Superior Signal Company LLC
AccuTrak
®
VPX-WR
User’s Manual
© 2015
22
GLOSSARY
DND
Automatic Frequency Tuning
Collimate:
To make parallel
Dynamic leak:
A leak caused by active pressure
Hermeticity:
Air tightness
Heterodyning:
A process where two signals are mixed (multiplied)
to produce two others which are their sum and
difference in frequency.
Laminar flow:
Smooth flow where the fluid is in non-mixed layers
Leak rate:
The amount of gas, in cubic feet per minute or liters
per minute
Noise:
Any unwanted signal competing with the one of
interest
Reynolds number:
An index which shows if the flow is turbulent or not.
(Numbers under 2000 are laminar and over 3000
turbulent)
SCFM / SCFH:
Standard cubic feet per minute or per hour. These
are units of flow.
Sonic sound:
Sound humans can hear
Static leak:
A leak caused by low pressure that does not
generate sound
Turbulent flow:
Random, mixed flow
Ultrasonic sound:
Sounds above the human hearing range
Viscosity:
The internal friction of a fluid or gas. The higher the
viscosity the slower the fluid moves
