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Flow Testing
Introduction
A flow test continuously supplies air to a product under test and measures
the amount of air flowing through the product and going to atmosphere. In
a flow test, Sprint LC uses at least one mass flow sensor to measure the air
flow, and a pressure transducer to monitor the air pressure.
The flow test can be configured to measure air flow through a product and
to pass that product if air flow is between a minimum and maximum
tolerance in a program. Figure 52. Flow tests are often used to check for
blocked passages in small tubing and other low-flow devices.
Most parameters in a flow test are the same as a pressure decay test with
three exceptions. (1) A flow test has no stabilization phase. (2) Instead of
one reject level, a flow test has both minimum and maximum flow
setpoints. (3) Pressure error is checked only at the end of test time. Figure
53.
FIGURE 52
Fill Test
Zero
Couple
Flow Measurement Pass
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