3800 GC analog pin assignment

[bsmouse]

We are using a Varian CP-3800 GC and are trying to connect to our computer via a LabJack. To do this it would be extremely helpful if someone knew the pin assignments for the J6 analog out on the GC. Does anyone know these pinouts?

[tsoukalas1]

Hello,

I don't know what is "Labjack" so i can't help you for this item.

J6 connector is used to connect analog device. PIN position are not factory-configured, and You can configure the pin in the GC dependind your detector.

Please find below an abstract of the manual. I am sorry, i don't know how to attach this document in my post.
If you send me your e-mail adress, i will send you the manual. Information will be located P.160.

I am not a specialist of 3800. I hope it's will help.

"Analog Communications
The 3800 is equipped with three analog output ports. These are located on
connector J6 on the top of the GC, accessed by removing the top left cover.
This connector contains all three analog channels plus status signals for
“Ready In” to the GC and “Start Out” from the GC. The individual analog
ports can be assigned to any installed detector on the 3800. The ports are
identified as analog port A, analog port B and analog port C with the default
assignment being front detector, middle detector and rear detector
respectively.

The analog output ports are programmed in the 3800 method by pressing the
OUTPUT key on the keyboard. This brings up a menu screen from which
you choose one of the three ports to program; A, B or C. "

[bsmouse]

Hello tsoukalas1 thank you for your reply. A LabJack is an analog to digital converter we are using for data acquisition. I understand you can configure the analog ports for which detector you want, our problem is needing to know what each hole means in the connection port. There are 15 pins on the male end of the cable which correspond to 15 holes on the connection port and these are the assignments we need to know.

[tsoukalas1]

Hello,

I don't have the cabling diagram of th J6 connector and i don't find it on internet. I'm sorry...

If you don't find it, you can try to mesure the DDP of each pin with a voltmeter during an acquisition.
I'm not sure, you would have :
-1 cable pair for the analog A
-1cable pair for the analog B
- 1cable pair for the analog C
-1cable pair for "ready in" to the 3800 GC
-1cable pair for "start out" from the 3800 GC.

I can't help you many more on this item...

Good luck

Pierre

[AmeliaShen]

Hello tsoukalas1 thank you for your reply. A LabJack is an analog to digital converter we are using for data acquisition. I understand you can configure the analog ports for which detector you want, our problem is needing to know what each hole means in the connection port. There are 15 pins on the male end of the cable which correspond to 15 holes on the connection port and these are the assignments we need to know.

I have met the same problem with you. I know it has been a long time but I would like to know have you figure it out ? Thanks.