TotalFlow uFLO, User Manual, Page: 126 / 132

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Term Definition
SP See Static Pressure
Specific Gravity The ratio of the mass of a solid or liquid to the mass of an equal volume of
distilled water at 4°C (39°F) or of a gas to an equal volume of air or
hydrogen under prescribed conditions of temperature and pressure. Also
called
relative density .
SQL See Structured Query Language.
SRAM See Static Random Access Memory
SSM Acronym for Stream Selector Module.
Static Pressure Equals PSIA or PSIG. Referenced to atmospheric pressure versus
absolute pressure in a vacuum. It is defined as the pressure exerted by a
non-moving liquid or gas. In the case of a gas well this would be the
natural PSI of the gas inside of the well.
Static Random Access
Memory The place in your computer that programs reside when running. You can
access any part of the memory, and it can easily be overwritten with new
values. SRAM is much more expensive and physically larger than DRAM
but much faster.
STP Standard Temperature and Pressure
Structured Query
Language IBM developed this language in the 60’s as a way of accessing data from
a relational database. It has a very simple syntax for simple functions but
can become complex for sophisticated applications. This language is
standardized by international standards bodies, and is almost universal in
application. Almost all databases support SQL. The iVision RTDB
supports SQL and this makes it extremely flexible within a corporate
network. Authorized users throughout the organization can write SQL
statements to acquire data from this database that they need for
Marketing, Accounting, Engineering, or other functions.
Supercompressibility
Factor A factor used to account for the following effect: Boyle's law for gases
states that the specific weight of a gas is directly proportional to the
absolute pressure, the temperature remaining constant. All gases deviate
from this law by varying amounts, and within the range of conditions
ordinarily encountered in the natural gas industry, the actual specific
weight under the higher pressure is usually greater than the theoretical.
The factor used to reflect this deviation from the ideal gas law in gas
measurement with an orifice meter is called the "Supercompressibility
factor Fpv". The factor is used to calculate corrected from volumes at
standard temperatures and pressures. The factor is of increasing
importance at high pressures and low temperatures.
Supervisory Control and
Data Acquisition A common PC function in process control applications, where
programmable logic controllers (PLCs) perform control functions but are
monitored and supervised by a PC.
Surge A sudden change (usually an increase) in the voltage on a power line. A
surge is similar to a spike, but is of longer duration.
SW VBATT Switched Battery Voltage. Cycles power to equipment to save power.