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Programming
1 liter) and/or increased negative pressure (> 25 inHg/
12.5 psig).
Incorporating a negative pressure sensor, vacuum source
(typically), regulator, valves, and logic control, the Sprint iQ
handles the task of vacuum testing within a small enclosure.
Most applications can be conducted using Sprint iQ’s
pneumatically-driven internal venturi vacuum source. The venturi
means low noise, no heat, and no maintenance. Also, because the
system is so small, it can be placed very close to the test part.
With the venturi, no added floor space is required because the
vacuum source is right inside Sprint iQ’s standard enclosure.
1. The part to be tested [TP] is attached to the test port and
the test is started.
2. Positive pressure [+P] is applied to the vacuum generator
[VG] through valve [V3]. The vacuum level is set by the
pressure regulator [R1].
3. Negative pressure is supplied from [VG] to the test port by
opening valves [V1] and [V2] during the Fill step.
4. At the end of the Fill step, negative pressure is then
trapped inside the part as [V2] closes. After a slight delay,
[V1] and [V3] close allowing the line between [V1] and
[V2] to be vented to atmosphere through [V2]. This way,
any leakage through [V2] will typically cause the tester to
see this leakage and fail all tests.
5. Trapped negative pressure inside the test circuit is held
through the Stabilize step and then measured by the
tester’s vacuum sensor [VS] during the Test step.
6. If part exceeds the programmed leak tolerance (vacuum
loss over time or quantified leak rate), the tester’s display
shows why the part failed and displays the vacuum loss or
leak rate in user defined units of measure.
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