J.P. Instruments EDM-730 Pilot's Manual page 39

Example A:
Aircraft has two fuel tanks with internal tabs.
You've preset: 'MAIN = 66' (33 + 33 usable)
'AUX = 16' (8 + 8 usable)
When you refuel:
'FILL 66': use this shortcut when filling to the internal tank tabs.
'FILL 82': use this shortcut when filling to the caps.
(only one tank is shown in each of the two scenarios)
For Your Safe Flight Page 39