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The STDDPC, typically operating at 3MPa/200cc, provides a
cost-effective direct replacement for conventional soil mechanics
laboratory pressure sources and volume change gauges. Above all, the
device has its own computer interface and so can be controlled
directly from a computer. It is ideal as a back pressure source
where it can also measure the change in volume of the test specimen.
Also, it automatically protects itself from pressure and volume
over-ranges. In stand-alone mode,
the instrument is a constant pressure source which can replace
traditional laboratory pressure sources such as mercury column,
compressed air, pumped oil and dead weight devices. It is also a
volume change gauge resolving to 1 cu mm.
In addition, the instrument can be programmed through its own
control panel to RAMP and CYCLE pressure or volume change linearly
with respect to time. This means the device is
also ideal for permeability testing by constant rate of flow or
constant head.
A data logger can be connected to an
analogue interface option which provides output readings of pressure
and volume change.
Compressed air is not required with the
STDDPC.
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