Uncalibrated value PCI 6110

[cmedina]

Hello,

I am using a PCI 6110 device, the problem is when I run the test sample the input in DevAI0 is a flat line at 5 V, doesn´t change at all. In MAX, if I select the option to calibrate, before doing the calibration, the uncalibrated value shown is 4.996 approximately. Is there a way to fix that? I don´t have a high precision voltage source mentioned in the calibration procedure.

[Hey.itsDale]

When you say "flat line" does that mean you are reading the output graphically? Are the 5V readings recorded when you are measuring a 5V precision source? Or is this any time you make a reading?

Also, keep in mind that the calibration you are performing is meant to offset cabling and sensor error. It is not a full calibration and will not be stored in the on board EEPROM as explained here:

http://digital.ni.com/public.nsf/allkb/77CC7AF594DA9078862576F1007743FE

Furthermore, it probably doesn't make sense to worry about a difference of 4mV because this is already just about within the accuracy specification of the 6110 at a measuring range of +/-5V:

http://www.ni.com/pdf/manuals/370980a.pdf

The accuracy will likely be worse if the device has not been through a full calibration procedure in the past year. You can perform a full calibration by sending your device to NI or following the instructions here:

http://www.ni.com/pdf/manuals/370937p.pdf

[cmedina]

Hello,

The flat line at 5V appears without measuring anything else. It also appears in Test Panels in MAX.

Thanks.

[cody_a]

Try shorting AI0 to GND and measuring the voltage with a Test Panel in MAX.  If you still see 5V, it's very likely that the device is damaged and needs to be sent in for repair - check out this KB for instructions.

[cmedina]

How can I do the shorting AI0 to GND? Thanks.

[Hey.itsDale]

You will need to physically wire them together. Can I ask what terminal block you are using with the 6110?

[cmedina]

I am using the BNC 2110 block. 

[Hey.itsDale]

The simplest way would be to use a Grounded reference source configuration and wire the center conductor of the AI 0 port to its outer shield.