8-54 Qualitek mR Owner’s Guide
Factory-Configured Programs: Uson ships Qualitek mR with a few programs
already set up out of the 100 positions available to hold test programs.
These programs can be retained, modified, or replaced as desired.
Fill Time: The time duration to apply test pressure to the product in tests such as a
decay test (pressure).
Firmware: The set of instructions stored in programmable read-only memory
(PROM) that tells Qualitek mR how to operate. Firmware cannot be altered
by the customer.
Firmware Version (finding): The version of firmware running Qualitek mR is
briefly displayed in the startup screen when the tester is first turned on and
is also visible on the Program Mode screen.
Fixturing: A fixture is a device connected externally to Qualitek mR. Fixtures can
be mechanical, electrical, pneumatic, or combinations of all. Typical
fixtures are pneumatic clamps that seal products during a pressure decay or
flow test. Qualitek mR can supply air from the coupling ports to operate
pneumatic fixtures. Customers must specify at order whether they want
coupling pressure to be line or test pressure. Many fixturing options are
possible.
Flow Master: A measuring instrument or certified restrictor that can be connected
to Qualitek mR as part of the sensor calibration for flow. The flow standard
must have adequate accuracy, stability, and repeatability needed to
calibrate Qualitek mR. The flow standard must have current calibration
documentation if the customer requires accuracy traceability.
Flow: The amount of air passing through an object measured in cubic centimeters
or liters per time period (minute, second, or hour).
Flow Transducer: A device that converts gas flow into electrical signals. The type
of transducer used in Qualitek mR is a mass flow transducer, which is both
accurate and compensated for room temperature influences.
Flow Test: A set pressure is used to push air through a product and measure the
resultant flow sensor. Flow testing can be used in three ways:
1) Flow Leak Detection: Product is filled with air at a set pressure and then
sealed from atmosphere in a pressure decay test. Any flow above zero indicates
a leak.
(2) Flow Measurement: Air is pushed through a product at a set pressure and
allowed to flow to atmosphere. The amount of air movement through product
is measured by the flow sensor. Qualitek mR’s digital readout shows flow rate
in units that can be selected by the customer.
(3) Back-Pressure Flow Test: Many devices are constructed with large
passages that not only must remain open, but must also be open a minimum
amount to function normally when in use. In some cases, the large passages
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