Endress+Hauser RMA 422 Mise En Service page 66

Process transmitter
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:
Menu group
Mathematics channel
MATH
(differential pressure
[bar]
3
volume [m ])
TABM
Linearisation table
NOM02
Lin. point 2
.
.
.
.
NOM19
Lin. point 19
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
DISPL
Display
OUT1
Analogue output 1
(Head pressure [bar])
OUT2
Analogue output 2
3
(volume [m ])
LIM1
Limit 1
(Minimum monitoring of
head pressure)
LIM2
Limit 2
(Maximum monitoring of
volume)
64
Parameter
Curve
X-value lin. point 1
X-value last lin. point
Y-value decimal point
Y-value lin. point 1
Y-value last lin. point
Number of linearisation points
Input value
Output value
.
.
Input value
Output value
Parameter
Reference value
Reference value
Output range
Analogue output 0% scale
Analogue output 100% scale
Reference value
Output range
Analogue output 0% scale
Analogue output 100% scale
Reference value
Operating mode
Switch threshold
Hysteresis
Reference value
Operating mode
Switch threshold
Hysteresis
Set-up
MCURV TABLE
MSCLO 000,00
MSCHI 002,50
MDIDP 9999,9
MDILO 0000,0
MDIHI 2020,0
COUNM
Number and
X2
values
Y2
independent
of tank
geometry
X2
Y2
Set-up
DISOW MATH
OREF1 IN 2
RANG1 4-20
OLO1 000,00
OHI1 001,00
OREF2 MATH
RANG2 4-20
OLO2 0000,0
OH21 2020,0
LREF1 IN 2
MODE1 MIN-
SETP1 000,30
HYST1 000,05
LREF2 MATH
MODE1 MAX
SETP1 1900,0
HYST1 0005,0