VorTek SonoPro S36 Series, Instruction Manual

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Series S36 Instruction Manual Appendix F Glossary of Terms
F-2 800120
mA Milli-amp, one thousandth of an ampere of current.

Viscosity, a measure of a fluid’s resistance to shear stress. Honey has high viscosi-
ty, alcohol has low viscosity.
P Line pressure (psia or bar absolute).

The density of the liquid.
Q R S T
Q Flow rate, usually volumetric.
Rangeability
Highest measurable flow rate divided by the lowest measurable flow rate.
Reynolds Number
A dimensionless number equal to the density of a fluid
or Re times the velocity of the fluid times the diameter of the fluid channel, divided by
the f luid viscosity (i.e., Re =

VD/

). The Reynolds number is an important
number f or vortex flow meters because it is used to determine the minimum
measurable flow rate. It is the ratio of the inertial forces to the viscous forces in
a f lowing fluid.
RTD
Resistance temperature detector, a sensor whose resistance increases as
the temperature rises.
Totalizer
An electronic counter which records the total accumulated flow over a certain
range of time.
Traverse
The act of moving a measuring point across the width of a flow channel.
U V W X Y Z
Uncertainty The closeness of agreement between the result of a measurement and the true
value of the measurement.
V
Velocity or voltage.
VAC
Volts, alternating current.
VDC
Volts, direct current.