NI sbRIO-9632/9642 Verification Procedure This document contains information about verifying the National Instruments sbRIO-9632/9642. This document does not contain information about programming techniques or compiler configuration. Conventions The following conventions appear in this manual: » The » symbol leads you through nested menu items and dialog box options to a final action. The sequence Options»Settings»General directs you to pull down the Options menu, select the Settings item, and select General from the last dialog box. bold Bold text denotes items that you must select or click in the software, such as menu items and dialog box options. Bold text also denotes parameter names and hardware labels. Italic Italic text denotes variables, emphasis, a cross-reference, or an introduction to a key concept. Italic text also denotes text that is a placeholder for a word or value that you must supply. monospace Monospace text denotes text or characters that you should enter from the keyboard, sections of code, programming examples, and syntax examples. This font is also used for the proper names of disk drives, paths, directories, programs, subprograms, subroutines, device names, functions, operations, variables, filenames, and extensions. Software Requirements Performing verification on the NI sbRIO-9632/9642 requires LabVIEW, LabVIEW Real-Time, LabVIEW FPGA, and the NI-RIO driver. For information about the minimum software versions for these devices, go to ni.com/info and enter the Info Code rdsoftwareversion. For information about setting up and configuring the devices, refer to the NI sbRIO-961x/963x/964x and NI sbRIO-9612XT/9632XT/9642XT User Guide, available at ni.com/manuals. Documentation You may find the following documentation helpful as you write the verification procedure: • NI sbRIO-961x/963x/964x and NI sbRIO-9612XT/9632XT/9642XT User Guide—This document describes how to use the NI sbRIO-9632/9642 and includes specifications and terminal assignments. The limits you use to verify the accuracy of the devices are based on the specifications found in this document. You can download the latest version of this document from ni.com/manuals. • NI CompactRIO Setup and Services—This Web page contains a step-by-step guide to installing software on and configuring CompactRIO systems. The information about installing software and configuring IP settings applies to Single-Board RIO as well as to CompactRIO. Go to ni.com/info and enter the Info Code rdcriostartup to use this resource. Test Equipment National Instruments recommends that you use the following equipment for verifying the NI sbRIO-9632/9642. Table 1. Recommended Equipment Equipment Recommended Model Requirements Voltage Source NI 6120 If this instrument is unavailable, use a voltage source with an accuracy of at least 400 ppm. DMM NI 4070 If this instrument is unavailable, use a DMM with an accuracy of at least 100 ppm. NI sbRIO-9632/9642 Verification Procedure 2 ni.com Test Conditions Follow these guidelines to optimize the connections and the environment: • Keep connections to the device as short as possible. Long cables and wires act as antennae, picking up extra noise that can affect measurements. • Use shielded copper wire for all cable connections to the device. • Use twisted-pair wire to eliminate noise and thermal offsets. • Maintain an ambient temperature of 23 ±5 °C. The device temperature will be greater than the ambient temperature. • Keep relative humidity below 80%. • Allow a warm-up time of at least 30 minutes to ensure that the measurement circuitry is at a stable operating temperature. Initial Setup You must configure the network settings of the sbRIO device and install software on it before you can perform the verification procedure. Refer to the Configuring Your CompactRIO System so You Can Communicate with It section and the Installing Software on the CompactRIO Controller section of the NI CompactRIO Setup and Services Web page. Verification Procedure Verification determines whether the device is operating within specifications. The NI sbRIO-9632/9642 has 32 16-bit analog inputs and 4 16-bit analog outputs. You can verify any or all of them, depending upon your desired test coverage. You can verify the measurement accuracy of the analog inputs and the output voltage accuracy of the analog outputs. Measurement Accuracy Verification Complete the following steps to test the measurement accuracy of the device: 1. Create a LabVIEW project and add the NI sbRIO-9632/9642 to the project. On the C Series Module Properties dialog box for the NI 9205 module, configure the NI 9205 to take differential voltage measurements and output calibrated data. 2. Connect the voltage source to the channel you want to verify. Connect the positive lead to AIx and the negative lead to AI GND. If the © National Instruments Corporation 3 NI sbRIO-9632/9642 Verification Procedure calibrator has a guard connection that is not internally connected, connect that terminal to AI GND. Refer to Figure 1 for the pin assignments. Pin 1 Pin 50 AI GND 1 2 AI0 AI8 3 4 AI9 AI1 5 6 AI GND AI2 7 8 AI10 AI11 9 10 AI3 AI GND 11 12 AI4 AI12 13 14 AI13 AI5 15 16 AI GND AI6 17 18 AI14 AI15 19 20 AI7 AI GND 21 22 AI16 AI24 23 24 AI25 AI17 25 26 AI GND AI18 27 28 AI26 AI27 29 30 AI19 AI GND 31 32 AI20 AI28 33 34 AI29 AI21 35 36 AI GND AI22 37 38 AI30 AI31 39 40 AI23 AI SENSE 41 42 AO GND AO3 43 44 AO GND AO2 45 46 AO GND AO1 47 48 AO GND AO0 49 50 AI GND Figure 1. Pinout of I/O Connector J7, Analog I/O 3. Set the output voltage of the voltage source to the first Test Point value indicated in Table 2. 