Siemens SITRANS LG270 Operating Instructions Manual page 43

Current output
Current output - Current
output size
Current output - Current
output adjustment
Probe type
HART mode
Special parameters
PBD-51041507
Since scaling is very extensive, scaling of the level value was divided
into two menu items.
In menu item "Current output, variable" you specify which measured
variable the current output refers to.
In menu item "Current output, adjustment" you can assign a respec-
tive measured value to the current output.
In this menu item you can select the type and size of your probe from
a list of all possible probes. This is necessary to adapt the electronics
optimally to the probe.
The sensor offers the HART modes "Analogue current output" and
"Fix current (4 mA)". In this menu item you determine the HART mode
and enter the address with Multidrop mode.
In the mode "Fixed current output" up to 63 sensors can be operated
on one two-wire cable (Multidrop operation). An address between 0
and 63 must be assigned to each sensor.
If you select the function "Analogue current output" and also enter
an address number, you can output a 4 ... 20 mA signal in Multidrop
mode.
In the mode "Fixed current (4 mA)" a fixed 4 mA signal is output inde-
pendently of the actual level.
The default setting is "Analogue current output" and the address 00.
In this menu item you gain access to the protected area where
you can enter special parameters. In exceptional cases, individual
SITRANS LG270 - Operating Instructions
43