SMAR LD291, Operation And Maintenance Instruction Manual

Page: 39 / 84

Programming Using Local adjustment
4.3
Complete Local Adjustment
The transmitter must be fitted with the digital display for this function to be enabled. The following
functions are available for local adjustment: Constant Current, Table Points Adjustment, User Units,
and Fail-safe, Current Trim and Pressure, Address change and some items of function INFORMATION.
WARNING
When programming using local adjustment, the transmitter will not prompt, " Control loop should be
in manual !" as it does when programming using the HART

configurator. Therefore it is a good idea,
before configuration, to switch the loop to manual. And do not forget to return to auto after
configuration is completed.
Local Programming Tree
The local adjustment uses a tree structure where, by placing the magnetic tool in
(Z) it is possible to
browse the options of a branch and by placing it in (S) ; details of the chosen option are shown. Figure
4.2 shows the LD291 available options.
Z
S
Z
NORMAL
DISPLAY
ACTION S
Z
MOVE
AROUND
Z
ESC
ESCAPE
Figure 4.2 – Local Adjustment Programming Tree – Main Menu
CONFIGURATION (CONF) - Is the option where the output and display related parameters are
configured: unit, primary and secondary display, calibration, and function.
TRIM (TRIM) – It is the option used to calibrate the "without reference" characterization and the digital
reading.
ESCAPE (ESC) – It is the option used to go back to normal monitoring mode.
The local adjustment is actived by actuation in (Z).
Configuration [CONF]
Configuration functions affect directly the 4-20 mA output current and the display indication. The
configuration options implemented in this branch are the following:

Selection of the variable to be shown on Display 1 and / or Display 2;

Working range calibration of work. Options With and Without Reference are available;

Digital filter damping time configuration of the readout signal input.

Selection of the transference function to be applied to the measured variable.