PCI 6229 incorrect voltage reading 10.5V on all channels

[caseyql]

Hi,

I have a PCI-6229 connected to a SCB-68. All channels are reading 10.56V even when nothing is connected. I have transducers set up to multiple ports and they are all reading 10.56V on the MAX device test, but when I measure the voltage on the SCB-68 with a multi-meter I am reading values that are realistic and fluctuate. I set up a powersupply set to give 6 V, the multimeter confirmed that the power supply was infact supplying 6V, but MAX showed the reading as 10.56V. When I unplug the transisters there is no change in the voltage reading on MAX remains at 10.56. I tried a new SCB-68 card and got the same readings. When I changed out the PCI-6229 card to a card from another lab the voltage measurements in MAX matched those of the multimeter, so the problem is with my PCI-6229 card. The weird thing is that the SCB-68 card is hooked up to a blower, but the blower can still be controlled from labview, so the PCI-6229 card isn't completely blown. How is this possible? Is the card completely shot (i.e. need a replacement/repair) or since the card can still controll the blower is there a different problem that I can fix here?

Thanks,
Casey

[Dennis_Knutson]

You have not provided sufficient information. What sort of connection (differential or rse) does the sensor require? What sort of connection do you have programmed? What pins do you have wired?

[AnalogKid2DigitalMan]

Any chance the cable on the PCI card end was not fully secured?

On the suspect card, use the self test and test panels in MAX to check things out.

The analog input section is different circuity than the digital I/O, so perhaps the analog died while the digital still works.

-AK2DM

[caseyql]

Sensor is set up with differential connection. The wires are wired as differential.

AI0/AI8 (pins 68/34)

AI1/AI9 (pins 33/66)

AI2/AI10 (pins 65/31)

AI3/AI11 (pins 30/63)

AI4/AI12 (pins 28/61)

AI5/AI13 (pins 60/26)

AI6/AI14 (pins 25/58)

[caseyql]

I tried removing and re-inserting the card a few times, also checked a different PCI slot. I used the self test and reset card on MAX, but it passed everything. When I test pannels I get the 10.56 V.

Perhaps only the analoug section is blown?

[Mcdan · Accepted solution]

caseyql,

One thing that you can do the check the fictionally of your card is to read internal channels of the device.  In the test panel select channel DevX/_calref_vs_aignd.  I believe this channel should read around 5 V.  Read DevX/_aignd_vs_aignd.  This should read around 0 V.  If these channels read correctly, I would take a closer look at your signal connections.  If these channels do not work, then I would think that there is an issue with your device.

Dan