3
2. PRIOR TO INSTALLATION
2.1 Saturating the Filter Stone
1)
Disconnect the Swagelok union at the transducer.
2)
Immerse the whole assembly, upside down, in a bucket of water.
3)
Apply a vacuum to the nylon filter tube using the large syringe supplied with the system.
This removes the entrapped air from the large filter stone.
4)
Purge the transducer of air by injecting water into the Swagelok fitting as follows:
a)
Fill the syringe with water.
b)
Attach the small diameter tube supplied with the system to the syringe.
c)
Push the tube all the way down inside the Swagelok fitting and into the piezometer
cavity.
d)
Inject water from the syringe into the piezometer cavity.
5)
With the assembly still under water, reconnect the nylon tube from the filter stone to the
transducer. Tighten the Swagelok per the instructions in Section 2.2.
6)
Keep the assembly under water until ready to lower into the borehole.
Caution! Do not allow the piezometer to freeze once it has been filled with water.
2.2 Swagelok Tube Fitting Instructions
These instructions apply to
one inch (25 mm) and smaller fittings
.
2.2.1 Installation
1)
Fully insert the tube into the fitting until it bumps against the shoulder.
Figure 4 - Tube Insertion
2)
Rotate the nut until it is finger-tight. (For high-pressure applications as well as high-
safety-factor systems, further tighten the nut until the tube will not turn by hand or
move axially in the fitting.)
3)
Mark the nut at the six o’clock position.
