Keithley 2400 voltage Issue

Hello, I am using Labview 2010 to try to control a Keithley 2400 Sourcemeter by GPIB. I am using the labview drivers from the Keithley 24XX drivers package which I downloaded from the "Find Instrument Drivers" in Labview.
I am trying to use the device as a current source to power an electromagnet. I have the device set up and it will output current, but no matter how high I adjust the compliance value, the voltage output of the sourcemeter will not exceed 2 volts.
I'm pretty sure this is not a device limitation because when I adjust the compliance and current manually the device has no trouble. For some reason when I control the device with labview it just won't go over 2 volts. Any help would be great.
I have included my program here. If anyone needs screenshots to diagnose this issue, let me know.
Solved!
Go to Solution.
Attachments:
KeTest.vi ‏16 KB

Yep, the "Compl" light is blinking, so it is the range compliance. The range compliance is set at 2.1V. I added the "Configure Measurement" vi and set the vi to Auto, but this didn't change the range compliance.
Also, I set the Auto to false and tried adjusting the "Manual Range." When I get above 2.1 V, I get a message that says :
Instrument reports:
824,"Cannot exceed compliance range"
I have included the latest VI here
Is there a VI that changes the compliance range, or a VI that sets it to auto?
Attachments:
KeTest.vi ‏18 KB

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Good Afternoon PiotrW,
1. Could you please provide the code you are using to program the voltage sweeps?
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Hello friends,
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Solved!
Go to Solution.
Attachments:
Keithley 24XX Sweep and Acquire Measurements.vi ‏26 KB

As Dennis said, if you're using the built-in sweep function, you'll have to check the manual. See Section 10-16 (That's section 10 page 16, not sections 10 though 16) of the Keithley 2400 User Manual.
The Keithley 24xx series has a measurement speed in units called PLC (Power Line Cycles). The default speed is 1PLC, meaning a measurement is taken every 1 power line cycle, or 1/60th of a second (16.67ms). 24XX's can go from 0.01 PLC (every 0.16ms) to 10 PLC (every 166.6ms). The faster you measure, the lower precision you get.
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Hi,
I keep getting Error 803 and Error -230 on my Keithley 2400 SourceMeter (connected NI-GPIB-USB-HS; everything is talking correctly) when I use the attached LabView program. I'm using the most updated drivers for VISA, 488.2, and the KE24XX. I've looked at the VI Tree and everything should be okay. Individually, the VIs are not causing errors. Also important to note is that when I take 4W resistance readings from the Keithley without the PC interface the Keithley's display indicate different settings, including ARM, while when recording from computer it displays AUTO and 4W. No data is displayed on the device while recording from computer, while data is displayed without recording from the computer.
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Attachments:
resistdatawrite.png ‏217 KB

Hi coldcarbon!
I did a search and it looks like this is not a totally uncommon occurrence with these devices. I found a few forums searching google, and also was able to find a discussion forum at Keithley's website. These drivers look like they were built by Keithley, and I would encourage you to get in touch with them to figure out what exactly is going on. I wouldn't jump to that issue being a hardware problem just yet.
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Solved!
Go to Solution.
Attachments:
Configure Output.vi ‏18 KB

Thanks very much!
Now I learnt that, I should be always suspicious even with "official" libraries and drivers.
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I got the driver for this instrument off of NI's website at
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The following video demonstrates how to check the firmware revision: http://www.keithley.nl/centralized_display?mn=2400&assetid=55934.
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2400c30.zip ‏358 KB

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volttest2.vi ‏81 KB

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Attachments:
PROGRAM.gif ‏40 KB
ERROR.gif ‏45 KB

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Attachments:
Keithleyreadcurrent.vi ‏63 KB

Keithley 2400 voltage Issue

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