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CALIBRATION PROCEDURE
SCXI -1503
™
Français
This document contains information for verifying and adjusting the SCXI-1503 module using
NI-DAQmx 8.1 or later. For more information about calibration, visit
Contents
Software Requirements........................................................................................................................ 1
Documentation Requirements.............................................................................................................. 2
Calibration Interval .............................................................................................................................. 2
Test Equipment .................................................................................................................................... 3
Test Conditions .................................................................................................................................... 3
Calibration Procedures......................................................................................................................... 4
Initial Setup.................................................................................................................................. 5
Self-Calibration............................................................................................................................ 8
MAX .................................................................................................................................... 8
Verification .................................................................................................................................. 8
Verifying the Analog Input.................................................................................................. 8
Verifying the Excitation Current ......................................................................................... 11
Adjustment................................................................................................................................... 11
Adjusting the Analog Input.................................................................................................. 12
Adjusting the Excitation Current ......................................................................................... 14
Where to Go for Support ..................................................................................................................... 15
Software Requirements
Calibrating the SCXI-1503 requires installing NI-DAQmx 8.1 or later on the calibration system.
You can download NI-DAQmx from
self-calibration and external calibration in the LabVIEW, LabWindows/CVI, C/C++, C#, and
Visual Basic .NET application development environments (ADEs). When you install NI-DAQmx 8.1 or
later, you only need to install support for the ADE that you intend to use.
Deutsch
ni.com/manuals
ni.com/downloads
ni.com/calibration
. NI-DAQmx 8.1 or later supports
.
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Table of Contents
Related Manuals for National Instruments SCXI-1503
Summary of Contents for National Instruments SCXI-1503
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Page 1: Table Of Contents
Adjusting the Excitation Current ..................14 Where to Go for Support ........................15 Software Requirements Calibrating the SCXI-1503 requires installing NI-DAQmx 8.1 or later on the calibration system. You can download NI-DAQmx from . NI-DAQmx 8.1 or later supports ni.com/downloads self-calibration and external calibration in the LabVIEW, LabWindows/CVI, C/C++, C#, and Visual Basic .NET application development environments (ADEs). -
Page 2: Documentation Requirements
You can find the latest versions of the documentation at ni.com/manuals Calibration Interval National Instruments recommends a calibration interval of one year for the SCXI-1503. You should adjust the recommended calibration interval based on the measurement accuracy demands of your application. -
Page 3: Test Equipment
• Maintain an ambient temperature of 25 ±10 °C. The SCXI-1503 module temperature will be greater than the ambient temperature. If you plan to operate the SCXI-1503 at a specific temperature outside this range, calibrate the module at that temperature. -
Page 4: Calibration Procedures
NI for a factory calibration. Reverification—Repeat the verification procedure to ensure that the module is operating within the published specifications after adjustment. These procedures are described in more detail in the following sections. SCXI-1503 Calibration Procedure ni.com... -
Page 5: Initial Setup
SHC68-68 EPM Cable (for M or X Series DAQ Device) 12 NB1 Ribbon Cable Test Computer, with NI PCI(e) DAQ Device Typical Setup for Verification and Adjustment Using an NI PCI(e) DAQ Device Figure 1. © National Instruments SCXI-1503 Calibration Procedure... - Page 6 Typical Setup for Verification and Adjustment Using an NI PXI(e) DAQ Device Figure 2. Power off the SCXI-1000 chassis. Insert the SCXI-1503 into any available SCXI-1000 chassis slot. Note If you are using an NI PCI(e) DAQ device, connect the SCXI-1349 to the NI PCI(e) DAQ device using an SHC68-68 cable.
- Page 7 AI– IEX– Ch X ON = Closed Configuration Switches (shown in Off position) Switch Legends Ground Lug SCXI-1306 Switch Diagram Figure 3. Install the SCXI-1306 on the SCXI-1503 DUT. Power on the SCXI-1000 chassis. © National Instruments SCXI-1503 Calibration Procedure...
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Page 8: Self-Calibration
Analog input. • Excitation current. Note Limits in Table 2 are based on the March 2007 edition of the SCXI-1503 User Manual, which includes the specifications. Refer to to determine if there is a more recent edition ni.com/manuals of the specifications. If a more recent edition of the specifications is available, recalculate the limits based upon the latest specifications. - Page 9 The DAQ device scaling coefficients, a and a , are the same for each channel on the SCXI module since the DAQ device multiplexes all SCXI channels to channel ai0 on the DAQ device. Clear the task. © National Instruments SCXI-1503 Calibration Procedure...
- Page 10 -0.090101695 -0.089898305 10. Create an AI voltage channel with an input range of ±10 V for one channel on the SCXI-1503. 11. Configure the SCXI-1503 input channel for a finite acquisition with a sample rate of 1000 Hz and 1000 samples per channel.
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Page 11: Verifying The Excitation Current
22. Repeat steps 9 through 21 for the remaining channels. Verifying the Excitation Current Complete the following steps to verify the excitation current of the SCXI-1503: Connect IEXx+ and IEXx- to the DMM current input where x is a channel value from 0 to 15. -
Page 12: Adjusting The Analog Input
Adjusting the Analog Input Complete the following steps to adjust the analog input of the SCXI-1503: Connect the calibrator output to all of the input channels on the SCXI-1306. Note Ensure that all switches on the SCXI-1306 are in the off position as shown in Figure 3. - Page 13 NI-DAQmx Function Call Call with DAQmxSetup1503Cal the following parameters: calHandle: calHandle channelName: , where x Dev1/aix refers to the channel number gain: Configure the DMM to measure voltage at the CB-50 outputs and take a measurement. © National Instruments SCXI-1503 Calibration Procedure...
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Page 14: Adjusting The Excitation Current
DAQmx_Val_Action_ commit 14. Repeat steps 7 through 13 using a gain of 100 on the SCXI-1503. 15. Self-calibrate the SCXI-1503. Adjusting the Excitation Current Complete the following steps to adjust the excitation current of the SCXI-1503: Connect IEXx+ and IEXx- to DMM current input with x being the number of the channel from 0 to 15. -
Page 15: Where To Go For Support
Web sites, which provide up-to-date contact information, support phone numbers, email addresses, and current events. CVI, LabVIEW, National Instruments, NI, ni.com, the National Instruments corporate logo, and the Eagle logo are trademarks of National Instruments Corporation. Refer to the Trademark Information at ni.com/trademarks for other National Instruments trademarks. The mark LabWindows is used under a license from Microsoft Corporation.