Reference 8-57
calibration documentation if the customer needs to prove accuracy
traceability.
Pressure: The relative force of a compressed air or gas. Qualitek mR is generally
configured to use PSIG, which is the force of compressed gas relative to
barometric pressure.
Pressure Transducer: An electro-mechanical device (also called a sensor) that
converts pneumatic pressure into electrical signals. Qualitek mR’s pressure
transducers are rugged, accurate, repeatable, and have a very low internal
volume.
Programming: Entering values to setup the tester. Also called setup or data entry.
Program: Data (such as test pressure, test time, and reject levels) entered by the
user and stored in nonvolatile RAM. A program is setup in Qualitek mR’s
parameters screen. When multiple programs are linked, the programs
become a test cycle. See also Stored Programs.
PSIG: Pounds per Square Inch Gauge. A unit of measurement for air pressure
measured with respect to local atmospheric pressure.
Pneumatic SNR: Pneumatic Signal/Noise Ratio. The larger the PSN Ratio, which
is the Cal Value divided by the Comp Value, the more repeatable the test
will be. The PSN Ratio can be in the range of 0.2 to 0.25 if ±10% test
repeatability is sufficient.
Ramp Up: To slowly increase pressure by routing test pressure through the flow
control valve located on the back of Qualitek mR. Various ramp rates can
be established by adjusting Qualitek mR’s built-in flow control.
Rise Test: A test type which can be either a pressure rise or vacuum rise test. The
results are expressed as a positive value if the pressure change is in the
expected direction or negative if otherwise. E.g., a typical pressure decay
test will have a positive value consistent with a positive pressure delta
where the pressure is actually decreasing.
RS-232: A serial communications protocol used by most computers and computer
peripherals. Qualitek mR uses an RS-232 protocol to send test result data to
printers and computers.
Run: When the security lock is in the horizontal position, Qualitek mR is in Run
Mode. Qualitek mR is set to run when used in production testing. The only
other keyswitch condition is Program Mode (security lock in vertical
position).
Run Display: The Run Display is the screen visible when the lockout key is in run
(horizontal) position. This display is visible to the operator during testing.
Sealed Component Test: If a test component is completely sealed, and has no
ports or openings, it can be tested using the sealed component method. The
component is tested by placing it in a custom-built test chamber. The
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