Emerson Magtech LTM−350 Series Instruction And Operation Manual page 16

August 2020
the protruding screws (spanner screws) to pull out
the electronics module. Alternate pulling on the
screws in order to prevent damage to the
electronics module.
3. Rotate the electronics module 180° and insert it
back into the enclosure. The module should now be
right side up.
Do not twist or rotate the transmitter housing to adjust
the conduit entry. The conduit entry must be left in the
opposite position.
4. Go into the "advanced" configuration menu by
holding the increment ( ) button and the enter
button together for 3 seconds. The menu should
read "ComPort", release the buttons.
5. Press the Enter button to bypass the menus until
the "FlipPrb?" (Flip Probe) menu appears. Use the
up or down buttons to select "Yes" and press Enter.
6. When "Yes" is selected the next menu is the
"Config" (Configuration/Orientation) menu. This is
where the "Top" or "Bottom" mount configuration is
selected. This configuration/orientation is with
reference to where the sensor probe "bulkhead" is
located on top or bottom. Select the appropriate
"Config" and press enter. If the original orientation
is selection the menu will revert back to "FlipPrb?"
menu.
7. The next menu is "Rerange?" (Change Range) menu.
Select "Yes" if the measuring range (or span) is
changing from the original span. Select "No" if the
span is to able to remain the same. Selecting "Yes"
will then go through change range procedure
discussed in section 5.1 of this manual.
8. After the "Rerange?" menu is the "CrntLvl?" (current
level) menu. Simply enter where the existing level is
in the vessel and a one-point calibration will take
place automatically and the next menu will appear.
If the next menu appears then the operation was
successful. If the menu reverts back to the
beginning of the "FlipPrb" menu then the operation
was unsuccessful. Further troubleshooting may be
necessary if the operation is unsuccessful.
Section 6 for troubleshooting guide.
Change Signal (ChngSgnl):
The next and final menu in the special features menu is
"ChngSgnl" or change signal option. The feature allows the
adjustment of the signal being sent down the sensor probe.
It can be utilized when one electronics module is being
utilized to save settings for various different length sensor
probes.
This menu has 3 parameters that can be adjusted. The first
is "Energy" [%], it is increased for a longer sensor probe and
decreased for a shorter sensor probe. The second parameter
is "DCOffset" or DC Offset [v], this is the DC voltage that the
signal is offset by. It is useful for eliminating some noise.
This parameter is usually left at 2.5 V. The third (and final)
parameter is the "HoldTime" or hold time [µs], this is how
long the Energy is held for. This parameter is recommended
to stay within a certain range.
Changing Signal Parameters"
There is purposely not much detail on this option as it
is recommended that these parameters not be changed
unless the electronics module is being utilized for more than
one sensor probe.
be guided by the factory if this option is being utilized.
This option is also intended for mainly factory use.
Changing these parameters can cause undesirable results.
Please consult factory with any questions. The "factory"
default configurations can be loaded if the parameters have
been drastically changed.
Pulse Width Filter (PW Filtr):
The pulse width filter can be utilized for dual output (level
and interface) applications if there are any erroneous
readings being transmitted or displayed. This feature can be
adjusted so the unique signal from the magnetic float can
be concentrated on and all other false signals are ignored.
This option/feature only appears in software revisions
1.01.15 or higher.
This
1.02.00 to show the average pulse being detected to help
better set the PW filter.
See
16
Reference Manual
L231040 Rev AD
Also see section "6.3
It is also recommended that the user
option was revised in software revision