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RATE control of 6514 electrometer

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jonnard
Posts: 2
Joined: February 17th, 2014, 6:05 am
Country: France

RATE control of 6514 electrometer

Post by jonnard » February 17th, 2014, 6:12 am

Hello,
I use the LabVIEW driver to control my 6514 electrometer. However, it is impossible to change the RATE which is always in the SLOW position.
On the front panel, when the apparatus is in local mode I can change the RATE to SLOW, MEDIUM or FAST. But as soon as the apparatus is configured with the driver it comes back the SLOW.
I thought, after reading the manual, that by choosing the NPLC value on the driver to 0.1 or 1.0 I could select FAST or MEDIUM, but this is not the case. It appears to me that the NPLC value indicated on the driver has almost no effect on the acquisition.
Thank you for your help.
PJ

Norbert W
Keithley Applications
Keithley Applications
Posts: 227
Joined: October 21st, 2010, 7:18 am
Country: Germany

Re: RATE control of 6514 electrometer

Post by Norbert W » February 18th, 2014, 6:18 am

Hello,
I was just testing an example file installed with the following driver:
6514 Native LabView 2009 Driver version 1.0.0 - Project Style
The Sub VI Keithley 6514 Block Read Setup.vi sends a *rst;:conf:volt:dc
which will reset the NPLC setting to default condition (despite it could be
set to a different value by the Sub Vi before).
Not sure if this exactly related to your issue but adding the NPLC setting
to the last command mentioned should certainly help.
In case you are looking at another example / driver please have a look in
single step mode and carefully check whether NPLC is set correctly (use a
probe to make sure) and when it probably gets changed afterwards.

jonnard
Posts: 2
Joined: February 17th, 2014, 6:05 am
Country: France

Re: RATE control of 6514 electrometer

Post by jonnard » February 19th, 2014, 8:44 am

Thank you,
I will try to see this point.
Philippe

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