Zip ties
Measuring tab
Reference document on well design
