Can't seat autosampler on Agilent 6890

Discussions about GC and other "gas phase" separation techniques.

2 posts Page 1 of 1
Been trying for about a week now; maybe someone here has some advice.

I purchased a tested autosampler (G1513A injector + tray), and had to do a bit of finagling in order to get the tray to seat correctly. Once that was on, I tried to mount the injector. No dice: it is as if the septum nut is too close to the guide rod.

I put everything together, slide the tower down the guide post, and try to align the feet. What keeps the feet from falling into place is how the septum nut won't fit into the bottom of the tower. If I take the septum nut off, everything fits into place. If I take the septum nut and try to fit it into the hole in the bottom of the tower, it fits fine.

I have tried loosening some screws, tightening some screws, loosening and tightening the guide rod, all sorts of different things. Thinking it was the alignment of the injector, I have removed and replaced it 3-4 times now, and even tried shims under the "legs" of the perforated metal piece on the injector in order to change its position slightly. No dice.

Having spent 4-5 hours on this, I'm out of ideas. What am I missing? It is as if the septum nut is a little too far to the left of the instrument, not fitting into the hole for it in the bottom of the tower, but no adjustments seem to fix this.
"6890 Series GCs
All 6890 Series GCs require the replacement of the inlet fan cover before
installing any component of the 7693A ALS system. Most 6890 Series GCs
also require the replacement of the injection port top cover. The procedure
below prepares the 6890 Series GC inlet area for the 7693A ALS system"

page 29 ... -90010.pdf
2 posts Page 1 of 1

Who is online

In total there are 13 users online :: 0 registered, 0 hidden and 13 guests (based on users active over the past 5 minutes)
Most users ever online was 599 on Tue Sep 18, 2018 9:27 am

Users browsing this forum: No registered users and 13 guests

Latest Blog Posts from Separation Science

Separation Science offers free learning from the experts covering methods, applications, webinars, eSeminars, videos, tutorials for users of liquid chromatography, gas chromatography, mass spectrometry, sample preparation and related analytical techniques.

Subscribe to our eNewsletter with daily, weekly or monthly updates: Food, Environmental, (Bio)Pharmaceutical, Bioclinical, Liquid Chromatography, Gas Chromatography and Mass Spectrometry.

Liquid Chromatography

Gas Chromatography

Mass Spectrometry