GE AutoSigma 3000 DL Technical Reference, Operating Manual page 46

Operation
Hit OK. On pressing return on the keyboard the screen
should respond with >.
– To select User type USER (slowly; 0.5 sec between
characters) and press return; the unit will now be in
the User mode and can be disconnected from the
PC.
In User mode the menu cannot be selected and the
settings present when the AutoSigma 3000 DL is con-
verted will be retained.
– To select Supervisor, with the PC connected; type
SUPER (slowly) and return; the unit will now be in
Supervisor mode, the unit may now be disconnect-
ed from the PC.
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Issue 04, 06/2007
Customising the operating mode
AutoSigma 3000