User Manual

6 OPERATION
66
OPTIWAVE 7400-24 C
www.krohne.com 12/2015 - 4003518001 - MA OPTIWAVE7400-24-R01-en
2.3.6 DIST.PIECE Optional distance piece between the
converter and the process connection. This
is for high-temperature applications more
than +150°C / +302°F. The distance piece is
120 mm / 4.7¨ long. For more data, refer to
Technical data on page 90.
min: 0 mm / 0¨
max: TANK HEIGHT
1
2.3.7 Reference offset. Offset relating to a
reference location (distance). This value is
positive when the reference location is
above the device flange face and negative if
below. For more data, refer to Distance
measurement
on page 74.
min-max:
-tank height…50 m /
-tank height...164.05 ft
0m/ 0ft
2.3.8 Tank bottom offset. Offset relating to a
reference location (level). The device
reference point for this parameter is the
bottom of the tank (set in menu item
C.1.2.0). This value is positive when the
reference location is below the tank bottom
and negative if above. For more data, refer
to
Level measurement on page 75.
min-max:
-tank height...3000 m /
-tank height...9843 ft
0m/ 0ft
2.4.0 OUTPUT I
2.4.1 OUTPUT FUNC. The output function. Select an output
function to scale the current values in
relation to a given point (usually the device
process connection or the tank bottom). The
output current value is shown on a bar
graph in normal mode if the measurement
type is the same as the output function.
Conversion parameters are shown
(Conversion, Ullage conversion) if there is
level-volume, level-mass or level-flow rate
data in 2.8.1 INPUT TABLE.
Distance, Level,
Conversion, Ullage
conversion, Reflection
1
2.4.2 RANGE I This menu item sets the limits of the output
current range to 1 of the 2 available options:
standard limits (4...20 mA) or NAMUR
NE 43-compliant limits (3.8...20.5 mA). It
also tells the device what to do if an error
occurs. if you set RANGE I to 4-20/22E
4-20/22E4-20/22E
4-20/22E and
an error occurs (e.g. the tank is too full, ...),
the device output current will change to an
error value of 22 mA . If you set RANGE I to
4-20
4-204-20
4-20 and the device senses a measurement
error, the value will stop at the last correct
measurement.
4-20, 4-20/22E, 4-
20/3.6E, 3.8-20.5/22E,
3.8-20.5/3.6E
4-20/3.6E
2.4.3 SCALE 4mA This gives a measurement value to 4 mA. min.-max: 2
1
2.4.4 SCALE 20mA This gives a measurement value to 20 mA. min.-max: 2
1
2.4.5 ERROR DELAY The time after which the current output
changes to an error value. The error value
shows that there is a measurement error.
mn=minutes and s=seconds.
0 s, 10 s, 20 s, 30 s, 1 mn,
2 mn, 5 mn,15 mn
0s
2.5.0 APPLICATION
2.5.1 TANK TYPE The conditions in which the device is used. If
the surface of the product is flat, select
"Storage". If the surface of the product is
disturbed, select "Process". If the surface of
the product is agitated with vortexes and
foam, select "Agitator".
Storage, Process,
Agitator
Process
Menu
No.
Function Function description Selection list Default