How Do I Save and Re-use Offset Null Information for Strain Measurements with the NI 9237 or NI SCXI-1520?Hardware: CompactRIO>>Analog Input Modules>>NI 9237
Problem: I used to be able to import calibration information with strain measurements tasks when using SCXI. These settings included the Fine and Coarse potentiometer settings used for the offset null settings. When I try to import these settings using a NI 9237, I receive the following error:
Solution: The offset null process occurs entirely in software with the NI 9237. As a result, the hardware calibration parameters such as Coarse and Fine potentiometers commonly used with SCXI are not supported. You can still save and re-use your offset null settings in a similar manner with the 9237 by making use of a different property. The Initial Bridge Voltage property stores the null voltage value for the channel. It is also updated when the offset null process is executed. You can use this property to save and transfer calibration information from application to application. To access the Initial Bridge Voltage property, use a DAQmx Channel Property Node. The property is found by browsing to Analog Input » General Properties » Signal Conditioning » Bridge » Initial Bridge Voltage. This property can be seen in the screenshot below.
Related Links: Product Manuals: NI 9237 Operating Instructions and Specifications (August 2008) Attachments:  InitialBridgeValueProperty.png, error200452.png
Report Date: 03/17/2008 Last Updated: 06/16/2009 Document ID: 4JGFSEQU |
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