Accessing Strain Gage Calibration Information Set in MAX Primary Software: LabVIEW Development Systems>>Professional Development SystemPrimary Software Version: 7.1 Primary Software Fixed Version: N/A Secondary Software: Driver Software>>NI-DAQmx Hardware: SCXI>>Terminal Blocks>>SCXI-1314, SCXI>>Modules>>SCXI-1520
Problem: I calibrated my strain gage(s) when I created NI-DAQmx Channels in Measurement and Automation Explorer (MAX). How can I retrieve this information to save to file or to display to my user? Solution: Within LabVIEW, you can access the gain adjustment, coarse potentiometer, and fine potentiometer values set by MAX when calibrating your strain gage channels. To access this information, place down a DAQmx Channel property node on the block diagram found on the DAQmx palette. Resize the property node and select the following three properties:
To read these properties, you must right click on the property node and select "Change All to Read". The coarse and fine potentiometers are used to zero your strain gage. See Chapter 4 of the SCXI-1520 User Manual linked below for more information on the gain adjustment, coarse potentiometer, and fine potentiometer settings. Note: If you cannot browse to the properties listed above, they are being filtered because you do not currently hardware installed that supports strain gage channels. If you would like to see the properties, you can right-click the top (yellow) part of the property node, and choose "Select Filter...". From here, choose "Show All Attributes" and click OK. If you are programming in C, you can also access these properties. Use the following function calls:
See the NI-DAQmx C Reference Help at Start » Programs » National Instruments » NI-DAQ for more information. Related Links: Product Manuals: SCXI-1520 User Manual Attachments:
Report Date: 03/16/2005 Last Updated: 03/24/2006 Document ID: 3JFGH0XL |
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