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Part 1. The 7673 ALS The Automatic Liquid Sampler
Configuring the injector
Slow Plunger—The speed of the syringe plunger during injection. Enables you
to reduce the average speed of the plunger and hold the syringe needle in the
inlet for 4 seconds after the injection. Turning the setpoint On pushes at a rate
of about 5 µL/sec (with a 10 µL syringe)—Off is about 20 times faster. The
plunger speed during the pump and waste dispensing does not change.
Procedure: Editing injector setpoints
Accessing either of the injector keys allows you to edit injector control setpoints,
such as injection volumes, sample and solvent washes, etc.
To edit the injector setpoints:
1. Press [Front Injector] or [Back Injector].
2. Scroll to the desired setpoint.
3. Enter a setpoint value or turn the setpoint On or Off.
Configuring the injector
Tower position
Injector cables are connected to either the INJ1 or INJ2 port on the
controller. This setpoint indicates which tower is on which inlet. With only one
injector, you do not have to move cables when you move the tower, merely
reconfigure the tower position.
Waste bottle position
The turret waste bottle positions are controlled by entering a value of:
• 0 for the A position only
• 1 for the B position only
• 2 to alternate between the two waste bottles
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