AI NC SE Test Failed | LabJack
 

AI NC SE Test Failed

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em_ma
em_ma's picture
AI NC SE Test Failed

Hello, I'm trying to connect the LabJack U12 to Horiba Mass Flow Controller. The LJTest fails one test: AI NC SE Test. I checked the LJLogger and the first two channels (SD0 and SD1) read less than 1.43 volts, around 0.5 volts.

How can I fix the problem?

Thanks

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LabJack Support
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LJtest will fail if anything

LJtest will fail if anything is connected besides USB:

https://labjack.com/support/datasheets/u12/example-applications/ljtest

Also note that floating analog inputs on the U12 sit at around 1.43 volts.  See the last paragraph here:

https://labjack.com/support/app-notes/floatingunconnected-inputs

 

em_ma
em_ma's picture
So, it might work properly,

So, it might work properly, right? I shouldn't be concerned about the failed test because it's already connected to the Horiba MFC.

LabJack Support
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Correct.  If you have

Correct.  If you have anything connected it is normal for LJtest to fail.