Emerson MMI-20019043 Manuel D’Utilisation
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Derived variables and calculated process variables
Table 4-15:
Derived Variable
Description
Calculated process variables
Density at
reference
tempera-
ture
reference
tempera-
ture
Standard
volume
flow rate
volume
flow rate
Specific
gravity
gravity
Concen-
tration
tration
Net mass
flow rate
flow rate
Net vol-
ume flow
rate
ume flow
rate
Density at reference
temperature
temperature
Mass/unit volume, cor-
rected to a given refer-
ence temperature
rected to a given refer-
ence temperature
✓
✓
Specific gravity
The ratio of the density
of a process fluid at a
given temperature to
the density of water at
a given temperature.
The two given temper-
ature conditions do not
need to be the same.
of a process fluid at a
given temperature to
the density of water at
a given temperature.
The two given temper-
ature conditions do not
need to be the same.
✓
✓
✓
Mass concentration
derived from refer-
ence density
derived from refer-
ence density
The percent mass of
solute or of material in
suspension in the total
solution, derived from
reference density
solute or of material in
suspension in the total
solution, derived from
reference density
✓
✓
✓
✓
Mass concentration
derived from specif-
ic gravity
derived from specif-
ic gravity
The percent mass of
solute or of material in
suspension in the total
solution, derived from
specific gravity
solute or of material in
suspension in the total
solution, derived from
specific gravity
✓
✓
✓
✓
✓
Volume concentra-
tion derived from
reference density
tion derived from
reference density
The percent volume of
solute or of material in
suspension in the total
solution, derived from
reference density
solute or of material in
suspension in the total
solution, derived from
reference density
✓
✓
✓
✓
Volume concentra-
tion derived from
specific gravity
tion derived from
specific gravity
The percent volume of
solute or of material in
suspension in the total
solution, derived from
specific gravity
solute or of material in
suspension in the total
solution, derived from
specific gravity
✓
✓
✓
✓
✓
Concentration de-
rived from reference
density
rived from reference
density
The mass, volume,
weight, or number of
moles of solute or of
material in suspension
in proportion to the to-
tal solution, derived
from reference density
weight, or number of
moles of solute or of
material in suspension
in proportion to the to-
tal solution, derived
from reference density
✓
✓
✓
Configure process measurement
68
Micro Motion
®
Model 2700 Transmitters with Analog Outputs