SC-3 Autosampler Alignment Adjustment

SC-3 Autosampler Alignment Adjustment


Pre-Checks
1. Looking down on the autosampler head, there are two screws that go through metal springs and attach to the cap.  Ensure that they are snug, but do not strip them.

2. Run a few tests sample runs to see if there is a consistent pattern of the bubbler missing to the right/left of the tube.

Adjustment
1) Power the SC off.  Remove the bubbler.  It is ok to leave the RA powered on

2) Remove the screws holding the back panel in place on the SC-3

3) Gently remove the back panel


The panel will pull away, however there will be some wires holding the plug to the main 
body. Do NOT remove the wires or pull on this too hard.  Gently set the back panel on its back to 
expose the inside.

4) Click the SC to ‘ON’. It will begin to run through its startup sequence.  When it lowers the
head down and reaches the bottom, it will pause.  At the pause, and BEFORE it raises up, click 
the SC ‘OFF’.  This will position it in the best place to access the sensor.  If you miss this 
step, restart the sequence and stop it on the next run.

5) You can now rotate the head out manually.  Gently push the arm to where the head would be over the samples.

6) You’ll notice a small metal shim (photo below) that rotates outward as you move the head outward.  This controls the “starting” position relative to the arm.



7) LOOSEN, but do not remove, the two screws that hold the shim in place, and move the shim SLIGHTLY toward you or away from you depending on which direction the alignment was originally missing.  This will alter the starting position.  Power on the SC and check the new position and its alignment.  If the position is still off, repeat the procedure until the position looks correct. Run a blank tube on position 1 and position 40 to check that the alignment has been corrected.

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