Revision 1.4.16a Page 179
6.24.4.1 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 TLM100 will measure the distance to the
surface at each point and create a custom calibration map which relates the fluid levels to the volume
in the tank. Figure 186 below shows a screenshot of the DSM250 with the Custom Calibration option
highlighted. Custom calibration is necessary for non-rectangular tanks. 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 204 – Performing Custom Calibration of the Tank Level Monitor
The first step in custom calibration of the tank level monitor is to provide an estimated capacity of the
tank. This estimated capacity must be within +/- 25% of the actual capacity. To set the estimated tank
capacity, use the Increase and Decrease keys to adjust the displayed value until the desired value is
shown. Then, press the Accept key to confirm your selection and continue with the calibration
process. If you desire to stop the calibration process, pressing the Abort key ( ) will end the
process and return you to the Tank Levels Calibration menu.
Figure 205 – Tank Levels Calibration Capacity Estimation
