Emerson LTM-300 Mode D’Emploi

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If the user selects Revision #’s from 
the Device information screen, the 
screen to the left will display the 
revisions of the transmitter.
The bottom half of the list of Device 
information items is shown to the 
left.  The menu entry Revision #’s 
will display the various revisions of 
the transmitter.
If the user selects Device 
information from the Detailed setup 
screen, nine items are displayed 
and one additional menu option is 
displayed.  This portion of the list 
displays the items to the left.
 
If the user selects HART output 
from the Output condition screen, 
he may change the polling address 
of the transmitter and is given 
the number of request preambles 
required by the transmitter. 
If the user selects Analog output 
from the Output condition screen, 
the Alarm type is displayed and two 
options for procedures, Loop Test 
and Scaled D/A trim.  The Loop 
Test procedure is presented in the 
Diagnostics section and Scaled D/A 
trim is presented in the Calibration 
section.
 
If the user selects Output condition 
from the Detailed setup screen, 
he is presented with two menu 
selections, Analog output and 
HART output.
           The  Probe  Length  is  set  in  the  factory  when  the  unit  is 
prepared for shipment. The probe length is used as a reference 
for a number of diagnostics fuctions as well as setting the URL 
and  LRL  shown  on  the  Keypad  rerange  screens.  If  an  amplifi er 
is  changed,  it  is  important  that  this  parameter  be  set  to  the 
proper value for the probe used.
Probe Length
The Probe Length parameter may 
be found by entering the Detailed 
setup menu and selecting Sensors.
Select Probe Length  to view or edit
If the probe length is incorrect, 
provide the correct length and press 
ENTER
.
When the communicator returns to 
the Sensors screen, the SEND but-
ton is highlighted.  Press SEND to 
write the correct probe length to the 
amplifi er.
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E
MAIL
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Level Off set
 
Starting at the Sensors Screen, select 
Zero Off set and press ENTER. This 
procedure sets a 4mA point anywhere 
on the probe in reference to the end 
of the probe.
Enter the desired value of the off set 
from the bottom of the probe 
and press ENTER. This will show a 
level off set @ 4mA. i.e. 4mA will be 
reported @ 5.0” if 5.0” is selected.
 
The user must press F3 to send the 
Level Off set to the LTM300.
The LTM-300 complies with the following standards:
IEC 60079-0, IEC60079-1
EN 50014, EN 50018
LTM300IOM Rev. 6.1
3902 Magnolia Road, Pearland.  Texas.  77584