J.P. Instruments EDM 960 Twin Pilots Guide - Manual (Page 36)

For Your Safe Flight Page 31
Example B: Aircraft has two MAIN and two AUX tanks.
Your tank capacities are: ‘MAIN = 60’ (30+30 usable)
‘AUX = 14’ (7+7 usable)
When you refuel:
‘MAIN 60.0’: use this shortcut when filling only MAIN tanks,
(! AUX tanks must be empty).
‘MAIN+AUX 74.0’: use this shortcut when filling MAIN and AUX
tanks.
(only one wing shown in each of the two scenarios)
‘MAIN+AUX 74.0’ ‘MAIN 60.0’
Main Tank
2 gal unusable
30 gal
Aux Tank
7 gal
Main Tank
2 gal unusable
30 gal
Aux Tank
Empty