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Description
The PTS100 is a floor standing, self contained
test system designed to measure the
porosity of prepared samples. It uses a rateof-
rise technique, measuring the porosity of
the sample to air or another gas by ‘leaking’ gas
through the sample into a volume. Flow through the sample is determined
using
fundamentals of volume, change in pressure
and time.
The rig accurately measures the absolute
pressure on both sides of the sample, and an electronic timer automatically
measures the time
between two pre-selected vacuum levels. In the example above the customer
specified a mechanical
pressure gauge be fitted to allow comparison with older equipment. However,
the response time of
this type of gauge introduces significant errors.
In operation the user
can select different
volumes or volume
combinations to give
good accuracy over a
range of flows, and
reduced inlet pressure
can be used for delicate
samples. An oil free
vacuum pump is fitted
to evacuate the volumes
without the risk of
contaminating samples,
making the unit completely
self contained. |
