SMAR ld301, Operation And Maintenance Instruction Manual

Page: 35 / 70

Section 4
4.1
PROGRAMMING USING LOCAL ADJUSTMENT
THE MAGNETIC TOOL
If the transmitter is fitted with a display, and configured for Complete Local Adjustment (using the
internal jumper), the magnetic tool is almost as powerful as the HART configuration. It eliminates the
need for a configuration tool in most basic applications.
If the LD301 display is not connected, while the instrument is in the Controller mode, no local
adjustment mode will be enabled. When the display is connected, the simple local adjustment
procedure in the controller mode is rather different from the one in the transmitter mode. In simple
mode, the complete mode functionality is restricted to the options OPER and TOTAL, only.
To select the function mode of the magnetic switches configures the jumpers located at the top of the
main circuit board as indicated in Table 4.1.
SI/COM OFF/ON
NOTE
SIMPLE
LOCAL ADJUST
COMPLETE
LOCAL ADJUST
(1) Disabled Disabled
(2) Disabled Disabled
Enabled Disabled
Disabled Enabled
Notes: 1 - HART communication is disabled.
2 - Should hardware protection be selected, EEPROM writing will be protected.
Table 4.1 – Local adjustment Selection
The transmitter has, under the identification plate, holes for two magnetic switches activated by the
magnetic tool (See Figure 4.1).
Fig. 4.1 – Local Zero and Span Adjustment and Local Adjustment Switches
The holes are marked with Z (Zero) and S (Span) and from now on will be designated simply by ( Z ) and
( S ), respectively. Table 4.2 shows the action performed by the magnetic tool while inserted in ( Z ) and
( S) in accordance with the selected adjustment type.
Browsing the functions and their branches works as follows:
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