Hi,
I have a bit of a problem with the U6-pro,
2 things happen and may be they are dependent.
1. I nothing is wired on the Lab Jack, not a single one, I get a reading on AIN of around 7 Volt, is this normal?
This is gone If I connect the AIN with Ground level of the LabJack, so it is not a error in the reading.
2. If I have for example 3.000 Volt on AIN 1 and apply 5.000 Volt on AIN 2 than AIN 1 is changing from 3.000 to 3.020. If I do it the other way around than the 5 Volt chnage to 5.500V or simular.
You can see that something is proper wrong but I just don't have a idea what is the problem.
Any ideas? thanks
Daniel
open circed voltage
Started by
DanielIIC
, Oct 15 2012 11:03 AM
1 reply to this topic
#2
LabJack Support
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- Admin
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Posted 15 October 2012 - 11:53 AM
1. That is likely fine. There is not predictable expected voltage from a floating channel:
http://labjack.com/s...s-guide/2.6.3.8
2. If the reading from a channel varies depending on the voltage of the channel read previously, that suggests a settling problem. Perhaps the signal is weak? That is, does the signal have high source impedance?
https://forums.labja...?showtopic=5900
https://forums.labja...?showtopic=5770
https://forums.labja...?showtopic=5237
http://labjack.com/s...s-guide/2.6.3.8
2. If the reading from a channel varies depending on the voltage of the channel read previously, that suggests a settling problem. Perhaps the signal is weak? That is, does the signal have high source impedance?
https://forums.labja...?showtopic=5900
https://forums.labja...?showtopic=5770
https://forums.labja...?showtopic=5237
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