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CALIBRATION PROCEDURE
NI PXIe-4357
This document contains information about calibrating National Instruments PXIe-4357
SC Express modules using NI-DAQmx. For more information about calibration, visit
.
calibration
Contents
Software Requirements............................................................................................................. 1
Documentation Requirements .................................................................................................. 2
Calibration Interval................................................................................................................... 2
Test Equipment......................................................................................................................... 2
Test Conditions......................................................................................................................... 3
Calibration Procedure ............................................................................................................... 3
Initial Setup....................................................................................................................... 3
Connecting the Calibrator to the Module ................................................................. 4
Verification....................................................................................................................... 5
4-Wire Accuracy Verification .................................................................................. 5
Adjustment Procedure ...................................................................................................... 7
Specifications............................................................................................................................ 9
Where to Go for Support .......................................................................................................... 10
Software Requirements
Install NI-DAQmx 9.5 or later on the calibration computer. NI-DAQmx includes high-level
function calls to simplify the task of writing software to calibrate modules. You must have the
proper module driver installed on the calibration system before calibrating the module.
NI recommends that you install the NI-DAQmx driver software before
Note
physically installing the NI PXIe-4357. NI-DAQmx, available at
downloads
NI-DAQmx supports a number of programming languages, including LabVIEW,
LabWindows
™
/CVI
™
Français
Deutsch
ni.com/manuals
, configures and controls the NI PXIe-4357.
, C/C++, C#, and Visual Basic .NET.
ni.com/
ni.com/
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Summary of Contents for National Instruments PXIe-4357
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Page 1: Table Of Contents
CALIBRATION PROCEDURE NI PXIe-4357 Français Deutsch ni.com/manuals This document contains information about calibrating National Instruments PXIe-4357 SC Express modules using NI-DAQmx. For more information about calibration, visit ni.com/ calibration Contents Software Requirements......................1 Documentation Requirements ....................2 Calibration Interval........................2 Test Equipment......................... -
Page 2: Documentation Requirements
The NI-DAQmx C Reference Help includes information about the functions in the driver. Calibration Interval National Instruments recommends a calibration interval of one year for the NI PXIe-4357. You should adjust the recommended calibration interval based on the measurement accuracy demands of your application. -
Page 3: Test Conditions
You must configure the module in Measurement & Automation Explorer (MAX) to communicate with NI-DAQmx. Complete the following steps to configure a module in MAX. Refer to the NI PXIe-4357 and TB-4357 Installation Guide and Terminal Block Specifications for complete installation instructions. -
Page 4: Connecting The Calibrator To The Module
Launch MAX. Expand Devices and Interfaces to confirm that MAX detects the module. Right-click the module name and select Self-Test to ensure that the module is working properly. When a module is configured with MAX, it is assigned a module name. Each Note function call uses this module name to determine which DAQ module to calibrate. -
Page 5: Verification
The NI PXIe-4357 has 20 independent analog input channels. You can conduct verification on any or all of them, depending upon your desired test coverage. - Page 6 Create and configure an AI Resistance channel according to the values in Table 3. Table 3. 4-Wire Configuration Values Configuration Value Channel Name Dev1/aix, where x refers to the channel number Min Input Limit Max Input Limit Units Ohms Resistance Configuration 4-wire Current Excitation Source Internal...
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Page 7: Adjustment Procedure
The default password is . You can calibrate as many or as few channel and excitation configurations as desired. The calibration routine for the NI PXIe-4357 uses a two-point calibration to determine the gain and offset adjustment calibration constants. - Page 8 Zero the calibrator with the ohms-only zero (OHMS ZERO) operation. Refer to the calibrator documentation for more information about zeroing the calibrator. This step can be skipped if an OHMS ZERO has already been executed on the calibrator as required by the calibrator for the specified accuracy.
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Page 9: Specifications
Specifications The specifications in Table 5 are provided for reference only, refer to the NI PXIe-4357 Specifications and NI PXIe-4357 User Manual for detailed specification and application information. The values in Table 5 are based on calibrated scaling coefficients, which are stored in the onboard EEPROM. -
Page 10: Where To Go For Support
National Instruments products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National Instruments Patents Notice at ni.com/patents. Refer to the Export Compliance Information at ni.com/ legal/export-compliance for the National Instruments global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data.
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