3. Allocating the volume to the differential pressure using the
linearisation table of the mathematics channel. Special tank
forms can be described using a further 18 linearisation points:
Further parameters in order to complete the measurement
point, such as measured value display on the unit, analogue
value output and set point alarm monitor:
Menu group
Parameter
Set-up
Mathematics channel
MATH
(differential pressure
[bar]
➠
volume [m
3
])
Curve
MCURV
X-value lin. point 1
MSCLO
X-value last lin. point
MSCHI
Y-value decimal point
MDIDP
Y-value lin. point 1
MDILO
Y-value last lin. point
MDIHI
TABLE
000,00
002,50
9999,9
0000,0
2020,0
Linearisation table
TABM
Number of linearisation points
COUNM
Number and
values
independent
of tank
geometry
Lin. point 2
NOM02
.
.
.
.
Lin. point 19
NOM19
Input value
X2
Output value
Y2
.
.
Input value
X2
Output value
Y2
Menu group
Parameter
Set-up
Display
DISPL
Reference value
DISOW
MATH
Analogue output 1
OUT1
(Head pressure [bar])
Reference value
OREF1
Output range
RANG1
Analogue output 0% scale
OLO1
Analogue output 100% scale
OHI1
IN 2
4-20
000,00
001,00
Analogue output 2
OUT2
(volume [m
3
])
Reference value
OREF2
Output range
RANG2
Analogue output 0% scale
OLO2
Analogue output 100% scale
OH21
MATH
4-20
0000,0
2020,0
Limit 1
LIM1
(Minimum monitoring of
head pressure)
Reference value
LREF1
Operating mode
MODE1
Switch threshold
SETP1
Hysteresis
HYST1
IN 2
MIN-
000,30
000,05
Limit 2
LIM2
(Maximum monitoring of
volume)
Reference value
LREF2
Operating mode
MODE1
Switch threshold
SETP1
Hysteresis
HYST1
MATH
MAX
1900,0
0005,0
Process transmitter
64
Содержание RMA 422
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