BABBITT LTM Series, Instruction & Operation Manual

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7.2 Features (Exclusive to the LTM-250/350 models)
There is a “special” menu incorporated into the LTM-250/350 models. To access this menu press and
hold the increment ( ↑) button first then while holding the increment button press and hold the enter
button for 3 seconds. A new menu will appear on the LCD screen.
ComPort:
This menu is currently only utilized at the factory and will not assist in any troubleshooting. When
the menu first appears the “No” option is defaulted, simply press enter to bypass this option. If “Yes” is selected
and this menu is accidently entered into then the push buttons will be locked out. Simply cycle the power to the
instrument to clear the effect of entering into this option.
Default:
The next menu is the “Default Configurations” menu. This option allows the user to “load” the original
factory settings or load settings saved in slots labeled “Sensor 1”, “Sensor 2” or “Sensor 3” (if utilized by end
user). If desired one electronics module can save settings for 3 other sensor probes by calibrating the
electronics module to a particular sensor probe then saving those settings into slots labeled sensor 1, 2, or 3.
Change the menu screen from “load” to “save”. Then the user can save current setting into slots labeled sensor
1, 2 or 3.
The factory settings can never be overwritten (or saved to), only load from.
Single Point Calibration (1pt Cal):
The following menu is the 1 –point Calibration option. The need may arise
to recalibrate the transmitter but a two point level simulation and calibration may not be possible in field. In
this case the single point calibration option can be utilized. Enter into the option and the next screen will display
“CrntLvl?” This screen requires that the “current level” be entered (in the engineering units be utilized). Use
the up and down push buttons to enter the current level being displayed by the level gages visual indicator and
then press enter. If the next menu appears then the operation was successful. If the menu reverts back to the
beginning of the “1pt Cal” menu then the operation was unsuccessful. Further troubleshooting may be
necessary if the operation is unsuccessful. See Section 8 for troubleshooting guide.
1 point calibration may not be within the published accuracy specification. After a 1pt Cal the
transmitter has an accuracy of + 0.10 in (+ 4mm).
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