Description

The Model 4340 differs from the traditional manual Densometers in several ways.
First, the Model 4340 utilizes the latest mass flow and servo-regulator technology
to provide a quick, accurate test that is oil-free. Second, pneumatic cylinders
insure both a consistent clamping pressure as well as an automatic test feature;
which allows the user to test a sample several times without constantly opening and
closing the test area by hand. Third, with the addition of an auto-drive mechanism,
the user can program the number tests as well as the span they are tested over.
Therefore, a sheet or strip of paper can be analyzed automatically, with output in
either Gurley seconds, Sheffield, Bendsten or Bekk equivalent seconds.

By utilizing several state-of-the-art mass flowmeters, in addition to a
servo-regulator, the Model 4340 can accurately test both low and high flow
materials that have traditionally tested between 0 and 50,000 ’Gurley Seconds’.
A typical test involves the Model 4340 automatically choosing the optimum test
pressure (called ’AUTO-SELECT’) based on the amount of flow recorded on the
corresponding flowmeter and then displaying the test time. At the end of each
manual test, the user can toggle between either Gurley units, Bendsten, Sheffield
or Bekk equivalent units. If an automatic test was chosen, the user can toggle
between alternate equivalent units, after the mean and standard deviation has
been calculated and displayed.

If desired, the user can predetermine the units they want displayed
(called ’USER-DEFINED’). This feature allows the user to directly compare an
older manual unit with the results achieved with the Model 4340, even though
their particular material would typically test at a different pressure and provide
different Gurley values (e.g. standard ’Gurley Seconds’ vs. high pressure seconds).