Chromatography Forum

I have an Agilent 5890 connected to an external non-Agilent detector.

Does anybody know a way to wire up a contact closure system to trigger an external detector to start with injection?

Thanks!

I'll try to look at my 5890 books. I formerly used a contact closure on a 5890A where a contact closure on the autosampler triggered the 5890A GC oven to start; that connected on the top right panel, two wires. Also, are you using an autosampler or not?

jdlh199,

So you want a start out from the GC, right?

"Pins 7 & 8 and 10: Two sides of a normally-open relay. Contacts are pulsed closed for 50 msec to signal "start run" when EITHER of the following occur:

If pins 3 & 4 are unconnected, the relay is pulsed when "start" is pressed

If pins 3 & 4 are connected, the relay is pulsed when the oven temp. program starts. "

These pins are located under the right hand top cover of the 5890 over the keypad in the "remote" receptacle. Nominally, pin 12 is the furthest back left hand pin and pin 11 is the furthest right hand pin but a volt-ohm meter and some experimenting will get you there.....

Just out of curiosity, what detector?

Best regards.

CPG - Yes the GC has the autosampler and injector and will just trigger an external detector (which the capillary column is inserted into) when the oven program starts or when injection occurs.

AICMM - Thanks for the info! I'll take a look today!

It's an ICPMS

Can I still jerry-rig these connections if there's a cable plugged into that remote port? The autosampler control box plugs in there.

If anyone is interested, the answer is yes, you can just splice the wires to connections #7 and #8 and send these to the detector.

Contact closes nicely!

Thanks for the tips....

ps... found this to be of help:

http://www.willstein.com/Resources/HP%2 ... ations.pdf