SMAR ld301 - Zero and Span Reranging; Complete Local Adjustment; Local Programming Tree

Programming Using Local Adjustment
4.3
Zero and Span Reranging
The LD301 working in the transmitter mode can be very easily calibrated. It requires only Zero and
Span adjustment in accordance with the working range.
To make these adjustments, the instrument must be configured as "transmitter" (XMTR).
Via HART configurator or by using item "MODE" in option "CONF" of the local adjustment; the jumpers
shall be configured for simple local adjustment. In case the LD301 display is not connected, the simple
local adjustment is automatically activated.
Zero calibration with reference shall be done as follows:
 Apply the Lower Value pressure.
 Wait for the pressure to stabilize.
 Insert the magnetic tool in the ZERO adjustment hole. (See Figure 4.2)
 Wait 2 seconds and soon the transmitter should be reading 4 mA.
 Remove the tool.
Zero calibration with reference does not affect the span. In order to change the span, the following
procedure shall be observed:
 Apply the Upper Value pressure.
 Wait for the pressure to stabilize.
 Insert the magnetic tool in the SPAN adjustment hole.
 Wait 2 seconds. The transmitter should be reading 20 mA.
 Remove the tool.
Zero adjustment causes zero elevation or suppression and a new upper value (URV) are calculated in
accordance with the effective span. In case the resulting URV is higher than the Upper Limit Value
(URL), the URV will be limited to the URL value, and the span will be automatically affected.
NOTE
On elevation or suppression measuring configure the user unit to facilitate the local reading.
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, Fail-safe, Current Trim and Pressure Characterization Trim, Totalization Parameters;
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 using the HART configurator for programming. Therefore it is a good
idea, before configuration, to switch the loop to manual. And do not forg
et 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
4.3 - Local Adjustment Programming Tree
shows the LD301 available options.