How to use an external trigger on an electrometer (KEITHLEY 6517A)

[radiofysik]

I'm really new using LABVIEW, so please, be patient with me...

I'm using a KEITHLEY electrometer to acquire data from a dosimeter. We are going to do some measurements on a pulsed source and before the pulse there's a trigger signal. I don't know the size of the trigger, I'll just know that when I start my measurements (in another lab) So I would like to implement a case were the user can decide the value of the external trigger, so this information goes to the eqipment before starting the measurement.

What I would like to know is... Someone can give me a hint on how to do that? I'm using GPIB and LABVIEW 7.1.  and I already took all the 6517A libraries for labview.

Thank you all

[francois-normandin]

The external trigger on a 6517 is a TTL signal. Any pulse higher than 3.4V will trigger it. You cannot program the threshold level.

You can set the delay programmatically with TRIG: DEL <n> command.

ref: page 2-81 and following of User Manual

Message Edited by normandinf on 10-21-2008 03:55 PM