Master Control Panel combines precise control, logical layout, and quality components for accuracy and ease of operation for both triaxial shear and flexible-wall permeability testing.
Control Panels for triaxial shear and flexible-wall permeability testing use a system of burettes, valves, and regulators to precisely regulating air and fluid pressures in Testing Cells. They provide a central point for supply connections of air, water, and drains with a logical layout and are built with quality components.
Controls in the upper half of the panel regulate air pressure to the specimen chamber while the lower controls regulate the water supply. Precision regulators set and control pressures during saturation, consolidation, and testing phases, and zero-displacement ball valves are used for positive shutoff. Two 50cc burettes with 0.1cc graduations for flow measurement and two 4cc pipettes with 0.008cc graduations are included. These are located inside two storage chambers which have an additional capacity of 400cc each.
Effective cell pressure and cell and sample back-pressure are all controlled through a single regulator. This is particularly useful during the saturation phase and causes no change in effective stress. Connections for the test cell and reservoirs are conveniently located on the front to allow easy filling and draining. Main supply connections for water, air, and drain are located at the rear of the panel. To control additional Triaxial or Flex-Wall Permeability Test Cells, an HM-350A Auxiliary Panel can be connected to the Master Panel. Up to two Auxiliary Panels can be connected to a single Master Panel.
The sturdy powder-coated aluminum frame is 21x6.25x37.25in (533x159x946mm), WxDxH. Accurate measurement of pore pressure for correction and control of loads and loading rates can be accomplished with the optional HMA-521 Digital Pore Pressure Gauge. A transducer is included with this gauge. Other optional accessories include the HMA-506 Specimen Height Indicator to track sample deformation and the HMA-520 Deairing Tank to prepare water for use in the testing chambers. Triaxial Cells and Flexible-Wall Permeability Test Cells and other accessories are ordered separately. An air compressor is required to generate confining pressures, but not included.
HM-350M includes a factory-installed digital readout for setting test cell and sample pressures in psi units.
HM-350MF includes a factory-installed digital readout for setting test cell and sample pressures in kPa units.
Click here for Triaxial/Permeability typical setup.
Features:
- Provides accurate regulation of air and fluid pressures for one triaxial or flexible wall permeability test cell
- Individually adjustable cell and burette pressures
- Equipped with digital readout
- Sturdy powder-coated aluminum frame
- Auxiliary Panels allow simultaneous testing of multiple samples
- Chamber and reservoirs can be filled and drained with front panel access
Included Items:
- Master Control Panel with psi or kPa Pressure Readout
Accessories:
- Triaxial Cells are available with brass or stainless steel fittings and can accommodate test specimen sizes ranging from 1.4 to 6in (36 to 152mm).
- Flexible Wall Permeability Cells are used for conducting tests on specimens that have been saturated with water, and are similar to Triaxial Cells but do not have a loading piston.
- HM-350A Auxiliary Control Panel for Triaxial & Permeability Tests allows for additional triaxial or permeability test chambers to increase productivity
- Deairing Tanks are available with a 1.5 or 5.0gal tank capacity and are used to remove entrapped air from water in the testing process
- HMA-521 Pore Pressure Transducer with Digital Readout for precise measuring of soil specimen pore pressure