4. Create a LabVIEW VI that measures the analog input voltage for one input range on AIx. Take 100 measurements at 10 μs intervals. 5. Average the 100 acquired voltage values and compare the resulting average to the Upper Limit and Lower Limit values listed in Table 2. If the result is between those values, the device is operating within specifications. 6. Repeat steps 3 through 5 for all Test Point values. 7. Repeat steps 1 through 6 for all input channels. 8. Disconnect the voltage source from the device. NI sbRIO-9632/9642 Verification Procedure 4 ni.com Analog Output Voltage Accuracy 1. Create a LabVIEW project and add the NI sbRIO-9632/9642 to the project. On the C Series Module Properties dialog box for the NI 9263 module, configure the NI 9263 to output calibrated data. 2. Connect the DMM to the analog output channel you want to verify. Connect the positive lead to AOx and the negative lead to a COM terminal. Refer to Figure 1 for the pin assignments of the NI sbRIO-9632/9634. 3. Create a LabVIEW VI to output a constant voltage equal to the first test point. 4. Take 100 measurements at 20 μs intervals. 5. Average the 100 values and compare the resulting average to the Upper Limit and Lower Limit values listed in Table 3. If the result is between those values, the device is operating within specifications. 6. Repeat steps 3 through 5 for all test points. 7. Repeat steps 2 through 6 for all output channels. 8. Disconnect the DMM from the device. Analog Voltage Accuracy Tables and Formulas The test limits in Table 2 were derived from the accuracy specifications in the NI sbRIO-961x/963x/964x and NI sbRIO-9612XT/9632XT/9642XT User Guide. Table 2. Analog Input Voltage Values Test Point Two-Year Limits Full-Scale Range (V) Location Value (V) Lower Limit Upper Limit ±10 Max 9.98000 9.94340 10.01660 ±10 Mid 0.00000 –0.02308 0.02308 ±10 Min –9.98000 –10.01660 –9.94340 ±5 Max 4.99000 4.97143 5.00857 ±5 Mid 0.00000 –0.01177 0.01177 ±5 Min –4.99000 –5.00857 –4.97143 ±1 Max 0.99800 0.99373 1.00227 ±1 Mid 0.00000 –0.00290 0.00290 © National Instruments Corporation 5 NI sbRIO-9632/9642 Verification Procedure Table 2. Analog Input Voltage Values (Continued) Test Point Two-Year Limits Full-Scale Range (V) Location Value (V) Lower Limit Upper Limit ±1 Min –0.99800 –1.00227 –0.99373 ±0.2 Max 0.19960 0.19823 0.20097 ±0.2 Mid 0.00000 –0.00109 0.00109 ±0.2 Min –0.19960 –0.20097 –0.19823 The test limits in Table 3 were derived from the Calibrated, max (–40 to 85 °C) Gain Error and Offset Error in the NI sbRIO-961x/963x/964x and NI sbRIO-9612XT/9632XT/9642XT User Guide. Table 3. Analog Output Voltage Values Test Point Two-Year Limits Full-Scale Range (V) Location Value (V) Lower Limit Upper Limit ±10 Max 9.50000 9.3865 9.6135 ±10 Mid 0.00000 –0.08025 0.08025 ±10 Min –9.50000 –9.6135 –9.38650 Device Test Limits Using the Table The following definitions describe how to use the information in Tables 2 and 3. Range Range refers to the minimum or maximum voltage range of an input signal. Test Point The Test Point is the voltage value that is input or output for verification purposes. This value is broken down into two columns—Location and Value. Location refers to where the test value fits within the test range. Value refers to the voltage value to be verified. Max refers to maximum value, Min refers to minimum value, and Mid refers to mid-scale. NI sbRIO-9632/9642 Verification Procedure 6 ni.com Two-Year Limits The Two-Year Limits column contains the Upper Limits and Lower Limits for the test point value. When the device is within its two-year calibration interval, the test point value should fall between these upper and lower limit values. Where to Go for Support The National Instruments Web site is your complete resource for technical support. At ni.com/support you have access to everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers. National Instruments corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504. National Instruments also has offices located around the world to help address your support needs. For telephone support in the United States, create your service request at ni.com/support and follow the calling instructions or dial 512 795 8248. 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