
4Ć121FST Configuration
Original Ć June 1990 CE4.2:CL6211
MASFLW MASFLW
64
INSTRUCTION NAME: MASFLW (mass flow - ideal gas)
DESCRIPTION: This instruction incorporates the temperature and pressure of a gas, at flowing
conditions, into the linearization of an analog flow input. The input is a signal from a non-linearized
flow transmitter, and the SVA output is in engineering units. The MASFLW function differs from the
AINSQR function in that the AINSQR function assumes constant pressure and temperature,
whereas the MASFLW function handles pressure and temperature as variables.
The SVD output serves as an out of range indication. When the input is between -2 and 102
percent of span, the SVD output is 0. If the input is outside of this range, the SVD output is 1.
GRAPHIC REPRESENTATION: SYMBOLIC REPRESENTATION:
H/L
MASS
FLOW
CALCU-
LATION
OPERAND 4
OPERAND 1
OPERAND 2
OPERAND 3
OPERAND 5
NO GRAPHIC REPRESENTATION
CONFIGURATION FORMAT: MASFLW (
Pressure >>
Temperature >>
Scalar (k) >>
AIN channel >>
Eng conversion factors >>
Comment >>
OPERAND DESCRIPTIONS:
Pressure - The name of the general register or analog loadable function where the pressure (P) in
psig of the flow system is stored.
Temperature - The name of the general register or analog loadable function where the
temperature (T) in
0
F of the flow system is stored.
(Continued on next page)
Komentáře k této Příručce