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From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
12-01-2014 07:46 AM
Hello,
I need to measure strain of 3 jauges (every jauge acquire strain of 3 directions).
I would to know if i could use 3 unity of NI 9219 on one chassis?
Because i tried to use 2 acquisition board and i get an error! I should use only one board!
Thanks,
Solved! Go to Solution.
12-01-2014 07:56 AM
12-02-2014 09:40 AM
Hello Dennis_Knutson,
The picture of the unity (or module) is attached. In fact, i would to use 3 of it on the same chassis ( in the second picture).
Thank you very much,
12-02-2014 09:48 AM
12-02-2014 10:59 AM
It is not channels! I mean 4 pieces of NI 9219 which i will use on the chassis!!
I have 9 strain gages to connect !
Thanks,
12-02-2014 11:09 AM
Simulating a cDAQ-9174 Chassis with 3 cDAQ-9219 modules in NI MAX does not generate any errors hence I'd say yes, it is possible.
To make sure, I strongly recommend to contact your local NI service.
Regards, Jens
12-02-2014 11:13 AM
Unfortunatly the 9219 is one of the devices that does not support a single Task with phyical channels on different devices. You will need 3 Tasks (one for each device)
An Action Engine somewhat simillar to this example (where I ran into a simillar situation with multiple cDAQ devices) can help out a lot:
12-02-2014 11:14 AM
12-02-2014 11:23 AM
@M.A.H wrote:
Thanks very much @JensG69.
I would know also how would i calibrate the NI 9219.
Assuming you want to account for the strain guage variabilities: Rotate the guages and place a known mass on top. Record the measurement with and without the mass. Adjust the channel's "Scale" Slope and offset per actual recorded values.
Calibration of the 9219 is a different matter- It should have shipped with a certificate of calibration. Well, actually, they are on-line and you look them up by serial number from "MyProducts" on your ni.com profile (you do need to register your products!)
12-02-2014 11:37 AM
Thanks Jeff·Þ·Bohrer
I have registred my product now. The system must verify the product then i will download the certificate!
I would thank you another time for your answers.