By Mel on Wednesday, February 12, 2003 - 08:40 am:
Hi all:
I am collecting data via a Sat/In box through Millennium. The problem I am having is the injector we are working with does not have a place for an inject start output that I can use to trigger the Sat/In box to start the run. Does anyone have any idea of a simple way to create a voltage drop that would simulate an inject start signal.
Any help would be appreciated.
Thanks.
By Tom M. on Wednesday, February 12, 2003 - 09:53 am:
What kind of injector are you using?
By Anonymous on Wednesday, February 12, 2003 - 10:40 am:
Are you sure that your injector does not have a start trigger. It would be very unusual for it not to have one.
By A.Nonymous on Wednesday, February 12, 2003 - 12:46 pm:
Mel,
where are you from, maybe you can contact your local Waters dealer.
By Mel on Wednesday, February 12, 2003 - 02:28 pm:
It is a Lachat FIA system, not HPLC. We are suprised that this system does not have an external inject start signal. I have contacted Waters, in fact I am a former engineer with them. I know there must be a way to make an external device on a timer that would give a contact closure to trigger the Sat/in box.
Thanks for your help.
Mel
By Tim on Tuesday, February 18, 2003 - 02:31 am:
If you are using manual injection, you could try to fix up a small micro switch wired to the SAT/IN - I guess it is just a contact closure that it needs and not a voltage change (if that is the case, you may need to find a suitable power source to include in the loop).
If the injection system has an automatic injector, you may still be able to use a microswitch for contact closure, but this would require more work to find the best location. You could also just do a manual contact closure yourself (unless the injection system has an autosampler that runs unattended.)