Special Topics
Performing cool on-column injection onto 250-µm and 320-µm columns
177
TURRET x,y
(continued)
The turret position values may be any integer from 0 to 10.
When either value is omitted, that turret is not affected by
the command. If both are omitted, the command performs
no function. Position values 1 to 10 correspond to ten
equally spaced turret positions at 36-degree intervals. The
motor is left energized after the turret is moved to any of
these positions. The position values 1 to 5 position the
turret with sample positions 1, 2, and 3, A WASH, and A
WASTE, respectively, facing directly toward the front of the
injector.
Position 0 is the rest position of the turret. When an
injector is commanded to go to this position from one of
the other ten positions, it takes the number of motor steps
that should be required to get there and makes sure that it
is at the right position. Then it de-energizes the motor. In
this way, it is possible to check that no motor steps were
lost in going to a turret position and back.
RESET The RESET command clears error conditions in the
injectors and tray. Often after an error has occurred, an
error light will flash an error code and the automatic liquid
sampler will not become ready for the next injection.
Sending the RESET command will correct this condition.
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