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Revision 1.4.16a Page 111
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• Custom Calibration – use for non-rectangular tanks (also, most accurate in any case, but
requires more effort)
• Rectangular Tank – By inputting some dimensions of a rectangular tank, the FPM100 is able to
interpolate the volume of liquid from the bottom of the tank to the surface.
Figure 103 – FPM100 Tank Levels Calibration Menu
6.13.2.1.6.1 Custom Calibration
The Custom Calibration setting will provide the most accurate tank level readings under any
circumstances, but it requires that you go through a process in which you gradually fill the tank,
stopping periodically to input the current fluid level. The TLA100 will measure the sender resistance at
each point and create a custom calibration map which relates the resistance of the sender with the
fluid levels. Figure 104 below shows a screenshot of the DSM250 with the Custom Calibration option
highlighted. Custom calibration is necessary for non-rectangular tanks and for non-standard values of
resistances for tank level senders. To perform custom calibration of the tank level sender, use the
Scroll Up ( ) or Scroll Down ( ) keys to move the highlighted cursor over the “Custom
Calibration…” menu item. Then, press the Enter key ( ) to confirm your selection and begin the
calibration process.
Figure 104 – Performing Custom Calibration of the Tank Level Adapter