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Test Parameters
Test parameters are setpoints and tolerances that tell Sprint LC how to
conduct a test and decide whether a product is accepted or rejected. Test
parameters are entered in the parameters menu.
When Test Parameters are Available
If there are existing test values, it is simply a matter of entering those
values into the Sprint LC. Once all values are set correctly, the Sprint LC
is either ready to use or ready for fine tuning.
For those users previously familiar with Sprint LC testers, a new Sprint
LC may have more features from one used previously. Some test
parameters may need adjustment to take advantage of these newer
features.
Proceeding Without Test Parameters
If there are no existing test values, it will be necessary to do some
experimenting to arrive at values for pressures, flow rates, and times best
suited to your product. Very little effort to program Sprint LC is required
after test parameters are established. Yet, coming up with test values can
take a little work when starting from scratch.
The Over-Testing Trap
Optimum setup values are typically established after trial and error when
working with known good and bad product samples. An important point is
not to over-test product by setting overly tight leak tolerances thinking that
absolutely no leak is acceptable. Experimentation may prove that a small
pressure drop occurs simply due to how the product behaves during
pressurization. Many products create conditions that merely appear to be
small leaks when pressurized.
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