KEP ES749 - 11. Glossary of Terms

ES749 Flow Computer
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11. Glossary of Terms
Access Code
A numeric password which is entered by a user attempting to gain entry to change setup parameters.
AGA-3
A empirical ow equation applicable to orice and several other square law owmeters.
AGA-5
A gas ow equation for computing the combustion heat ow from measured volume ow, temperature and pressure as well as
stored gas properties.
AGA-7
A gas ow equation for pulse producing, volumetric owmeters which computes the equivalent ow at reference conditions
from the measurements made at owing line conditions.
Assign Usage
A menu selection during the setup of the instrument which selects the intended usage for the input/output.
Barometric Pressure
An entry of the average, local atmospheric pressure at the altitude or elevation of the installation. (typically 14.696 psia)
Beta
A important geometric ratio for a square law owmeters.
Calibration
An order sequence of adjustments which must be performed in order for the equipment to operate properly.
Calibration Temperature
The temperature at which a ow sensor was calibrated on a test uid.
Combustion Heat
The energy released by a uid fuel during combustion .
Default
A value to be assumed for manual inputs or in the event of a failure in a input sensor.
Display Damping
An averaging lter constant used to smooth out display bounce.
DP Factor
A scaling constant for a square law owmeter.
Error Log
A historical record which captures errors which have occurred.
Flow Equation
A recognized relationship between the process parameters for ow, temperature, pressure and density used in ow
measurements.
Galvanic Isolation
Input and or output functions which do not share a conductive ground or common connection between them.
Gas Cor. Vol Eq.
An equation where the corrected volume ow of gas at STP is computer from measured volume ow, temperature and
pressure as well as stored gas properties.
Gas Comb. Heat Eq.
An equation where the combustion heat ow of gas is computer from measured volume ow, temperature and pressure as
well as stored gas properties.
Gas Mass Eq.
An equation where the mass ow of gas is computer from measured volume ow, temperature and pressure as well as stored
gas properties.
Flowing Z-Factor
The mean Z-Factor under owing conditions of temperature and pressure for a specic gas.