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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

Revision 1.4.16a

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Maretron DSM250-01 user manual FPM100 Tank Levels Calibration Menu, Custom Calibration