Chromatography Forum

Good afternoon,

I've been having issues with my 7683B ALS (connected to a 7890A GC). Backstory: Had software issues that Agilent couldn't fix. Ended up having to uninstall and reinstall Chemstation. Also ended up getting a new cryo valve. We had backup methods saved prior to uninstalling the original ChemStation.

Present: I have my method set up to inject with the front injector (INJ1). Everything on Chemstation matches the GC parameters. I start the sequence and the sample tray begins moving my vial. It moves the vial to the ALS, the turret rotates to a WA slot, does some half injection, and then everything goes back to a "Ready for Injection" state.

The GC, which was "Ready for Injection", now reverts back to "Not Ready" (need to prep run), the ALS is back on the green "ready" light, and ChemStation software changes from "Sequence in Progress" to to "Ready" as if I never started a sequence.

The instrument panel on ChemStation contains the following error:
ALS Failure State: Preparing Samples
ALS Failure Code {142}: Autosampler Setpoint Error

Anyone come across this issue who can help me out?

Thank you

dj

Have you tried to re-calibrate the autosampler?

Any obstacles that can interfere with its movement?

Hi DJ,

Did you ever fix the problem? We are having the same error message on the same combination of ALS and GC.

Best,
Mads

Hi.
Have you tried aligning needle ?

I recently ran into this issue.

We had a planned power outage that led to a 7890 not recognizing its 7683 autosampler/tray; no lights on the autosampler tower came on. We took a controller board (the board the autosampler and tray get plugged into) from a scrapped 7890 we use for parts. This allowed the GC to recognize the ALS was present.

However, once we tried to run a sequence, we had the exact same issue as you. We fixed this by updating the firmware of the GC / ALS so that the new board and GC were all speaking the same language.

Hopefully this helps someone.