Humboldt HM-4160 FlexPanels - Manual (Page 21)

Allow the Internal Burette to fill about 3/4 full, then turn the Fill/Drain Valves (F1,
F2, F3) and the Burette Valves (V1, V2, V3) to off. It is now assumed the Burette
Assemblies are filled with De-aired Water.
Flushing Lines from Panel to Cell
Before setting up a sample in the Triaxial Cell, allow water to flow through the
Top and Base tubes to flush air out of the lines. This can be accomplished by
turning the External Valve (E2 and E3) to External and opening the Base and
Top Valve on the Triaxial Cell. If the Base Valve is open and the Base External
Valve is on, water and bubbles of air will start flowing from the holes in the Base
Pedestal of the Triaxial Cell, and If the Top Valve is open and the Top External
Valve is on, water and bubbles of air will start flowing from the Top drain line of
the Triaxial Cell. The flushing process is complete when no additional bubbles
come from the base or the Top Cap tubes, and there are no apparent bubbles in
the tubes connecting the Cell to the FlexPanel.
Do not allow all the water to flow out of the External Burette. If it gets close to
the bottom it should be refilled to 3/4 full. Note: The cell has two top and base
drain ports and only one is being flushed with water at this time.
Triaxial Sample Set-Up
Be sure to saturate the Porous Stones and trap as little air as possible inside the
Sample Membrane. Once the sample has been set up and the Triaxial Cell cover
is in place, the Cell can be filled with water. This can be accomplished in two
ways. If the cell is going to be filled with De-aired water and the 1/4-inch tube
going to the cell is plugged into the Quick Connect (C1) these are the steps.
1) Make sure External Valve (E1) and Burette Valve (V1) are turned off.
2) Make sure the Top of the Triaxial Cell is vented to the atmosphere.
3) Turn the Fill/Drain valve (F1) to FILL and the Cell should start filling
with water.
4) When water begins coming out of the top of the Cell, turn the Fill/Drain
Valve (F1) to off.
5) Close the vent on the top of the Cell.
The Cell can also be filled with Tap Water or De-aired Water from the FlexPanel
by following these steps.
1) Unplug the Cell Pressure line from Quick Connect (C1) and plug it into the
Quick Connect (P1) below the Tap Water/De-Aired Water Valve in the Master
Control Section (4) of the panel.
2) Make sure the top of the Cell is vented.
3) Turn the Water/De-Aired Water Valve to Tap Water or De-aired Water
to fill the Cell
4) When the water begins coming out of the top of the Cell turn the
Water/De-Aired Water Valve off.
5) Close the vent on the top of the Cell.
6) Unplug the cell line from quick connect (P1) and plug it into quick connect
(C1) on the standard panel.