Humboldt HM-4160 FlexPanels - Manual (Page 25)

3) Place cell in load frame and take reading on pore pressure transducer.
4) Take other appropriate steps outlined in the ASTM Standard D4767 or any
international standard.
5) For a undrained triaxial shear test, close the Drainage Valves on the
bottom of the Triaxial Cell, not those going to the pressure transducer.
Hydraulic Conductivity of Triaxial Sample
The following steps can be taken after back pressure saturation or consolidation
to set the panel up for Hydraulic Conductivity. There are additional steps to be
taken when running the test but they will depend on the type of test being run
and the specific equipment being used with the FlexPanel.
1) Lift the Toggle Valve (T3) under Pressure Regulator (R3) in section 3 (Top).
Adjust the Pressure Regulator (R3) to read the same pressure as Pressure
Regulator (R2) in Section 2 (Base). Close the Toggle Valve (T3).
2) Turn the Selection Valve (A3) in Section 3 (Top) to Pressure.
3) Turn the Bridge Valve (BV) to off.
4) Set the Head Pressure across the sample by adjusting Regulator (R2) in
Section 2 (Base).
5) Make adjustments to the effective stress on the sample using the Pressure
Regulator (R1) in Section 1 (Cell).
6) Monitor the flow of water in and out of the sample using the Burettes in
Sections 2 (Base) and 3 (Top).
7) When adjusting water levels in the Burettes, close the Drainage Valve on the
Triaxial Cell first. Turn the Selection Valve (A2) and (A3) to Vent, then use the
Fill/Drain to adjust water level in Burette.